> lemma divide_minus_left [simp]: "(-a) / b = - (a / b)" > lemma divide_minus_right [simp]: "a / - b = - (a / b)” > > It would be a mistake to reorient the simprules, but I am suggesting that > they should not be declared as simprules with either orientation.
Maybe
> lemma divide_minus_left [field_simps]: "(-a) / b = - (a / b)"
> lemma divide_minus_right [field_simps]: "a / - b = - (a / b)”
instead?
Florian
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