REAL_INT_MUL_CONV : conv

SYNOPSIS

Conversion to perform multiplication on two integer literals of type :real.

DESCRIPTION

The call REAL_INT_MUL_CONV `c1 * c2` where c1 and c2 are integer literals of type :real, returns |- c1 * c2 = d where d is the canonical integer literal that is equal to c1 * c2. The literals c1 and c2 may be of the form &n or -- &n (with nonzero n in the latter case) and the result will be of the same form.

FAILURE CONDITIONS

Fails if applied to a term that is not the product of two permitted integer literals of type :real.

EXAMPLE

  # REAL_INT_MUL_CONV `&6 * -- &9`;;
  val it : thm = |- &6 * -- &9 = -- &54

COMMENTS

The related function REAL_RAT_MUL_CONV subsumes this functionality, also applying to rational literals. Unless the restriction to integers is desired or a tiny efficiency difference matters, it should be used in preference.