Unary plus of a value of type
Function:
(defun plus-sint (x) (declare (xargs :guard (and (sintp x)))) (sint-fix x))
Theorem:
(defthm sintp-of-plus-sint (sintp (plus-sint x)))
Theorem:
(defthm plus-sint-of-sint-fix-x (equal (plus-sint (sint-fix x)) (plus-sint x)))
Theorem:
(defthm plus-sint-sint-equiv-congruence-on-x (implies (sint-equiv x x-equiv) (equal (plus-sint x) (plus-sint x-equiv))) :rule-classes :congruence)