Tricki
a repository of mathematical know-how

Articles

Articlesort icon Created Updated
How to work without an identity element when you clearly need it 24/04/2009 - 23:48 11 years 38 weeks ago
I have a problem about a continuous function 18/04/2009 - 00:15 11 years 39 weeks ago
I have a problem about a supremum or an infimum 18/04/2009 - 11:53 11 years 40 weeks ago
I have a problem about an infinite sum 27/04/2009 - 15:50 11 years 39 weeks ago
I have a problem about integration 22/04/2009 - 23:02 5 years 28 weeks ago
I have a problem about open or closed sets 13/05/2009 - 22:28 11 years 36 weeks ago
I have a problem about the convergence of a sequence 16/04/2009 - 23:13 11 years 38 weeks ago
I have a problem to solve in real analysis 16/04/2009 - 12:07 11 years 39 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 - 12:56 11 years 40 weeks ago
I need to find a real number with a certain property 18/04/2009 - 16:22 11 years 40 weeks ago
I want to find a non-trivial solution to a system of equations 09/05/2009 - 17:27 11 years 37 weeks ago
I want to find surgery presentation for a knot or link corresponding to a Seifert surface 19/04/2009 - 05:11 11 years 40 weeks ago
If a parameter is generating undesirable boundary terms, try averaging over many choices of that parameter 30/04/2009 - 23:43 11 years 38 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 - 20:41 11 years 38 weeks ago
If you are calculating an integral, complex substitutions are not forbidden 30/04/2009 - 09:14 5 years 28 weeks ago
If you are getting stuck, then try to prove rigorously that your approach cannot work 04/01/2009 - 20:15 11 years 27 weeks ago
If you are looking for a disk, try to find a grope first 20/04/2009 - 03:55 11 years 40 weeks ago
If you don't have an identity element, a set of local units is more than enough 24/04/2009 - 23:48 11 years 39 weeks ago
If you don't know how to make a decision, then don't make it 29/04/2009 - 18:20 11 years 38 weeks ago
If you want to calculate an infinite sum exactly, relate it to coefficients associated with some function 27/04/2009 - 16:03 11 years 38 weeks ago
If your problem can be expressed in terms of convolutions and inner products then take the Fourier transform 22/04/2009 - 08:58 11 years 40 weeks ago
If your topological invariant takes integer values, they may well be homology classes in disguise 02/05/2009 - 08:25 11 years 37 weeks ago
Impossibility and nonexistence front page 26/12/2008 - 12:02 11 years 46 weeks ago
Improving a subgroup of finite index by intersecting 19/04/2009 - 15:56 11 years 40 weeks ago
Induction front page 02/01/2009 - 00:20 11 years 38 weeks ago