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Inverse blackboard

Inverse blackboard Christian Perfect and David Cushing spent the morning computing inverses using their special inverse blackboard.

Going left-to-right and top-to-bottom, we have:

  • The inverse of a 2×2 matrix;
  • The commutative diagram for the universal property of the inverse limit;
  • A variable which is inversely proportional to another;
  • The inverse of a complex number;
  • The derivative of the inverse of a function;
  • The inverse tangent of 1;
  • The axiom for group inverses;
  • Part of the definition of the logical inverse.

Thanks Christian and David for this wonderful idea!

 

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  1. Pingback: ScienceSeeker Editors’ Selections: October 27-November 2, 2013 | ScienceSeeker Blog

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