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Re: Multiplication by 0: nonzero in versions 8 and 9
Posted:
Jun 16, 2013 5:14 AM


Use of inexact numbers produces inexact results (which can be handled with Rationalize or Chop). Use of exact numbers produes exact results.
Times[1.23 + I 2.45, 0] // Rationalize
0
Times[1.23 + I 2.45, 0] // Chop
0
Times[123/100 + I 245/100, 0]
0
Times[1.23 + I 2.45 // Rationalize, 0]
0
Bob Hanlon
On Sat, Jun 15, 2013 at 4:23 AM, Sotirios Bonanos <sbonano@inp.demokritos.gr > wrote:
> 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/ > > >



