## Recent Questions

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### Is there any proof that you feel you do not “understand”?

2d ago Terry Tao 27.6k4107178
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### objects which can’t be defined without making choices but which end up independent of the choice

28m ago Timothy Chow 14.5k168137
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### Philosophy behind Yitang Zhang’s work on the Twin Primes Conjecture

1m ago Ben Green 2,9251826
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### Are the two meanings of “undecidable” related?

2d ago Thomas Benjamin 41917
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### Sequences equidistributed modulo 1

2d ago Aaron Meyerowitz 11.5k11031
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### Effect of abc conjecture on Fermat’s Last Theorem

may 17 at 20:11 quid 12.9k3151
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### How can I randomly draw an ensemble of unit vectors that sum to zero?

1h ago jc 3,925923
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### A catalog of faithful representations of finite groups?

may 16 at 7:08 Geoff Robinson 9,85612127
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### Are residually finite, perfect groups residually alternating?

may 18 at 11:00 Stefan Kohl 2,600215
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### Why are Schur multipliers of finite simple groups so small?

may 17 at 22:41 Geoff Robinson 9,85612127
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### Can group cohomology be interpreted as an obstruction to lifts?

may 16 at 6:27 Mark Grant 9,06111333
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### Cardinals without choice: interpolation (reference wanted)

may 17 at 1:00 Asaf Karagila 7,19811444
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### Blue and red balls puzzle

may 17 at 16:52 Douglas Zare 13.1k33658
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### Surfaces ruled over elliptic curves

6h ago Francesco Polizzi 18.9k23455
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### Set Theory exercise.

1d ago Asaf Karagila 7,19811444
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### What’s the definition of continuous of set-valued functions?

1d ago katz 1,264112
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### Prym varieties as Jacobian varieties

may 17 at 1:14 roy smith 4,8913428
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### Reasons to prefer one large prime over another to approximate characteristic zero

may 16 at 0:57 Charles Staats 4,05911945
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### Is there a contractible bounded homogeneous space?

may 17 at 21:16 Ramiro de la Vega 3,590715
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### Are sums of the inverses of prime siblings finite?

8h ago Wlodzimierz Holsztynski 81447
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### “Inverse problem” for Brauer groups

may 17 at 20:09 Yazdegerd III 32114
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### Does there exist a space X whose suspension is homotopy equivalent to [0,1] rel ends but where X is not contractible?

may 16 at 8:17 Ricardo Andrade 2,3821918
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### Vector field pull back from embedding [closed]

1d ago Nevermind 27018
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### Algebraic closure of a polynomial ring

23h ago Goldstern 5,25011227
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### Real root of a cubic equation [closed]

20h ago Barry Cipra 3,2391818
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### locally symmetric space and global symmetric space

may 17 at 23:52 Misha 12.6k12648
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### Homological characterization of smooth maps

3h ago Liran Shaul 5831512
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### Germs at infinity of sequence of integers

may 16 at 12:41 Andreas Blass 32.9k454109
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### Cyclotomic fields

may 16 at 15:50 Aakumadula 2,8851513
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### Karoubi versus Kasparov K-theory

0s ago Mkouboi 1216
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### Non-standard model of the domination principle

may 18 at 10:22 Zhang Jing 309116
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### On finite groups with same complex-valued character table

2d ago Dietrich Burde 1,835312
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### Hartogs Theorem and Canonical Bundles

22h ago Karl Schwede 11.4k11435
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### What are these compact sets called?

may 18 at 7:56 Loïc Teyssier 68319
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### Importance of separability vs. second-countability

18h ago Joseph Van Name 1,799411
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2d ago Heitor 65
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### What are the main structure theorems on finitely generated commutative monoids?

1d ago Benjamin Steinberg 10.7k11449
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### Power series whose partial sums attain only finitely many values

may 16 at 3:33 GH 15.1k13153
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### Rigidification and good moduli space (morphism) in the sense of Alper

may 17 at 16:48 Angelo 19.5k34775
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### Generalization of the Lefschetz fixed point theorem

may 16 at 14:45 Dan Petersen 10.1k12146
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### Diophantine equation with primitive nth root of unity

may 16 at 0:48 Abhinav Kumar 1,434811
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### Who first computed the integral cohomology ring of a weighted projective space (WPS) ?

1d ago Al-Amrani 16
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### Heat integro - differential equation

may 15 at 20:40 Zamoura 133
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### Octonions and the Fano plane.

21h ago Drew Armstrong 131
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### A question about large real closed fields

2d ago The User 2938
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### Can distinct open knots correspond to the same closed knot?

20h ago Keenan Pepper 2574
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