ReflectionTransform[v] gives a TransformationFunction that represents a reflection in a mirror through the origin, normal to the vector v.
ReflectionTransform[v, p]gives a reflection in a mirror through the point p, normal to the vector v.
Reflection in the line:
Reflection in the plane:
ReflectionMatrix TransformationMatrix TransformationFunction RotationTransform TranslationTransform ScalingTransform
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