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# Questions

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### Discrete Morse theory and chess

may 4 at 3:44 Brian Rushton 1,317419

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### Why isn’t $\langle x,y,z|xyzx^{-1}y^{-1}z^{-1}\rangle$ a hyperbolic surface group?

may 7 at 14:16 Lee Mosher 5,8061926

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### Do quasi convex hyperbolic subgroups remain quasi convex after adding redundant generators?

may 7 at 14:18 Lee Mosher 5,8061926

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840
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### Great mathematics books by pre-modern authors

apr 19 at 14:56 Alexandre Eremenko 10.6k12439

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### Untwisting Heegaard diagrams

apr 24 at 15:59 Dave Futer 986412

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### Would a closed universe with special relativity violate causality? Does the universe have to be simply connected?

apr 2 at 18:22 Brian Rushton 1,317419

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664
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### How does hyperbolicity of space time affect our lives?

mar 15 at 18:33 Y Macdisi 1475

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### How large is this “algebra” of defining graphs for Right-angled Artin groups?

may 9 at 15:10 Lee Mosher 5,8061926

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568
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### Topology, the board game

mar 13 at 18:01 Adam Epstein 946212

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