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Timeline for Proofs of Poincaré duality

Current License: CC BY-SA 4.0

12 events
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Apr 29 at 14:01 history became hot network question
Apr 29 at 13:48 answer added Ian Agol timeline score: 8
Apr 29 at 7:10 answer added Greg Friedman timeline score: 10
Apr 28 at 18:17 history edited YCor CC BY-SA 4.0
removed capitals from title
Apr 28 at 18:14 answer added Connor Malin timeline score: 16
Apr 28 at 8:46 comment added Sebastian Goette Poincare duality can also be derived from Spanier-Whitehead duality, see for example Switzer's book, Theorem 14.13.
Apr 27 at 23:53 comment added KhashF Related mathoverflow.net/a/401691/128556
Apr 27 at 18:00 comment added Marco Golla It would also be nice to know the advantages/disadvantages of each of the proofs mentioned (in the question and in the answers).
Apr 27 at 4:52 comment added KhashF There is a proof via Morse Theory.
Apr 27 at 4:27 history edited LSpice CC BY-SA 4.0
Poincare -> Poincaré
S Apr 27 at 2:55 review First questions
Apr 27 at 3:58
S Apr 27 at 2:55 history asked Misha CC BY-SA 4.0