diff --git a/Hypercube.Client/Graphics/Viewports/Camera2D.cs b/Hypercube.Client/Graphics/Viewports/Camera2D.cs
index 086d7a5..db678db 100644
--- a/Hypercube.Client/Graphics/Viewports/Camera2D.cs
+++ b/Hypercube.Client/Graphics/Viewports/Camera2D.cs
@@ -1,5 +1,6 @@
 using Hypercube.Mathematics;
 using Hypercube.Mathematics.Matrices;
+using Hypercube.Mathematics.Quaternions;
 using Hypercube.Mathematics.Transforms;
 using Hypercube.Mathematics.Vectors;
 
diff --git a/Hypercube.Mathematics/Extensions/FloatingPointEqualsExtension.cs b/Hypercube.Mathematics/Extensions/FloatingPointEqualsExtension.cs
index b8e83cb..c1824ea 100644
--- a/Hypercube.Mathematics/Extensions/FloatingPointEqualsExtension.cs
+++ b/Hypercube.Mathematics/Extensions/FloatingPointEqualsExtension.cs
@@ -1,16 +1,17 @@
-namespace Hypercube.Mathematics.Extensions;
+using JetBrains.Annotations;
 
+namespace Hypercube.Mathematics.Extensions;
+
+[PublicAPI]
 public static class FloatingPointEqualsExtension
 {
-    public static bool AboutEquals(this double a, double b, double tolerance = 1E-15d)
+    public static bool AboutEquals(this float a, float b, float tolerance = 1E-15f)
     {
-        var epsilon = System.Math.Max(System.Math.Abs(a), System.Math.Abs(b)) * 1E-15d;
-        return System.Math.Abs(a - b) <= epsilon;
+        return HyperMath.AboutEquals(a, b, tolerance);
     }
-    
-    public static bool AboutEquals(this float a, float b, float tolerance = 1E-15f)
+
+    public static bool AboutEquals(this double a, double b, double tolerance = 1E-15d)
     {
-        var epsilon = System.Math.Max(System.Math.Abs(a), System.Math.Abs(b)) * tolerance ;
-        return System.Math.Abs(a - b) <= epsilon;
+        return HyperMath.AboutEquals(a, b, tolerance);
     }
 }
\ No newline at end of file
diff --git a/Hypercube.Mathematics/HyperMath.cs b/Hypercube.Mathematics/HyperMath.cs
index aa6ab1c..8d2d72a 100644
--- a/Hypercube.Mathematics/HyperMath.cs
+++ b/Hypercube.Mathematics/HyperMath.cs
@@ -34,7 +34,19 @@ public static class HyperMath
 
     public const float RadiansToDegreesF = 180 / PIf;
     public const float DegreesToRadiansF = PIf / 180;
-    
+
+    public static bool AboutEquals(float a, float b, float tolerance = 1E-15f)
+    {
+        var epsilon = Math.Max(Math.Abs(a), Math.Abs(b)) * tolerance ;
+        return Math.Abs(a - b) <= epsilon;
+    }
+
+    public static bool AboutEquals(double a, double b, double tolerance = 1E-15d)
+    {
+        var epsilon = Math.Max(Math.Abs(a), Math.Abs(b)) * tolerance;
+        return Math.Abs(a - b) <= epsilon;
+    }
+
     public static byte MoveTowards(byte current, byte target, byte distance)
     {
         return current < target ?
diff --git a/Hypercube.Mathematics/Matrices/Matrix4X4.cs b/Hypercube.Mathematics/Matrices/Matrix4X4.cs
index 06b1eae..e6529ac 100644
--- a/Hypercube.Mathematics/Matrices/Matrix4X4.cs
+++ b/Hypercube.Mathematics/Matrices/Matrix4X4.cs
@@ -1,5 +1,6 @@
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
+using Hypercube.Mathematics.Quaternions;
 using Hypercube.Mathematics.Shapes;
 using Hypercube.Mathematics.Transforms;
 using Hypercube.Mathematics.Vectors;
diff --git a/Hypercube.Mathematics/Quaternion.cs b/Hypercube.Mathematics/Quaternions/Quaternion.cs
similarity index 98%
rename from Hypercube.Mathematics/Quaternion.cs
rename to Hypercube.Mathematics/Quaternions/Quaternion.cs
index 7c62ad3..559424e 100644
--- a/Hypercube.Mathematics/Quaternion.cs
+++ b/Hypercube.Mathematics/Quaternions/Quaternion.cs
@@ -1,10 +1,11 @@
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using Hypercube.Mathematics.Vectors;
+using JetBrains.Annotations;
 
-namespace Hypercube.Mathematics;
+namespace Hypercube.Mathematics.Quaternions;
 
-[StructLayout(LayoutKind.Sequential)]
+[PublicAPI, StructLayout(LayoutKind.Sequential)]
 public readonly struct Quaternion : IEquatable<Quaternion> 
 {
     private const float SingularityThreshold = 0.4999995f;
diff --git a/Hypercube.Mathematics/Transforms/Transform2.Compatibility.cs b/Hypercube.Mathematics/Transforms/Transform2.Compatibility.cs
index 723ae94..e856b2a 100644
--- a/Hypercube.Mathematics/Transforms/Transform2.Compatibility.cs
+++ b/Hypercube.Mathematics/Transforms/Transform2.Compatibility.cs
@@ -1,4 +1,5 @@
 using System.Runtime.CompilerServices;
+using Hypercube.Mathematics.Quaternions;
 using Hypercube.Mathematics.Vectors;
 
 namespace Hypercube.Mathematics.Transforms;
diff --git a/Hypercube.Mathematics/Transforms/Transform3.cs b/Hypercube.Mathematics/Transforms/Transform3.cs
index b53abed..3fc3793 100644
--- a/Hypercube.Mathematics/Transforms/Transform3.cs
+++ b/Hypercube.Mathematics/Transforms/Transform3.cs
@@ -1,4 +1,5 @@
 using Hypercube.Mathematics.Matrices;
+using Hypercube.Mathematics.Quaternions;
 using Hypercube.Mathematics.Vectors;
 
 namespace Hypercube.Mathematics.Transforms;
diff --git a/Hypercube.UnitTests/Mathematics/Quaternions/QuaternionTest.cs b/Hypercube.UnitTests/Mathematics/Quaternions/QuaternionTest.cs
index 59ba1fc..6715234 100644
--- a/Hypercube.UnitTests/Mathematics/Quaternions/QuaternionTest.cs
+++ b/Hypercube.UnitTests/Mathematics/Quaternions/QuaternionTest.cs
@@ -1,4 +1,5 @@
 using Hypercube.Mathematics;
+using Hypercube.Mathematics.Quaternions;
 using Hypercube.Mathematics.Vectors;
 
 namespace Hypercube.UnitTests.Mathematics.Quaternions;