Posts tagged parallel postulate
Chasing the Parallel Postulate
If you’d like to see these again, you’d better accept the parallel postulate. Image: Webber, via Wikimedia Commons.
Euclidean geometry, codified around 300 BCE by Euclid of Alexandria in one of the most influential textbooks in history, is based on 23 definitions, 5 postulates, and 5 axioms, or “common notions.” But as [...]
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