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Questions
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An example of a non-amenable exact group without free subgroups.

sep 12 10 at 18:03 Mark Sapir 27.5k●2●57●118

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Construction of a proper uncountable subgroup of $\mathbb{R}$ without Choice.

aug 19 10 at 19:02 Richard Stanley 13.3k●2●60●94

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Examples of “Monster” groups

mar 5 at 5:08 Rodrigo A. Pérez 1,612●8●21

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Topics for an Undergraduate Expository Paper in Number Theory

dec 28 at 1:57 Ken W. Smith 113●1●2●6

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A Reference for Schubert’s Theorem

may 8 10 at 17:07 Daniel Moskovich 10.9k●1●36●105

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What is the probability that two numbers are relatively prime? [closed]

may 15 12 at 20:19 i707107 794●3●8

 
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How similar/different are dense subgroups of a compact group.

jan 28 at 10:44 Andreas Thom 13k●1●23●64

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Hausdorff Dimension of Cayley Graphs of Groups

jun 2 10 at 2:13 Victor Protsak 7,751●1●30●44