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Answers
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24
What are your favorite instructional counterexamples?
10
Fundamental group of a compact space form.
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How far can the analogy between a Cayley graph and a symmetric space be pushed?
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Presentation for an infinite index subgroup of the braid group
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It is well-known that hyperbolic space is delta-hyperbolic, but what is delta?
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Reference for Unitary Group attached to $E/k$
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What are some results in mathematics that have snappy proofs using model theory?
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The finite subgroups of SL(2,C)
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Do decidable properties of finitely presented groups depend only on the profinitization?
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Experimental Mathematics
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Reference for the geometry of horospheres