diff --git a/kmath-geometry/src/commonMain/kotlin/space/kscience/kmath/geometry/Projections.kt b/kmath-geometry/src/commonMain/kotlin/space/kscience/kmath/geometry/Projections.kt
index d13ef03a1..205bc17e7 100644
--- a/kmath-geometry/src/commonMain/kotlin/space/kscience/kmath/geometry/Projections.kt
+++ b/kmath-geometry/src/commonMain/kotlin/space/kscience/kmath/geometry/Projections.kt
@@ -1,7 +1,7 @@
 package space.kscience.kmath.geometry
 
 /**
- * Project vector to a line
+ * Project vector onto a line.
  * @param vector to project
  * @param line line to which vector should be projected
  */
@@ -10,8 +10,8 @@ public fun <V : Vector> GeometrySpace<V>.projectToLine(vector: V, line: Line<V>)
 }
 
 /**
- * Project vector to a hyper-plane, which is defined by a normal and base
- * In 2d case it is projection to a line, in 3d case it is projection to a plane
+ * Project vector onto a hyperplane, which is defined by a normal and base.
+ * In 2D case it is the projection to a line, in 3d case it is the one to a plane.
  * @param vector to project
  * @param normal normal (perpendicular) vector to a hyper-plane to which vector should be projected
  * @param base point belonging to a hyper-plane to which vector should be projected
diff --git a/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Euclidean2DSpaceTest.kt b/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Euclidean2DSpaceTest.kt
index 6d5ae9948..5913b2fa9 100644
--- a/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Euclidean2DSpaceTest.kt
+++ b/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Euclidean2DSpaceTest.kt
@@ -6,7 +6,7 @@ import kotlin.test.assertEquals
 
 internal class Euclidean2DSpaceTest {
     @Test
-    fun getZero() {
+    fun zero() {
         assertVectorEquals(Vector2D(0.0, 0.0), Euclidean2DSpace.zero)
     }
 
@@ -59,4 +59,4 @@ internal class Euclidean2DSpaceTest {
             assertVectorEquals(Vector2D(300.0, 0.0003), Vector2D(100.0, 0.0001) * 3)
         }
     }
-}
\ No newline at end of file
+}
diff --git a/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Euclidean3DSpaceTest.kt b/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Euclidean3DSpaceTest.kt
index 9cce44c65..2c74cbd27 100644
--- a/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Euclidean3DSpaceTest.kt
+++ b/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Euclidean3DSpaceTest.kt
@@ -5,7 +5,7 @@ import kotlin.test.assertEquals
 
 internal class Euclidean3DSpaceTest {
     @Test
-    fun getZero() {
+    fun zero() {
         assertVectorEquals(Vector3D(0.0, 0.0, 0.0), Euclidean3DSpace.zero)
     }
 
@@ -71,4 +71,4 @@ internal class Euclidean3DSpaceTest {
             assertVectorEquals(Vector3D(2.0, -4.0, 0.0), Vector3D(1.0, -2.0, 0.0) * 2)
         }
     }
-}
\ No newline at end of file
+}
diff --git a/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/ProjectionAlongTest.kt b/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/ProjectionAlongTest.kt
index 78ce98dc4..65291ee4e 100644
--- a/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/ProjectionAlongTest.kt
+++ b/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/ProjectionAlongTest.kt
@@ -58,4 +58,4 @@ internal class ProjectionAlongTest {
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/ProjectionOntoLineTest.kt b/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/ProjectionOntoLineTest.kt
index ec74ff59b..0f74e1efb 100644
--- a/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/ProjectionOntoLineTest.kt
+++ b/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/ProjectionOntoLineTest.kt
@@ -80,4 +80,4 @@ internal class ProjectionOntoLineTest {
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Vector2DTest.kt b/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Vector2DTest.kt
index 647004f43..84b1f4fd6 100644
--- a/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Vector2DTest.kt
+++ b/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Vector2DTest.kt
@@ -9,7 +9,7 @@ internal class Vector2DTest {
     private val vector = Vector2D(1.0, -7.999)
 
     @Test
-    fun getSize() {
+    fun size() {
         assertEquals(2, vector.size)
     }
 
@@ -20,17 +20,17 @@ internal class Vector2DTest {
     }
 
     @Test
-    operator fun iterator() {
+    fun iterator() {
         assertEquals(listOf(1.0, -7.999), vector.toList())
     }
 
     @Test
-    fun getX() {
+    fun x() {
         assertEquals(1.0, vector.x)
     }
 
     @Test
-    fun getY() {
+    fun y() {
         assertEquals(-7.999, vector.y)
     }
-}
\ No newline at end of file
+}
diff --git a/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Vector3DTest.kt b/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Vector3DTest.kt
index 83271160f..717e78871 100644
--- a/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Vector3DTest.kt
+++ b/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/Vector3DTest.kt
@@ -8,7 +8,7 @@ internal class Vector3DTest {
     private val vector = Vector3D(1.0, -7.999, 0.001)
 
     @Test
-    fun getSize() {
+    fun size() {
         assertEquals(3, vector.size)
     }
 
@@ -20,22 +20,22 @@ internal class Vector3DTest {
     }
 
     @Test
-    operator fun iterator() {
+    fun iterator() {
         assertEquals(listOf(1.0, -7.999, 0.001), vector.toList())
     }
 
     @Test
-    fun getX() {
+    fun x() {
         assertEquals(1.0, vector.x)
     }
 
     @Test
-    fun getY() {
+    fun y() {
         assertEquals(-7.999, vector.y)
     }
 
     @Test
-    fun getZ() {
+    fun z() {
         assertEquals(0.001, vector.z)
     }
-}
\ No newline at end of file
+}
diff --git a/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/testUtils.kt b/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/testUtils.kt
index 773d6d90c..1277c0130 100644
--- a/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/testUtils.kt
+++ b/kmath-geometry/src/commonTest/kotlin/space/kscience/kmath/geometry/testUtils.kt
@@ -20,22 +20,22 @@ fun grid(
     return xs.flatMap { x -> ys.map { y -> x to y } }
 }
 
-fun assertVectorEquals(expected: Vector2D, actual: Vector2D, eps: Double = 1e-6) {
-    assertEquals(expected.x, actual.x, eps)
-    assertEquals(expected.y, actual.y, eps)
+fun assertVectorEquals(expected: Vector2D, actual: Vector2D, absoluteTolerance: Double = 1e-6) {
+    assertEquals(expected.x, actual.x, absoluteTolerance)
+    assertEquals(expected.y, actual.y, absoluteTolerance)
 }
 
-fun assertVectorEquals(expected: Vector3D, actual: Vector3D, eps: Double = 1e-6) {
-    assertEquals(expected.x, actual.x, eps)
-    assertEquals(expected.y, actual.y, eps)
-    assertEquals(expected.z, actual.z, eps)
+fun assertVectorEquals(expected: Vector3D, actual: Vector3D, absoluteTolerance: Double = 1e-6) {
+    assertEquals(expected.x, actual.x, absoluteTolerance)
+    assertEquals(expected.y, actual.y, absoluteTolerance)
+    assertEquals(expected.z, actual.z, absoluteTolerance)
 }
 
-fun <V : Vector> GeometrySpace<V>.isCollinear(a: V, b: V, eps: Double = 1e-6): Boolean {
+fun <V : Vector> GeometrySpace<V>.isCollinear(a: V, b: V, absoluteTolerance: Double = 1e-6): Boolean {
     val aDist = a.distanceTo(zero)
     val bDist = b.distanceTo(zero)
-    return abs(aDist) < eps || abs(bDist) < eps || abs(abs((a dot b) / (aDist * bDist)) - 1) < eps
+    return abs(aDist) < absoluteTolerance || abs(bDist) < absoluteTolerance || abs(abs((a dot b) / (aDist * bDist)) - 1) < absoluteTolerance
 }
 
-fun <V : Vector> GeometrySpace<V>.isOrthogonal(a: V, b: V, eps: Double = 1e-6): Boolean =
-    abs(a dot b) < eps
+fun <V : Vector> GeometrySpace<V>.isOrthogonal(a: V, b: V, absoluteTolerance: Double = 1e-6): Boolean =
+    abs(a dot b) < absoluteTolerance