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Technically, 0/0 should be allowed, with a result of 1. I don't know any computer implementation that bothers checking for that and allowing it though.
Please no. As x -> 0, 0/x says it should be 0, x/x says it should be 1, sqrt(x)/x says it should be +infinity. 0/0 is the one that really has to be NaN.
Ask your friendly neighbourhood high school calculus teacher for further elaboration.
Oops, you're right. Sorry, as I said, I'm only an armchair mathematician. :-) - -- Chad Nelson Oak Circle Software, Inc. * * * -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkuwJW0ACgkQp9x9jeZ9/wQSzwCgw88N9nFUaBDP6zGb/X4sN+JY M20An12LEUBwh5zSMckCmAW3GpkIGDcI =1Tg1 -----END PGP SIGNATURE-----