1. 11 Feb, 2016 3 commits
    • Robbert Krebbers's avatar
      Shorter names for common math notions. · 44b18f4d
      Robbert Krebbers authored
      Also do some minor clean up.
      44b18f4d
    • Robbert Krebbers's avatar
      Revert "prelude: add notation for > and >= for all kinds of numbers" · 7ebc1859
      Robbert Krebbers authored
      This reverts commit 24fa20e5f8a2042caa19f1f6505102c5434cce54.
      
      Although these symmetric variants sometimes look "better", they
      are really annoying and should IMHO never be used:
      
      1.) For lemmas there is now a choice between >= and <=. Since there is
      no longer a canonical choice, it is very easy to introduce a lot of
      inconsistencies in statements of lemmas.
      
      2.) For automation the situation becomes annoying, you have to built in
      stuff for both >= and <=. That is very error-prone.
      
      3.) For N and Z the notions x <= y and y >= x are not even convertible!
      That means that done/by does not solve x <= y if you have y >= x and if
      avoids you applying certain lemmas.
      7ebc1859
    • Ralf Jung's avatar
      f4192019
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