WORD_CANCEL_ss : ssfrag
STRUCTURE
SYNOPSIS
Simplification fragment for words.
DESCRIPTION
The fragment WORD_CANCEL_ss helps simplify linear equations over bit-vectors. This fragment is designed to work in concert with wordsLib.WORD_ARITH_ss. The procedure will endeavour to ensure that all coefficients appear in positive form. Furthermore, the leftmost coefficient will be highest on the left-hand side of equations.
EXAMPLE
> SIMP_CONV (pure_ss++wordsLib.WORD_ARITH_ss++wordsLib.WORD_CANCEL_ss) []
   ``-3w * b + a = -2w * a + b: word32``;
val it =
   |- (-3w * b + a = -2w * a + b) <=> (4w * b = 3w * a):
   thm
COMMENTS
This fragment can be viewed as a superior version of wordsLib.WORD_ARITH_EQ_ss.
SEEALSO
HOL  Kananaskis-13