Derived Categories
The construction of a derived category in homological algebra proceeds by a step of adding inverses of quasi-isomorphisms.
Read more about this topic: Localization Of A Category
Famous quotes containing the words derived and/or categories:
“A nations domestic and foreign policies and actions should be derived from the same standards of ethics, honesty and morality which are characteristic of the individual citizens of the nation.”
—Jimmy Carter (James Earl Carter, Jr.)
“Kitsch ... is one of the major categories of the modern object. Knick-knacks, rustic odds-and-ends, souvenirs, lampshades, and African masks: the kitsch-object is collectively this whole plethora of trashy, sham or faked objects, this whole museum of junk which proliferates everywhere.... Kitsch is the equivalent to the cliché in discourse.”
—Jean Baudrillard (b. 1929)