Spooky Math Story: Collapsed Symmetry Group
I looked in the mirror. It was empty. 'Your symmetry group is collapsed. No reflection for you anymore.' I turned. It was another me, a symmetric me, with a long thin knife in each hand.
Content note: Knives (mild horror).
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Free for classrooms, worksheets, slides and other non-commercial use under CC BY-NC 4.0, with credit to Ben Orlin.
Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2017-10-25-the-world-s-spookiest-math-stories--spooky-math-story-collapsed-symmetry-group/ (CC BY-NC 4.0)Transcript
I looked in the mirror. It was empty. 'Your symmetry group is collapsed. No reflection for you anymore.' I turned. It was another me, a symmetric me, with a long thin knife in each hand.