Tricki
a repository of mathematical know-how

Articles

Articlesort icon Created Updated
How to work without an identity element when you clearly need it 25/04/2009 - 00:48 12 years 21 weeks ago
I have a problem about a continuous function 18/04/2009 - 01:15 12 years 22 weeks ago
I have a problem about a supremum or an infimum 18/04/2009 - 12:53 12 years 24 weeks ago
I have a problem about an infinite sum 27/04/2009 - 16:50 12 years 23 weeks ago
I have a problem about integration 23/04/2009 - 00:02 6 years 11 weeks ago
I have a problem about open or closed sets 13/05/2009 - 23:28 12 years 20 weeks ago
I have a problem about the convergence of a sequence 17/04/2009 - 00:13 12 years 22 weeks ago
I have a problem to solve in real analysis 16/04/2009 - 13:07 12 years 23 weeks ago
I have a problem to solve in real analysis and I do not believe that a fundamental idea is needed 17/04/2009 - 13:56 12 years 24 weeks ago
I need to find a real number with a certain property 18/04/2009 - 17:22 12 years 24 weeks ago
I want to find a non-trivial solution to a system of equations 09/05/2009 - 18:27 12 years 21 weeks ago
I want to find surgery presentation for a knot or link corresponding to a Seifert surface 19/04/2009 - 06:11 12 years 24 weeks ago
If a parameter is generating undesirable boundary terms, try averaging over many choices of that parameter 01/05/2009 - 00:43 12 years 22 weeks ago
If an argument looks promising but needs a hypothesis, assume the hypothesis for now but try to remove it later 04/05/2009 - 21:41 12 years 22 weeks ago
If you are calculating an integral, complex substitutions are not forbidden 30/04/2009 - 10:14 6 years 11 weeks ago
If you are getting stuck, then try to prove rigorously that your approach cannot work 04/01/2009 - 21:15 12 years 11 weeks ago
If you are looking for a disk, try to find a grope first 20/04/2009 - 04:55 12 years 24 weeks ago
If you don't have an identity element, a set of local units is more than enough 25/04/2009 - 00:48 12 years 23 weeks ago
If you don't know how to make a decision, then don't make it 29/04/2009 - 19:20 12 years 22 weeks ago
If you want to calculate an infinite sum exactly, relate it to coefficients associated with some function 27/04/2009 - 17:03 12 years 22 weeks ago
If your problem can be expressed in terms of convolutions and inner products then take the Fourier transform 22/04/2009 - 09:58 12 years 23 weeks ago
If your topological invariant takes integer values, they may well be homology classes in disguise 02/05/2009 - 09:25 12 years 21 weeks ago
Impossibility and nonexistence front page 26/12/2008 - 13:02 12 years 30 weeks ago
Improving a subgroup of finite index by intersecting 19/04/2009 - 16:56 12 years 24 weeks ago
Induction front page 02/01/2009 - 01:20 12 years 22 weeks ago