Take a guided tour of the Euler characteristic, the resilient topological invariant that remains the same under bending and stretching. We'll trace its history—from Morolico and Euler to Cauchy—and explore how it counts building blocks in CW complexes, distinguishes a sphere from a torus, and extends to higher-dimensional spaces and even cosmology.

Note:  This podcast was AI-generated, and sometimes AI can make mistakes.  Please double-check any critical information.

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