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# Questions

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### When is a Homology Class Represented by a Submanifold? [closed]

feb 12 12 at 0:52 unknown (google) 5,540629

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### Which cluster algebras have been categorified?

may 30 11 at 2:48 Hugh Thomas 2,161514

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### Defining Quotient Bundles

jun 8 10 at 12:11 David Carchedi 7,7471027

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### Why does (Ribbon) Graph (co)Homology Compute (co)Homology of MCG?

jan 15 11 at 0:55 Romeo 1,816217

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### Penner’s formula for volume of the Moduli Space

feb 11 12 at 23:22 MathOverflow 123

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### Is $Sym^g$ of a Riemann Surface of genus $g$ Calabi-Yau?

mar 11 12 at 3:17 unknown (google) 5,540629

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### Index of a Morse function via the Hessian tensor

aug 7 10 at 13:32 Deane Yang 12.6k13380

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### Homology in the $A_\infty$ World

apr 7 at 17:15 Tim Perutz 8,65511642

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### Massey Products vs. $A_\infty$-Structures

mar 27 12 at 1:28 John Palmieri 1,8241715

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