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# Questions

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172
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### Gap between first two nonzero Laplacian eigenvalues on closed compact surface?

may 2 at 19:11 Agol 23.9k13384

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284
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### Surface Laplace-Beltrami without coordinates, exterior calculus?

oct 22 at 2:24 Deane Yang 12.6k13380

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143
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### Distributions induced by (weighted) random walks on the integer lattice

aug 21 at 0:43 Will Sawin 18.5k12448

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213
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### Does the operator $\mathrm{id}-t\Delta$ or its Green’s function have a name?

aug 7 at 21:39 Rafe Mazzeo 1,17923

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493
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### Tweetable way to see that Willmore energy is Möbius invariant?

jun 14 at 22:26 Yuri Vyatkin 8915

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562
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### Relationship between Green’s function and geodesic distance?

may 7 12 at 10:38 Liviu Nicolaescu 11.3k12033

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193
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### Projection onto a quadratic cone?

apr 10 12 at 23:22 MathOverflow 123

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355
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### Area of a Convex Polygon (Described via Half-Planes)

jan 24 12 at 17:36 Joseph O'Rourke 43.2k149214

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469
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### How do you solve linear systems whose solutions decay exponentially?

nov 3 11 at 8:38 Federico Poloni 4,24911224

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