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How to work without an identity element when you clearly need it |
24/04/2009 - 23:48 |
11 years 38 weeks ago |
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I have a problem about a continuous function |
18/04/2009 - 00:15 |
11 years 39 weeks ago |
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I have a problem about a supremum or an infimum |
18/04/2009 - 11:53 |
11 years 40 weeks ago |
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I have a problem about an infinite sum |
27/04/2009 - 15:50 |
11 years 39 weeks ago |
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I have a problem about integration |
22/04/2009 - 23:02 |
5 years 28 weeks ago |
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I have a problem about open or closed sets |
13/05/2009 - 22:28 |
11 years 36 weeks ago |
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I have a problem about the convergence of a sequence |
16/04/2009 - 23:13 |
11 years 38 weeks ago |
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I have a problem to solve in real analysis |
16/04/2009 - 12:07 |
11 years 39 weeks ago |
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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 |
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I need to find a real number with a certain property |
18/04/2009 - 16:22 |
11 years 40 weeks ago |
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I want to find a non-trivial solution to a system of equations |
09/05/2009 - 17:27 |
11 years 37 weeks ago |
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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 |
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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 |
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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 |
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If you are calculating an integral, complex substitutions are not forbidden |
30/04/2009 - 09:14 |
5 years 28 weeks ago |
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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 |
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If you are looking for a disk, try to find a grope first |
20/04/2009 - 03:55 |
11 years 40 weeks ago |
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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 |
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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 |
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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 |
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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 |
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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 |
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Impossibility and nonexistence front page |
26/12/2008 - 12:02 |
11 years 46 weeks ago |
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Improving a subgroup of finite index by intersecting |
19/04/2009 - 15:56 |
11 years 40 weeks ago |
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Induction front page |
02/01/2009 - 00:20 |
11 years 38 weeks ago |
Tricki