Top network posts

• 49 Synthetic vs. classical differential geometry
• 33 Constructive algebraic geometry
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• 25 Examples of Kan extensions, adjunctions, and (co)monads in analysis, Lie theory, and differential geometry?
• 25 Why/How does the determinant of the Hessian matrix, combined with the 2nd derivatives, tell us max., min., saddle points? Reasoning behind it?
• 23 Are there any objects which aren't sets?
• 20 Is there a useful theory of D-modules on smooth (non-analytic) manifolds?
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