Changes related to "Cramer's rule"

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Show new changes starting from 23:24, 27 April 2015
   
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27 April 2015

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23 April 2015

  • (diff | hist) . . Vector space‎; 16:23 . . (-413). .Slawekb (talk | contribs)(take it to the discussion page. the planetmath source (not a WP:RS) implicitly uses uniqueness of inverses (else one is not able to conclude (a^{-1})^{-1}=a, e.g. Let's keep the definition to what appears in sources, not our WP:OR.)
  • (diff | hist) . . Vector space‎; 16:02 . . (+413). .David815 (talk | contribs)(Sorry for revert, but it works. There is no OR, esp. given that math is a priori. Full proof for unique inverses:http://planetmath.org/redundancyoftwosidednessindefinitionofgroup. And two-sided inverses are unique, as explained in the group article.)
  • (diff | hist) . . Vector space‎; 10:52 . . (-413). .Slawekb (talk | contribs)(It is still WP:OR. The argument is unconvincing. You do implicitly use uniqueness of additive inverses. No, uniqueness doesn't follow from existence, unless we assume two-sidedness of the inverse.)
  • (diff | hist) . . m Curvilinear coordinates‎; 07:32 . . (-1). .SDC (talk | contribs)(Covariant and contravariant bases: spelling)
  • (diff | hist) . . Wikipedia:Verifiability‎; 06:21 . . (+1). .WhatamIdoing (talk | contribs)({{anchor|WP:SOURCES}} Reliable sources: Partial rv; the old version seems clearer)
  • (diff | hist) . . Vector space‎; 04:08 . . (+413). .David815 (talk | contribs)(Well, no. I don't use uniqueness of inverse. All I need is for an inverse to exist. Uniqueness actually follows without commutativity anyhow. Also, the thing with -1 follows from 0v=0, which is elementary.)
  • (diff | hist) . . Variation of parameters‎; 01:46 . . (+12). .186.80.4.75 (talk)

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