How to work without an identity element when you clearly need it |
25/04/2009 - 00:48 |
*11 years 16 weeks* ago |

I have a problem about a continuous function |
18/04/2009 - 01:15 |
*11 years 17 weeks* ago |

I have a problem about a supremum or an infimum |
18/04/2009 - 12:53 |
*11 years 18 weeks* ago |

I have a problem about an infinite sum |
27/04/2009 - 16:50 |
*11 years 17 weeks* ago |

I have a problem about integration |
23/04/2009 - 00:02 |
*5 years 5 weeks* ago |

I have a problem about open or closed sets |
13/05/2009 - 23:28 |
*11 years 14 weeks* ago |

I have a problem about the convergence of a sequence |
17/04/2009 - 00:13 |
*11 years 16 weeks* ago |

I have a problem to solve in real analysis |
16/04/2009 - 13:07 |
*11 years 17 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 |
*11 years 18 weeks* ago |

I need to find a real number with a certain property |
18/04/2009 - 17:22 |
*11 years 18 weeks* ago |

I want to find a non-trivial solution to a system of equations |
09/05/2009 - 18:27 |
*11 years 15 weeks* ago |

I want to find surgery presentation for a knot or link corresponding to a Seifert surface |
19/04/2009 - 06:11 |
*11 years 18 weeks* ago |

If a parameter is generating undesirable boundary terms, try averaging over many choices of that parameter |
01/05/2009 - 00:43 |
*11 years 16 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 |
*11 years 16 weeks* ago |

If you are calculating an integral, complex substitutions are not forbidden |
30/04/2009 - 10:14 |
*5 years 5 weeks* ago |

If you are getting stuck, then try to prove rigorously that your approach cannot work |
04/01/2009 - 21:15 |
*11 years 5 weeks* ago |

If you are looking for a disk, try to find a grope first |
20/04/2009 - 04:55 |
*11 years 18 weeks* ago |

If you don't have an identity element, a set of local units is more than enough |
25/04/2009 - 00:48 |
*11 years 17 weeks* ago |

If you don't know how to make a decision, then don't make it |
29/04/2009 - 19:20 |
*11 years 16 weeks* ago |

If you want to calculate an infinite sum exactly, relate it to coefficients associated with some function |
27/04/2009 - 17:03 |
*11 years 16 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 |
*11 years 18 weeks* ago |

If your topological invariant takes integer values, they may well be homology classes in disguise |
02/05/2009 - 09:25 |
*11 years 15 weeks* ago |

Impossibility and nonexistence front page |
26/12/2008 - 13:02 |
*11 years 24 weeks* ago |

Improving a subgroup of finite index by intersecting |
19/04/2009 - 16:56 |
*11 years 18 weeks* ago |

Induction front page |
02/01/2009 - 01:20 |
*11 years 16 weeks* ago |