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At: absval zero


i:. |i| = 0 i = 0

By:
Unfold `absval` 0
THEN
UnivCD


Generated subgoal:

11. i:
if 0i i else -i fi = 0 i = 0


About:
ifthenelseintnatural_numberminusequalall

(4steps) PrintForm Definitions int 2 Sections StandardLIB Doc