User Gerhard Paseman

2 votes

Residual finiteness: why do we care?

answered Feb 26, 2015 at 19:47

2 votes

Placing numbers $1,2,\ldots,n^3$ in a cube so that numbers of any two adjacent unit subcube are coprime

answered Apr 7, 2014 at 17:35

2 votes

Enumeration of $0-1$ matrices with determinant $1$

answered Mar 23, 2015 at 17:59

2 votes

Distribution of composite numbers

answered May 8, 2015 at 0:01

2 votes

Accepted

Distribution of composite numbers

answered May 8, 2015 at 23:54

2 votes

Important open problems that have already been reduced to a finite but infeasible amount of computation

answered May 15, 2015 at 16:01

2 votes

Smallest constant so that there are at least $n/\log_2{n}$ primes between $n$ and a constant multiple of $n$

answered May 15, 2015 at 17:22

2 votes

Accepted

Proofs needed for observations regarding prime-partitionable numbers

answered Aug 3, 2015 at 23:16

2 votes

Euler's totient function relative function

answered Sep 2, 2015 at 16:21

2 votes

Approximating a real by a ratio of primes

answered Jul 12, 2015 at 0:15

2 votes

Are there enough additive permutations?

answered Jul 12, 2015 at 23:58

2 votes

Is there a fixed integer $x>1$ satisfing ${\sigma}^{k}(x)\equiv 0\pmod{x}$ for all positive integers $k$?

answered Jul 15, 2015 at 1:16

1 vote

Accepted

Is there a fixed integer $x>1$ satisfing ${\sigma}^{k}(x)\equiv 0\pmod{x}$ for all positive integers $k$?

answered Jul 21, 2015 at 21:53

1 vote

The number of totatives to the nth primorial, in an interval shorter than the nth primorial

answered Sep 10, 2015 at 18:41

1 vote

Regions on a sphere that avoid a fixed point set

answered Jun 8, 2015 at 0:10

1 vote

Product of binary Boolean operators

answered Feb 27, 2015 at 18:45

1 vote

Small quotients of smooth numbers

answered Apr 28, 2015 at 19:11

1 vote

Degree necessary of a polynomial?

answered May 5, 2015 at 16:46

1 vote

Has philosophy ever clarified mathematics?

answered Oct 1, 2014 at 21:12

1 vote

what-if.xkcd.com: stabbing (simply connected) regions on the 2-sphere with few geodesics

answered Oct 1, 2014 at 22:22

1 vote

Braid group on 4 strands

answered Sep 28, 2015 at 18:52

1 vote

Simultaneous lcms

answered Jul 1, 2015 at 19:42

1 vote

Maximizing the minimum of piecewise linear functions in high dimensional space

answered Aug 14, 2011 at 0:25

1 vote

finding the parity of a permutation in little space

answered Aug 11, 2011 at 22:15

1 vote

Representing integer points inside a polytope using a unit hypercube

answered Aug 12, 2011 at 19:15

1 vote

Another Question About Powers mod p

answered Jul 31, 2011 at 22:27

1 vote

Regular polygon shadows of convex polyhedra

answered Aug 23, 2011 at 20:06

1 vote

Optimizing a game tree

answered Aug 21, 2011 at 4:15

1 vote

Finding information about the basics of an advanced math topic

answered Oct 22, 2011 at 20:48

1 vote

Asymptotic growth of recurrence relation $x_n=\min\limits_{n_1+n_2=n}(a(x_{n_1}+x_{n_2})+2n_1n_2)$

answered Oct 3, 2013 at 20:03

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121 Answers

Residual finiteness: why do we care?

Placing numbers $1,2,\ldots,n^3$ in a cube so that numbers of any two adjacent unit subcube are coprime

Enumeration of $0-1$ matrices with determinant $1$

Distribution of composite numbers

Distribution of composite numbers

Important open problems that have already been reduced to a finite but infeasible amount of computation

Smallest constant so that there are at least $n/\log_2{n}$ primes between $n$ and a constant multiple of $n$

Proofs needed for observations regarding prime-partitionable numbers

Euler's totient function relative function

Approximating a real by a ratio of primes

Are there enough additive permutations?

Is there a fixed integer $x>1$ satisfing ${\sigma}^{k}(x)\equiv 0\pmod{x}$ for all positive integers $k$?

Is there a fixed integer $x>1$ satisfing ${\sigma}^{k}(x)\equiv 0\pmod{x}$ for all positive integers $k$?

The number of totatives to the nth primorial, in an interval shorter than the nth primorial

Regions on a sphere that avoid a fixed point set

Product of binary Boolean operators

Small quotients of smooth numbers

Degree necessary of a polynomial?

Has philosophy ever clarified mathematics?

what-if.xkcd.com: stabbing (simply connected) regions on the 2-sphere with few geodesics

Braid group on 4 strands

Simultaneous lcms

Maximizing the minimum of piecewise linear functions in high dimensional space

finding the parity of a permutation in little space

Representing integer points inside a polytope using a unit hypercube

Another Question About Powers mod p

Regular polygon shadows of convex polyhedra

Optimizing a game tree

Finding information about the basics of an advanced math topic

Asymptotic growth of recurrence relation $x_n=\min\limits_{n_1+n_2=n}(a(x_{n_1}+x_{n_2})+2n_1n_2)$