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To represent one object as combinations of another, try averaging the latter object using the symmetries of the former 22/05/2009 - 18:44 5 years 26 weeks ago
Keep matrices in factored form 22/05/2009 - 13:02 5 years 26 weeks ago
Numerical linear algebra 05/05/2009 - 12:46 5 years 26 weeks ago
To prove facts about Borel sets, use closure properties 05/05/2009 - 13:47 5 years 27 weeks ago
Use Fourier expansion to eliminate nasty cutoffs 02/04/2009 - 10:01 5 years 27 weeks ago
To construct exotic sets, use limiting arguments 15/05/2009 - 13:32 5 years 27 weeks ago
I have a problem about open or closed sets 13/05/2009 - 22:28 5 years 27 weeks ago
To construct exotic functions, use limiting arguments 25/03/2009 - 17:24 5 years 27 weeks ago
Number of elements in cartesian products 19/04/2009 - 22:24 5 years 27 weeks ago
To prove that a set is open or closed, use basic theorems rather than direct arguments 13/05/2009 - 22:48 5 years 27 weeks ago
Bounded functions that behave almost everywhere are Riemann integrable 24/04/2009 - 14:04 5 years 27 weeks ago
To find a rational with low denominator near a given real, use continued fractions 12/05/2009 - 21:32 5 years 28 weeks ago
Computational number theory front page 10/05/2009 - 14:40 5 years 28 weeks ago
Elementary probability front page 28/03/2009 - 03:47 5 years 28 weeks ago
Probability front page 28/03/2009 - 16:08 5 years 28 weeks ago
Use an approximation as if it were exact 11/05/2009 - 13:25 5 years 28 weeks ago
LU factorization 11/05/2009 - 12:52 5 years 28 weeks ago
Numerical analysis front page 04/05/2009 - 16:45 5 years 28 weeks ago
Solution of linear equations: direct methods 11/05/2009 - 12:37 5 years 28 weeks ago
Make your method keep the symmetries of the problem 11/05/2009 - 13:09 5 years 28 weeks ago
To factorize n, find a non-trivial square root of 1 mod n 10/05/2009 - 15:23 5 years 28 weeks ago
To establish that n is composite, show that Fermat's little theorem does not hold for n 10/05/2009 - 14:58 5 years 28 weeks ago
To work out powers mod n, use repeated squaring 10/05/2009 - 15:43 5 years 28 weeks ago
To find a factor of n, find some m such that (m,n) is not 1 10/05/2009 - 15:13 5 years 28 weeks ago
Number theory front page 23/03/2009 - 11:04 5 years 28 weeks ago