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For questions seeking recommendations for online mathematics resources that are useful at a research level.

4 votes

Video lectures of mathematics courses available online for free

30 lectures on Lie Groups, Representation theory and Symmetric Spaces by Wolfgang Ziller, UPenn 27 lectures on Algebraic Topology by Pierre Albin, University of Illinois 36 lectures on Topology & Geo …
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3 votes

Errata database?

I have created a web page recently. If you know about any Errata (official or unofficial) leave a comment here after checking it in mathbookserrata.
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