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Multiplication by 0: non-zero in versions 8 and 9
*To*: mathgroup at smc.vnet.net
*Subject*: [mg131171] Multiplication by 0: non-zero in versions 8 and 9
*From*: Sotirios Bonanos <sbonano at inp.demokritos.gr>
*Date*: Sat, 15 Jun 2013 04:23:48 -0400 (EDT)
*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com
*Delivered-to*: l-mathgroup@wolfram.com
*Delivered-to*: mathgroup-outx@smc.vnet.net
*Delivered-to*: mathgroup-newsendx@smc.vnet.net
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/
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