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# Questions

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### Counterexamples in algebraic topology?

mar 29 at 2:19 Ricardo Andrade 2,3821918

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### third stable homotopy group of spheres via geometry?

jan 25 at 9:26 Johannes Ebert 11.4k3355

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### A question about the topological proofs of Bott periodicity

jan 2 12 at 1:46 Peter May 12.1k13854

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### Is every ‘'group-completion’' map an acyclic map?

mar 21 at 22:15 Johannes Ebert 11.4k3355

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### Good functorial model for BG

oct 19 10 at 22:50 David Roberts 11.7k21855

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### Degrees of self-maps of aspherical manifolds

oct 15 10 at 19:11 Agol 23.9k13384

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### What is a symmetric monoidal $(\infty,n)$-category?

nov 20 11 at 19:30 Jacob Lurie 6,2592436

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### Lie’s third theorem via differential graded algebras?

oct 23 10 at 12:19 Urs Schreiber 6,4581321

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### Homotopy invariance of vector bundles by parallel transport: reference needed for my students.

jun 23 at 7:22 Liviu Nicolaescu 11.3k12033

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