Date: Jun 15, 2013 4:16 AM Author: sbonano@inp.demokritos.gr Subject: Multiplication by 0: non-zero in versions 8 and 9 Hello ,

I have noticed that in all Mathematica versions <8, multiplying a real or complex number by the integer 0 gives 0, but in versions 8 and 9

Times[0, 0.567] gives 0.

and

Times[1.23 + I 2.45, 0] gives 0. + 0. I

I don't know what prompted this change but it is definitely wrong: the zero property of multiplication holds for real and complex numbers also (see https://en.wikipedia.org/wiki/Multiplication#Properties) .

Sotirios Bonanos

http://www.inp.demokritos.gr/~sbonano/