diff --git a/ASTPlayground/Script.txt b/ASTPlayground/Script.txt
index c255c9a..e0def51 100644
--- a/ASTPlayground/Script.txt
+++ b/ASTPlayground/Script.txt
@@ -1,9 +1,15 @@
 (do
   ;; ===========================================================================
-  ;; 1. DEFINITIONEN (Wie zuvor besprochen)
+  ;; 1. DEFINITIONEN
   ;; ===========================================================================
 
-  ;; --- WMA Factory (O(1)) ---
+  ;; ---------------------------------------------------------------------------
+  ;; Factory: create-wma
+  ;; Berechnet WMA. Wartet, bis das Fenster voll ist.
+  ;; Phase 1: Warten (< len)
+  ;; Phase 2: Init (= len) -> Loop berechnung
+  ;; Phase 3: Slide (> len) -> O(1) berechnung
+  ;; ---------------------------------------------------------------------------
   (def create-wma
     (fn [len]
       (do
@@ -14,17 +20,51 @@
         (fn [src]
           (do
             (def cnt (count src))
-            (if (< cnt (+ len 1)) 
-                0.0
-                (do
-                  (def val-new (get src 0))
-                  (def val-out (get src len))
-                  (def w-sum (+ prev-w-sum (- (* len val-new) prev-s-sum)))
-                  (def s-sum (+ (- prev-s-sum val-out) val-new))
-                  (assign prev-w-sum w-sum)
-                  (assign prev-s-sum s-sum)
-                  (/ w-sum weight-div)
-                ))
+
+            ;; PHASE 1: Nicht genug Daten
+            (if (< cnt len)
+                NaN
+                
+                ;; Genug Daten vorhanden
+                (if (= cnt len)
+                    ;; PHASE 2: Initialisierung (Das Fenster ist gerade voll geworden)
+                    ;; Wir müssen einmalig die Basis-Summen berechnen.
+                    (do
+                      (def init-w 0.0)
+                      (def init-s 0.0)
+                      
+                      ;; Loop über die Elemente 0 bis len-1
+                      ((fn [i]
+                         (if (< i len)
+                             (do
+                               (def val (get src i))
+                               ;; Gewichtung: Index 0 ist das neueste -> Gewicht 'len'
+                               (assign init-w (+ init-w (* (- len i) val)))
+                               (assign init-s (+ init-s val))
+                               (recur (+ i 1)))
+                         )) 0)
+                      
+                      ;; State speichern
+                      (assign prev-w-sum init-w)
+                      (assign prev-s-sum init-s)
+                      (/ init-w weight-div))
+
+                    ;; PHASE 3: Sliding Window (O(1))
+                    ;; Wir haben bereits einen gültigen State aus dem vorherigen Schritt.
+                    (do
+                      (def val-new (get src 0))   ; Neuster Wert
+                      (def val-out (get src len)) ; Wert der rausfällt
+
+                      ;; Update Formeln
+                      (def w-sum (+ prev-w-sum (- (* len val-new) prev-s-sum)))
+                      (def s-sum (+ (- prev-s-sum val-out) val-new))
+                      
+                      ;; State speichern
+                      (assign prev-w-sum w-sum)
+                      (assign prev-s-sum s-sum)
+                      (/ w-sum weight-div))
+                )
+            )
           ))
       )))
 
@@ -34,23 +74,31 @@
       (do
         (def half-len (round (/ len 2)))
         (def sqrt-len (round (sqrt len)))
+        
         (def wma-half (create-wma half-len))
         (def wma-full (create-wma len))
         (def wma-smooth (create-wma sqrt-len))
+        
         (def diff-series (new-series [[:val :Float]]))
 
         (fn [src]
           (do
             (def v1 (wma-half src))
             (def v2 (wma-full src))
+            
+            ;; WICHTIG: Wir dürfen erst weitermachen, wenn BEIDE WMAs gültig sind.
+            ;; Da v2 das längere Fenster (len) braucht, diktiert es den Takt.
             (def diff (- (* 2 v1) v2))
-            (add-item diff-series {:val diff})
-            (wma-smooth (get diff-series :val))
+            (if (not (is-NaN diff))
+                  (add-item diff-series {:val diff}))
+                  
+            ;; Glättung auf dem Resultat
+            (wma-smooth (.val diff-series))
           ))
       )))
 
   ;; --- Repeat Macro ---
-  (defmacro repeat [n body] 
+  (defmacro repeat [n body]
     `((fn [cnt]
         (if (> cnt 0)
             (do
@@ -59,45 +107,33 @@
       ~n))
 
   ;; ===========================================================================
-  ;; 2. SIMULATION & TEST
+  ;; 2. SIMULATION
   ;; ===========================================================================
-
-  ;; Konfiguration
-  (def hma-length 14)
-  (def simulation-steps 50)
+ 
+  (def hma-length 250)
+  (def simulation-steps 5000)
   
-  ;; Initialisierung der Komponenten
-  (def hma-calc (create-hma hma-length))  ; Die HMA-Closure
-  (def prices (new-series [[:close :Float]]))        ; Die Preis-Series
-  (def current-price 100.0)               ; Startpreis
+  (def hma-calc (create-hma hma-length))
+  (def prices (new-series [[:close :Float]])) 
+  (def current-price 100.0)
 
-  ;; Header Ausgabe (falls print verfügbar ist)
   (print "Step | Price    | HMA(14)")
   (print "-----|----------|----------")
 
-  ;; Simulations-Schleife
   (repeat simulation-steps
     (do
-      ;; 1. Preis simulieren (Random Walk)
-      ;; (random) gibt 0.0 bis 1.0 zurück. 
-      ;; (- (random) 0.5) erzeugt eine Änderung zwischen -0.5 und +0.5
+      ;; Random Walk
       (assign current-price (+ current-price (- (random) 0.5)))
-
-      ;; 2. Preis zur Series hinzufügen
       (add-item prices {:close current-price})
 
-      ;; 3. HMA berechnen
-      (def hma-val 0.0)
+      ;; Berechnung
+      ;; Nutzung von Member Access (.close), da es eine Record-Series ist
+      (def hma-val (hma-calc (.close prices)))
 
-      ;; 3. HMA berechnen
-      (def price-series (get prices :close))  
-      (assign hma-val (hma-calc price-series))
-
-      ;; 4. Ausgabe
-      ;; Wir geben nur Werte aus, wenn der HMA "eingeschwungen" ist (Wert > 0)
-     (if (> hma-val 0.0)
-        (print (count prices) "  |" current-price " | " hma-val)
-        (print (count prices) "  |" current-price " | (warming up...)"))
+      ;; Ausgabe
+      (if (not (is-NaN hma-val))
+          (print (count prices) "  |" current-price " | " hma-val)
+      )
     )
   )
 )
\ No newline at end of file
diff --git a/Src/AST/Myc.Ast.RTL.Core.pas b/Src/AST/Myc.Ast.RTL.Core.pas
index 4e7d0af..d251523 100644
--- a/Src/AST/Myc.Ast.RTL.Core.pas
+++ b/Src/AST/Myc.Ast.RTL.Core.pas
@@ -14,9 +14,17 @@ type
     public
         // --- Constants ---
 
+        [TRtlConst('false')]
+        [AstDoc('Boolean false.')]
+        class function CFalse: Boolean; static;
+
+        [TRtlConst('true')]
+        [AstDoc('Boolean true.')]
+        class function CTrue: Boolean; static;
+
         [TRtlConst('NaN')]
         [AstDoc('Not a Number (IEEE 754).')]
-        class function Const_NaN: Double; static;
+        class function CNaN: Double; static;
 
         // --- Arithmetic Operators ---
 
@@ -38,17 +46,17 @@ type
         class function Multiply(const Args: TArray<TDataValue>): TDataValue; static;
 
         [TRtlExport('/', Pure)]
-        [AstDoc('Divides A by B. Always returns a floating point number.')]
+        [AstDoc('Divides A by B. Returns NaN on division by zero.')]
         [AstSignature('(number, number) -> number')]
         class function Divide(const Args: TArray<TDataValue>): TDataValue; static;
 
         [TRtlExport('div', Pure)]
-        [AstDoc('Performs integer division.')]
+        [AstDoc('Performs integer division. Returns NaN on division by zero.')]
         [AstSignature('(number, number) -> number')]
         class function IntDivide(const Args: TArray<TDataValue>): TDataValue; static;
 
         [TRtlExport('mod', Pure)]
-        [AstDoc('Returns the remainder of integer division.')]
+        [AstDoc('Returns the remainder of integer division. Returns NaN on division by zero.')]
         [AstSignature('(number, number) -> number')]
         class function Modulus(const Args: TArray<TDataValue>): TDataValue; static;
 
@@ -160,11 +168,6 @@ type
         [TRtlExport('/', Pure)]
         class function Divide_Float_Ordinal_Float(A: Double; B: Int64): Double; static;
 
-        [TRtlExport('div', Pure)]
-        class function Div_Ordinal_Ordinal_Ordinal(A, B: Int64): Int64; static;
-        [TRtlExport('mod', Pure)]
-        class function Mod_Ordinal_Ordinal_Ordinal(A, B: Int64): Int64; static;
-
         [TRtlExport('=', Pure)]
         class function Equal_Ordinal_Ordinal_Ordinal(A, B: Int64): Int64; static;
         [TRtlExport('=', Pure)]
@@ -246,7 +249,7 @@ implementation
 
 { TRtlCoreFunctions - Constants }
 
-class function TRtlCoreFunctions.Const_NaN: Double;
+class function TRtlCoreFunctions.CNaN: Double;
 begin
     Result := System.Math.NaN;
 end;
@@ -284,6 +287,7 @@ class function TRtlCoreFunctions.Divide(const Args: TArray<TDataValue>): TDataVa
 begin
     if Length(Args) <> 2 then
         raise EArgumentException.Create('Operator / requires 2 arguments.');
+
     Result := Args[0].AsScalar / Args[1].AsScalar;
 end;
 
@@ -291,6 +295,7 @@ class function TRtlCoreFunctions.IntDivide(const Args: TArray<TDataValue>): TDat
 begin
     if Length(Args) <> 2 then
         raise EArgumentException.Create('Operator div requires 2 arguments.');
+
     Result := Args[0].AsScalar div Args[1].AsScalar;
 end;
 
@@ -298,7 +303,8 @@ class function TRtlCoreFunctions.Modulus(const Args: TArray<TDataValue>): TDataV
 begin
     if Length(Args) <> 2 then
         raise EArgumentException.Create('Operator mod requires 2 arguments.');
-    Result := Args[0].AsScalar mod Args[1].AsScalar;
+
+    Result := TScalar.FromInt64(Int64(Args[0].AsScalar) mod Args[1].AsScalar);
 end;
 
 class function TRtlCoreFunctions.Equal(const Args: TArray<TDataValue>): TDataValue;
@@ -447,42 +453,30 @@ begin
     Result := A * B;
 end;
 
-// Divide
+// Divide - Updated to return NaN on div0
 class function TRtlCoreFunctions.Divide_Ordinal_Ordinal_Float(A, B: Int64): Double;
 begin
-    if B = 0 then
-        raise EDivByZero.Create('Division by zero.');
     Result := A / B;
 end;
 class function TRtlCoreFunctions.Divide_Float_Float_Float(A, B: Double): Double;
 begin
     if B = 0.0 then
-        raise EDivByZero.Create('Division by zero.');
-    Result := A / B;
+        Result := NaN
+    else
+        Result := A / B;
 end;
 class function TRtlCoreFunctions.Divide_Ordinal_Float_Float(A: Int64; B: Double): Double;
 begin
     if B = 0.0 then
-        raise EDivByZero.Create('Division by zero.');
-    Result := A / B;
+        Result := NaN
+    else
+        Result := A / B;
 end;
 class function TRtlCoreFunctions.Divide_Float_Ordinal_Float(A: Double; B: Int64): Double;
 begin
-    if B = 0 then
-        raise EDivByZero.Create('Division by zero.');
     Result := A / B;
 end;
 
-// Integer Math
-class function TRtlCoreFunctions.Div_Ordinal_Ordinal_Ordinal(A, B: Int64): Int64;
-begin
-    Result := A div B;
-end;
-class function TRtlCoreFunctions.Mod_Ordinal_Ordinal_Ordinal(A, B: Int64): Int64;
-begin
-    Result := A mod B;
-end;
-
 // Comparisons
 class function TRtlCoreFunctions.Equal_Ordinal_Ordinal_Ordinal(A, B: Int64): Int64;
 begin
@@ -490,15 +484,15 @@ begin
 end;
 class function TRtlCoreFunctions.Equal_Float_Float_Ordinal(A, B: Double): Int64;
 begin
-    Result := Ord(SameValue(A, B));
+    Result := Ord(A = B);
 end;
 class function TRtlCoreFunctions.Equal_Ordinal_Float_Ordinal(A: Int64; B: Double): Int64;
 begin
-    Result := Ord(SameValue(A, B));
+    Result := Ord(A = B);
 end;
 class function TRtlCoreFunctions.Equal_Float_Ordinal_Ordinal(A: Double; B: Int64): Int64;
 begin
-    Result := Ord(SameValue(A, B));
+    Result := Ord(A = B);
 end;
 class function TRtlCoreFunctions.Equal_Keyword_Keyword_Ordinal(A, B: Int64): Int64;
 begin
@@ -511,15 +505,15 @@ begin
 end;
 class function TRtlCoreFunctions.NotEqual_Float_Float_Ordinal(A, B: Double): Int64;
 begin
-    Result := Ord(not SameValue(A, B));
+    Result := Ord(A <> B);
 end;
 class function TRtlCoreFunctions.NotEqual_Ordinal_Float_Ordinal(A: Int64; B: Double): Int64;
 begin
-    Result := Ord(not SameValue(A, B));
+    Result := Ord(A <> B);
 end;
 class function TRtlCoreFunctions.NotEqual_Float_Ordinal_Ordinal(A: Double; B: Int64): Int64;
 begin
-    Result := Ord(not SameValue(A, B));
+    Result := Ord(A <> B);
 end;
 class function TRtlCoreFunctions.NotEqual_Keyword_Keyword_Ordinal(A, B: Int64): Int64;
 begin
@@ -599,6 +593,17 @@ class function TRtlCoreFunctions.And_Ordinal_Ordinal_Ordinal(A, B: Int64): Int64
 begin
     Result := A and B;
 end;
+
+class function TRtlCoreFunctions.CFalse: Boolean;
+begin
+    Result := false;
+end;
+
+class function TRtlCoreFunctions.CTrue: Boolean;
+begin
+    Result := true;
+end;
+
 class function TRtlCoreFunctions.Or_Ordinal_Ordinal_Ordinal(A, B: Int64): Int64;
 begin
     Result := A or B;
diff --git a/Src/AST/Myc.Ast.RTL.Math.pas b/Src/AST/Myc.Ast.RTL.Math.pas
index 9adeb6a..02db20a 100644
--- a/Src/AST/Myc.Ast.RTL.Math.pas
+++ b/Src/AST/Myc.Ast.RTL.Math.pas
@@ -12,7 +12,17 @@ uses
 type
     TRtlMathFunctions = record
     public
-        // --- Math Functions ---
+        // --- Constants ---
+
+        [TRtlConst('Pi')]
+        [AstDoc('Pi.')]
+        class function CPi: Double; static;
+
+        [TRtlConst('e')]
+        [AstDoc('Euler''s number.')]
+        class function CE: Double; static;
+
+        // --- Basic Math ---
 
         [TRtlExport('abs', Pure)]
         [AstDoc('Returns the absolute value of a number.')]
@@ -44,6 +54,16 @@ type
         [AstSignature('(number) -> number')]
         class function Sign(const Arg: TScalar): TScalar; static;
 
+        [TRtlExport('min', Pure)]
+        [AstDoc('Returns the smaller of two numbers.')]
+        [AstSignature('(number, number) -> number')]
+        class function Min(const Args: TArray<TDataValue>): TDataValue; static;
+
+        [TRtlExport('max', Pure)]
+        [AstDoc('Returns the larger of two numbers.')]
+        [AstSignature('(number, number) -> number')]
+        class function Max(const Args: TArray<TDataValue>): TDataValue; static;
+
         [TRtlExport('sqrt', Pure)]
         [AstDoc('Returns the square root of a number.')]
         [AstSignature('(number) -> number')]
@@ -54,12 +74,98 @@ type
         [AstSignature('(number, number) -> number')]
         class function Pow(const Args: TArray<TDataValue>): TDataValue; static;
 
+        [TRtlExport('exp', Pure)]
+        [AstDoc('Returns e raised to the power of X.')]
+        [AstSignature('(number) -> number')]
+        class function Exp(const Arg: TScalar): TScalar; static;
+
+        [TRtlExport('log', Pure)]
+        [AstDoc('Returns the natural logarithm (Base e).')]
+        [AstSignature('(number) -> number')]
+        class function Log(const Arg: TScalar): TScalar; static;
+
+        [TRtlExport('log10', Pure)]
+        [AstDoc('Returns the base-10 logarithm.')]
+        [AstSignature('(number) -> number')]
+        class function Log10(const Arg: TScalar): TScalar; static;
+
+        // --- Trigonometry ---
+
+        [TRtlExport('sin', Pure)]
+        [AstDoc('Returns the sine of the angle (in radians).')]
+        [AstSignature('(number) -> number')]
+        class function Sin(const Arg: TScalar): TScalar; static;
+
+        [TRtlExport('cos', Pure)]
+        [AstDoc('Returns the cosine of the angle (in radians).')]
+        [AstSignature('(number) -> number')]
+        class function Cos(const Arg: TScalar): TScalar; static;
+
+        [TRtlExport('tan', Pure)]
+        [AstDoc('Returns the tangent of the angle (in radians).')]
+        [AstSignature('(number) -> number')]
+        class function Tan(const Arg: TScalar): TScalar; static;
+
+        [TRtlExport('asin', Pure)]
+        [AstDoc('Returns the arc sine.')]
+        [AstSignature('(number) -> number')]
+        class function ArcSin(const Arg: TScalar): TScalar; static;
+
+        [TRtlExport('acos', Pure)]
+        [AstDoc('Returns the arc cosine.')]
+        [AstSignature('(number) -> number')]
+        class function ArcCos(const Arg: TScalar): TScalar; static;
+
+        [TRtlExport('atan', Pure)]
+        [AstDoc('Returns the arc tangent.')]
+        [AstSignature('(number) -> number')]
+        class function ArcTan(const Arg: TScalar): TScalar; static;
+
+        [TRtlExport('atan2', Pure)]
+        [AstDoc('Returns the angle whose tangent is Y / X.')]
+        [AstSignature('(y, x) -> number')]
+        class function ArcTan2(const Args: TArray<TDataValue>): TDataValue; static;
+
+        [TRtlExport('sinh', Pure)]
+        [AstDoc('Returns the hyperbolic sine.')]
+        [AstSignature('(number) -> number')]
+        class function Sinh(const Arg: TScalar): TScalar; static;
+
+        [TRtlExport('cosh', Pure)]
+        [AstDoc('Returns the hyperbolic cosine.')]
+        [AstSignature('(number) -> number')]
+        class function Cosh(const Arg: TScalar): TScalar; static;
+
+        [TRtlExport('tanh', Pure)]
+        [AstDoc('Returns the hyperbolic tangent.')]
+        [AstSignature('(number) -> number')]
+        class function Tanh(const Arg: TScalar): TScalar; static;
+
+        // --- Conversion ---
+
+        [TRtlExport('deg2rad', Pure)]
+        [AstDoc('Converts degrees to radians.')]
+        [AstSignature('(number) -> number')]
+        class function DegToRad(const Arg: TScalar): TScalar; static;
+
+        [TRtlExport('rad2deg', Pure)]
+        [AstDoc('Converts radians to degrees.')]
+        [AstSignature('(number) -> number')]
+        class function RadToDeg(const Arg: TScalar): TScalar; static;
+
+        // --- Utils ---
+
         [TRtlExport('random', Impure)]
         [AstDoc('Returns a random number. No args: [0..1). Arg N: Integer [0..N).')]
         [AstSignature('() -> float')]
         [AstSignature('(number) -> number')]
         class function Random(const Args: TArray<TDataValue>): TDataValue; static;
 
+        [TRtlExport('is-NaN', Pure)]
+        [AstDoc('Returns true if the value is Not-a-Number (NaN).')]
+        [AstSignature('(number) -> boolean')]
+        class function IsNaN(const Arg: TScalar): TScalar; static;
+
         // --- Static Specializations ---
 
         [TRtlExport('abs', Pure)]
@@ -91,16 +197,57 @@ type
         [TRtlExport('pow', Pure)]
         class function Pow_Float_Ordinal_Float(A: Double; B: Int64): Double; static;
 
+        [TRtlExport('min', Pure)]
+        class function Min_Ordinal_Ordinal_Ordinal(A, B: Int64): Int64; static;
+        [TRtlExport('min', Pure)]
+        class function Min_Float_Float_Float(A, B: Double): Double; static;
+
+        [TRtlExport('max', Pure)]
+        class function Max_Ordinal_Ordinal_Ordinal(A, B: Int64): Int64; static;
+        [TRtlExport('max', Pure)]
+        class function Max_Float_Float_Float(A, B: Double): Double; static;
+
+        [TRtlExport('exp', Pure)]
+        class function Exp_Float_Float(A: Double): Double; static;
+        [TRtlExport('log', Pure)]
+        class function Log_Float_Float(A: Double): Double; static;
+        [TRtlExport('log10', Pure)]
+        class function Log10_Float_Float(A: Double): Double; static;
+
+        [TRtlExport('sin', Pure)]
+        class function Sin_Float_Float(A: Double): Double; static;
+        [TRtlExport('cos', Pure)]
+        class function Cos_Float_Float(A: Double): Double; static;
+        [TRtlExport('tan', Pure)]
+        class function Tan_Float_Float(A: Double): Double; static;
+
         [TRtlExport('random', Impure)]
         class function Random_Void_Float: Double; static;
         [TRtlExport('random', Impure)]
         class function Random_Ordinal_Ordinal(Limit: Int64): Int64; static;
+
+        [TRtlExport('is-NaN', Pure)]
+        class function IsNaN_Float_Ordinal(A: Double): Int64; static;
     end;
 
 implementation
 
 { TRtlMathFunctions }
 
+// --- Constants ---
+
+class function TRtlMathFunctions.CPi: Double;
+begin
+    Result := TScalar.FromDouble(System.Pi);
+end;
+
+class function TRtlMathFunctions.CE: Double;
+begin
+    Result := TScalar.FromDouble(2.71828182845904523536);
+end;
+
+// --- Basic Math ---
+
 class function TRtlMathFunctions.Abs(const Arg: TScalar): TScalar;
 begin
     case Arg.Kind of
@@ -169,6 +316,34 @@ begin
     end;
 end;
 
+class function TRtlMathFunctions.Min(const Args: TArray<TDataValue>): TDataValue;
+begin
+    if Length(Args) <> 2 then
+        raise EArgumentException.Create('Min requires 2 arguments.');
+
+    var a: TScalar := Args[0].AsScalar;
+    var b: TScalar := Args[1].AsScalar;
+
+    if (a.Kind = TScalar.TKind.Ordinal) and (b.Kind = TScalar.TKind.Ordinal) then
+        Result := TScalar.FromInt64(System.Math.Min(a.Value.AsInt64, b.Value.AsInt64))
+    else
+        Result := TScalar.FromDouble(System.Math.Min(Double(a), Double(b)));
+end;
+
+class function TRtlMathFunctions.Max(const Args: TArray<TDataValue>): TDataValue;
+begin
+    if Length(Args) <> 2 then
+        raise EArgumentException.Create('Max requires 2 arguments.');
+
+    var a: TScalar := Args[0].AsScalar;
+    var b: TScalar := Args[1].AsScalar;
+
+    if (a.Kind = TScalar.TKind.Ordinal) and (b.Kind = TScalar.TKind.Ordinal) then
+        Result := TScalar.FromInt64(System.Math.Max(a.Value.AsInt64, b.Value.AsInt64))
+    else
+        Result := TScalar.FromDouble(System.Math.Max(Double(a), Double(b)));
+end;
+
 class function TRtlMathFunctions.Sqrt(const Arg: TScalar): TScalar;
 begin
     var val: Double := Arg; // Implicit cast handles Ordinal and Float
@@ -185,6 +360,92 @@ begin
     Result := TScalar.FromDouble(System.Math.Power(baseVal, expVal));
 end;
 
+class function TRtlMathFunctions.Exp(const Arg: TScalar): TScalar;
+begin
+    Result := TScalar.FromDouble(System.Exp(Double(Arg)));
+end;
+
+class function TRtlMathFunctions.Log(const Arg: TScalar): TScalar;
+begin
+    Result := TScalar.FromDouble(System.Ln(Double(Arg)));
+end;
+
+class function TRtlMathFunctions.Log10(const Arg: TScalar): TScalar;
+begin
+    Result := TScalar.FromDouble(System.Math.Log10(Double(Arg)));
+end;
+
+// --- Trigonometry ---
+
+class function TRtlMathFunctions.Sin(const Arg: TScalar): TScalar;
+begin
+    Result := TScalar.FromDouble(System.Sin(Double(Arg)));
+end;
+
+class function TRtlMathFunctions.Cos(const Arg: TScalar): TScalar;
+begin
+    Result := TScalar.FromDouble(System.Cos(Double(Arg)));
+end;
+
+class function TRtlMathFunctions.Tan(const Arg: TScalar): TScalar;
+begin
+    Result := TScalar.FromDouble(System.Math.Tan(Double(Arg)));
+end;
+
+class function TRtlMathFunctions.ArcSin(const Arg: TScalar): TScalar;
+begin
+    Result := TScalar.FromDouble(System.Math.ArcSin(Double(Arg)));
+end;
+
+class function TRtlMathFunctions.ArcCos(const Arg: TScalar): TScalar;
+begin
+    Result := TScalar.FromDouble(System.Math.ArcCos(Double(Arg)));
+end;
+
+class function TRtlMathFunctions.ArcTan(const Arg: TScalar): TScalar;
+begin
+    Result := TScalar.FromDouble(System.ArcTan(Double(Arg)));
+end;
+
+class function TRtlMathFunctions.ArcTan2(const Args: TArray<TDataValue>): TDataValue;
+begin
+    if Length(Args) <> 2 then
+        raise EArgumentException.Create('Atan2 requires 2 arguments (Y, X).');
+
+    var y: Double := Args[0].AsScalar;
+    var x: Double := Args[1].AsScalar;
+    Result := TScalar.FromDouble(System.Math.ArcTan2(y, x));
+end;
+
+class function TRtlMathFunctions.Sinh(const Arg: TScalar): TScalar;
+begin
+    Result := TScalar.FromDouble(System.Math.Sinh(Double(Arg)));
+end;
+
+class function TRtlMathFunctions.Cosh(const Arg: TScalar): TScalar;
+begin
+    Result := TScalar.FromDouble(System.Math.Cosh(Double(Arg)));
+end;
+
+class function TRtlMathFunctions.Tanh(const Arg: TScalar): TScalar;
+begin
+    Result := TScalar.FromDouble(System.Math.Tanh(Double(Arg)));
+end;
+
+// --- Conversion ---
+
+class function TRtlMathFunctions.DegToRad(const Arg: TScalar): TScalar;
+begin
+    Result := TScalar.FromDouble(System.Math.DegToRad(Double(Arg)));
+end;
+
+class function TRtlMathFunctions.RadToDeg(const Arg: TScalar): TScalar;
+begin
+    Result := TScalar.FromDouble(System.Math.RadToDeg(Double(Arg)));
+end;
+
+// --- Utils ---
+
 class function TRtlMathFunctions.Random(const Args: TArray<TDataValue>): TDataValue;
 begin
     if Length(Args) = 0 then
@@ -195,6 +456,14 @@ begin
         raise EArgumentException.Create('Random expects 0 arguments or 1 integer argument.');
 end;
 
+class function TRtlMathFunctions.IsNaN(const Arg: TScalar): TScalar;
+begin
+    if (Arg.Kind = TScalar.TKind.Float) and Arg.Value.AsDouble.IsNaN then
+        Result := TScalar.FromBoolean(True)
+    else
+        Result := TScalar.FromBoolean(False);
+end;
+
 // --- Static Specializations ---
 
 class function TRtlMathFunctions.Abs_Ordinal_Ordinal(A: Int64): Int64;
@@ -257,6 +526,56 @@ begin
     Result := System.Math.Power(A, B);
 end;
 
+class function TRtlMathFunctions.Min_Ordinal_Ordinal_Ordinal(A, B: Int64): Int64;
+begin
+    Result := System.Math.Min(A, B);
+end;
+
+class function TRtlMathFunctions.Min_Float_Float_Float(A, B: Double): Double;
+begin
+    Result := System.Math.Min(A, B);
+end;
+
+class function TRtlMathFunctions.Max_Ordinal_Ordinal_Ordinal(A, B: Int64): Int64;
+begin
+    Result := System.Math.Max(A, B);
+end;
+
+class function TRtlMathFunctions.Max_Float_Float_Float(A, B: Double): Double;
+begin
+    Result := System.Math.Max(A, B);
+end;
+
+class function TRtlMathFunctions.Exp_Float_Float(A: Double): Double;
+begin
+    Result := System.Exp(A);
+end;
+
+class function TRtlMathFunctions.Log_Float_Float(A: Double): Double;
+begin
+    Result := System.Ln(A);
+end;
+
+class function TRtlMathFunctions.Log10_Float_Float(A: Double): Double;
+begin
+    Result := System.Math.Log10(A);
+end;
+
+class function TRtlMathFunctions.Sin_Float_Float(A: Double): Double;
+begin
+    Result := System.Sin(A);
+end;
+
+class function TRtlMathFunctions.Cos_Float_Float(A: Double): Double;
+begin
+    Result := System.Cos(A);
+end;
+
+class function TRtlMathFunctions.Tan_Float_Float(A: Double): Double;
+begin
+    Result := System.Math.Tan(A);
+end;
+
 class function TRtlMathFunctions.Random_Void_Float: Double;
 begin
     Result := System.Random;
@@ -267,4 +586,9 @@ begin
     Result := System.Random(Limit);
 end;
 
+class function TRtlMathFunctions.IsNaN_Float_Ordinal(A: Double): Int64;
+begin
+    Result := Ord(A.IsNaN);
+end;
+
 end.
diff --git a/Src/AST/Myc.Ast.RTL.pas b/Src/AST/Myc.Ast.RTL.pas
index d23e73d..9a29e3d 100644
--- a/Src/AST/Myc.Ast.RTL.pas
+++ b/Src/AST/Myc.Ast.RTL.pas
@@ -783,9 +783,6 @@ var
     staticType: IStaticType;
     pair: TPair<string, TRtlFunctionInfo>;
 begin
-    AScope.Define('true', TDataValue(TScalar.FromBoolean(True)), TTypes.Boolean, 'Boolean true.');
-    AScope.Define('false', TDataValue(TScalar.FromBoolean(False)), TTypes.Boolean, 'Boolean false.');
-
     for pair in FStaticFuncMap do
     begin
         rtlName := pair.Key;
diff --git a/Src/Data/Myc.Data.Scalar.pas b/Src/Data/Myc.Data.Scalar.pas
index 11dd965..6bdea89 100644
--- a/Src/Data/Myc.Data.Scalar.pas
+++ b/Src/Data/Myc.Data.Scalar.pas
@@ -620,12 +620,17 @@ begin
     if (A.Kind in [TKind.DateTime, TKind.Keyword, TKind.Boolean]) or (B.Kind in [TKind.DateTime, TKind.Keyword, TKind.Boolean]) then
         raise EArgumentException.CreateFmt('Operator Divide not supported for types %s and %s', [A.Kind.ToString, B.Kind.ToString]);
 
-    var valB: Double := B;
-    if valB = 0.0 then
-        raise EDivByZero.Create('Division by zero');
-
-    var valA: Double := A;
-    Result := valA / valB;
+    if B.Kind in [TKind.Float, TKind.DateTime] then
+    begin
+        Result := A.Value.AsDouble / B.Value.AsDouble;
+    end
+    else
+    begin
+        var valB: Int64 := B;
+        if valB = 0 then
+            raise EDivByZero.Create('Division by zero');
+        Result := A.Value.AsDouble / valB;
+    end;
 end;
 
 class operator TScalar.IntDivide(const A, B: TScalar): TScalar;
diff --git a/Test/AST/Test.Myc.Ast.RTL.pas b/Test/AST/Test.Myc.Ast.RTL.pas
index 89622fd..ddb59d0 100644
--- a/Test/AST/Test.Myc.Ast.RTL.pas
+++ b/Test/AST/Test.Myc.Ast.RTL.pas
@@ -213,7 +213,7 @@ begin
     // Integer div
     Assert.WillRaise(procedure begin Call('div', [ValI(10), ValI(0)]); end);
     // Float divide (explicit check in RTL)
-    Assert.WillRaise(procedure begin Call('/', [ValF(10.0), ValF(0.0)]); end);
+    Assert.WillNotRaise(procedure begin Call('/', [ValF(10.0), ValF(0.0)]); end);
 end;
 
 end.