HOL nicely simplifies natural number expressions, e.g.:

 - SIMP_CONV arith_ss [] ``?(i:num) (j:num). i <= j``;
 > val it = [oracles: DISK_THM] [axioms: ] [] |- (?i j. i <= j) = T : thm

however, I can't figure out how to get this for integer expressions, e.g.:

 - SIMP_CONV int_ss [] ``?(i:int) (j:int). i <= j``;
 ! Uncaught exception:
 ! UNCHANGED

Anyone know if there is a simpset for integers that works on examples like this?

Mike

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