Christian Clason
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Registered User
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Feb 7 |
awarded | ● Enthusiast |
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Jan 14 |
comment |
Difference between ‘generalized gradient’ and ‘subgradient’ ? I would also recommend Winfried Schirotzek's very nice book [Nonsmooth Analysis](springer.com/mathematics/analysis/book/…), which comprehensively covers many generalized differentials and their relations (in infinite dimensions). |
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Jan 10 |
comment |
Derivative indicator function Could you add a bit more details? For example, it is important what you mean by indicator function -- the standard definition I know is extended-real-valued, and hence has no derivative in the sense of classical analysis. There are other derivative concepts that are applicable here, but it would help to know the context of this question. |
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Jan 10 |
accepted | reference for “X compact <=> C_b(X) separable” (X metric space) |
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Jan 10 |
comment |
reference for “X compact <=> C_b(X) separable” (X metric space) Well, a proof should not only convince the reader that a statement is true, but also explain why it is true. For the former, an appeal to authority (like a reference to an exercise in D&S) is sufficient, but the latter requires pointing the reader to a full proof. That's why I did not think my first reply was a full answer. (Also, the references were suggested by others and I just checked them, so it seemed wrong to harvest the rep for them.) |
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Jan 9 |
awarded | ● Editor |
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Jan 9 |
revised |
reference for “X compact <=> C_b(X) separable” (X metric space) added 4 characters in body; added 35 characters in body |
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Jan 9 |
awarded | ● Supporter |
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Jan 9 |
awarded | ● Teacher |
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Jan 9 |
answered | reference for “X compact <=> C_b(X) separable” (X metric space) |
