Allen
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Registered User
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Jun 7 |
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One question on first Stiefel-Whitney class Thanks Will. As we know, $w_{1}(L)$ goes to the first Chern class of the complexfication of $L$ under the above Bockstein homomorphism. My original motivation is when $c_{1}(L_{\mathbb{C}})=0$ implies $w_{1}(L)=0$. |
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Jun 7 |
awarded | ● Editor |
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Jun 7 |
revised |
One question on first Stiefel-Whitney class added 8 characters in body |
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Jun 7 |
asked | One question on first Stiefel-Whitney class |
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Jun 6 |
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One question on cup product and torsion elements Thanks Allen. Your example is really helpful. |
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Jun 6 |
awarded | ● Scholar |
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Jun 6 |
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One question on cup product and torsion elements Thanks Tyler, I really appreciate your answer. |
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Jun 6 |
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One question on cup product and torsion elements Sorry, I always mean nonzero torsion element here. |
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Jun 6 |
asked | One question on cup product and torsion elements |
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May 8 |
awarded | ● Commentator |
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May 8 |
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Classification of higher dimensional manifolds Thanks for your reminding, Danny. I always mean classification up to homeomorphism instead of diffeomorphism. |
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May 7 |
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Classification of higher dimensional manifolds Hi,Scott. You mean his book: Algebraic and Geometric Surgery ? |
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May 7 |
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Classification of higher dimensional manifolds Ryan, I found a good ref called "A guide to the classication of manifolds" by M. Kreck. It indicates the 3-connected closed 8-manifold already could be quite complicated. You can google "surveys on surgery theory" and the first PDF contains this paper. |
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May 6 |
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Classification of higher dimensional manifolds Thanks Danny. I have tried Wall's paper. But it seems not that clear to me. Meanwhile the paper did not give a classification when n is even, I suspect. |
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May 6 |
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Classification of higher dimensional manifolds Not yet. Thanks for the comments. |
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May 6 |
asked | Classification of higher dimensional manifolds |
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Jan 5 |
asked | About the MacMahon functions on dimensions bigger than Three |
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Dec 31 |
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(geometric/intuitive) interpretation of ext The first ext group of two modules(sheaves) can be explictly understood as the set of elements which fit with the given two modules into a short exact sequence (ref. Griffith Harris). For higher ext we have similar construction by going to a diagram of short exact sequences. |
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Dec 31 |
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Example of special Lagrangian fibration of compact CY3? Mark Gross is an expert in this field. By the way, as far as I know consturcting a special Lag submanifold on a compact CY3 is too difficult, not to say you want a special Lag fibration. This is the reason why many people now only consider Lag fibration for the purpose of mirror symmetry. |
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Dec 31 |
asked | Universal family of Hibert shemes of Points |
