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Questions
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Known and unknown about Ramanujan’s tau function

mar 16 at 10:59 DavidLHarden 1,540●2●12

 
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A non-commutative ring from SU(2)

dec 30 at 9:32 DavidLHarden 1,540●2●12

 
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Globally irreducible lattices

jun 27 at 10:42 DavidLHarden 1,540●2●12

 
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Doubly covering an even lattice

mar 15 12 at 1:11 S. Carnahan♦ 25.6k●41●90

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510
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Does the quaternion group Q_8 have a presentation of this form?

may 9 12 at 17:50 Mark Sapir 27.5k●2●57●118

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Jordan’s Theorem on primitive permutation groups

jan 9 12 at 3:08 DavidLHarden 1,540●2●12

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The number of conjugacy classes and the order of the group

dec 17 11 at 20:40 Geoff Robinson 9,856●1●21●27

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A ‘generalized Four Squares Theorem’?

aug 21 11 at 13:38 Abhinav Kumar 1,434●8●11

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Is there a Mathieu groupoid M_31?

jul 18 11 at 21:48 DavidLHarden 1,540●2●12

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Larger cycle than 4, 2, 1 in Collatz iteration?

jun 28 11 at 4:21 Gottfried Helms 1,351●1●3●10

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