Mirror Plane

The Symmetry Operation , etc., which is equivalent to , where the bar denotes anImproper Rotation.

• Semiflow
• Semigroup
• Semi-Integral
• Semilatus Rectum
• Semimagic Square
• Semimajor Axis
• Semiminor Axis
• Semiperfect Magic Cube
• Semiperfect Number
• Semiperimeter
• Semiprime
• Semiprime Ring
• Semiregular Polyhedron
• Semiring
• Andrews-Curtis Link
• Andrews-Schur Identity
• Andrew's Sine
• Andrica's Conjecture
• André's Problem
• André's Reflection Method
• Anger Function
• Angle
• Angle Bisector
• Angle Bisector Theorem
• Angle Bracket