An extract from Witten's TQFT's paper of 88. He explains his reasons for calling the solutions to the anti-self-dual equations as instantons. Nowadays the solutions of the opposite equation corresponding to self-dual gauge fields are called anti-instantons, for obvious reasons.
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These are some videos from a Birthday conference for Thom, with very interesting talks.
Chern advocates for stratified manifolds as "new clothing for differential geometry" in this video.
This is an exposition of Baum on his work with MacPherson, Fulton, Quart on Lefschetz Riemann Roch formulas on singular varieties.
Been working on the Archimedes-Duistermaat-Heckman theorem for stratified pseudomanifolds, and the clip below somehow hits differently now.
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