I was looking at the (reported) bug
(%i1) polarform((a+1)/2 - a/2 - 1/2);
atan2: atan2(0,0) is undefined.
Stavros suggested a call to csign in absarg--I tried doing that:
(%i10) polarform(%i * inf);
0> Calling (ABSARG ((MTIMES SIMP) $%I $INF))
Is 1 zero or nonzero?
The test carg(%i*inf) is in rtest_carg.
Does anybody know something about this silly askskign? Does some special variable need to be set?
--Barton