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Sidney Raffer's user avatar
Sidney Raffer's user avatar
Sidney Raffer
  • Member for 14 years, 8 months
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38
Computing the Galois group of a polynomial
Apr 29, 2010
answer
35
Define $\mathbb{N}$ in the ring $\mathbb{Z}$ without Lagrange's theorem
Sep 10, 2016
answer
29
Are surjectivity and injectivity of polynomial functions from $\mathbb{Q}^n$ to $\mathbb{Q}$ algorithmically decidable?
Aug 2, 2013
answer
27
Fiction books about mathematicians?
Jul 8, 2012
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23
How often are irrational numbers well-approximated by rationals?
Apr 26, 2010
question
22
Is a real power series that maps rationals to rationals defined by a rational function?
Oct 17, 2010
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19
What is the high-concept explanation on why real numbers are useful in number theory?
Apr 14, 2011
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16
Real algebraic sets bounded away from integer points
Jan 28, 2011
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15
Does there exist a holomorphic function which takes given values on the positive integers?
Apr 8, 2010
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14
A decision problem concerning polynomial rings
May 3, 2010
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Introduction to Filters in Topology
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Uses of quadratic reciprocity theorem
9
Sum of the series: $\sum_{n=0}^\infty\frac{1+n}{3^n}$
8
What is the shortest string that contains all permutations of an alphabet?