klafka | if i consider S and all subsets of S, let S be an infinite set, and i want to check if intersection and union of elements form a ring, if i have 2 elements of S what would AND and OR even be is S a power set? so i have a set of sets? |

Kasadkad | klafka: S isn't a power set unless you say it's a power set |

klafka | well all my teacher said was, "let S and all subsets of S, let S be an infinite set" the only way AND and OR make sense is if S is a set of sets, or like binary strings? |

Kasadkad | Ah It probably has to be a power set |

omgomglol | Could anyone check my work for this integral? http://www.mathbin.net/9433 I'm having a bit of trouble |

qqex | check parentheses/brackets in your equation omgomglol |

klafka | this is really confusing, i was suppose to show that AND and OR do not form a ring but...they do! they are closed and they meet all 6 of the requirements |

omgomglol | ok, should be fixed |

Mr_Awesome | how can LU decomposition be used to find the inverse of a matrix? |

Kasadkad | klafka: with what set? |

klafka | the power set of an infinite set |

Kasadkad | klafka: additive inverses?? |

action | |DARK_MAN| dos damas que no tengan con kien ir a carretiar mandar pv2 ahora ya !!!!!!!!!!!! faltan dos damas!!!! |

|DARK_MAN| | dos damas que no tengan con kien ir a carretiar mandar pv2 ahora ya !!!!!!!!!!!! faltan dos damas!!!! |

klafka | A ^ A = {o} |

Kasadkad | Uh A intersect A = A |

klafka | ooh oh duh um A AND A-complement = {0} |

WILDSTYLE | Hi. |

Kasadkad | klafka: what about additive identity? Hi Well |

klafka | identity is A + e = A, so A AND A = A oh but it has to be true for all doesn't it |

Kasadkad | First off: you're taking intersect as addition and union as multiplication? Yes |

qqex | omgomglol: the integrand is missing a bracket |

klafka | um sec |

qqex | omgomglo ah nm i see you fixed it |

klafka | um A ^ S = A |

action | |DARK_MAN| dos damas que no tengan con kien ir a carretiar mandar pv2 ahora ya !!!!!!!!!!!! faltan dos damas!!!! |

|DARK_MAN| | dos damas que no tengan con kien ir a carretiar mandar pv2 ahora ya !!!!!!!!!!!! faltan dos damas!!!! |

klafka | well if S is a powerset, then it contains itself? wait it can't contain itself? can it |

Kasadkad | No |