The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » Inactive » comp.soft-sys.math.mathematica

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: Multiplication by 0: non-zero in versions 8 and 9
Replies: 2   Last Post: Jun 17, 2013 6:20 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Richard Fateman

Posts: 1,539
Registered: 12/7/04
Re: Multiplication by 0: non-zero in versions 8 and 9
Posted: Jun 16, 2013 5:09 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

On 6/15/2013 1:16 AM, Sotirios Bonanos 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
> .
> Sotirios Bonanos

You appear to be making a distinction between "0" and "0."
and "0.+0.I". Yet for Mathematica, 0==0.+0.*I returns True.

You may have a valid objection to something that has been
changed in the program, but appealing to the wikipedia
article is not particularly significant.

After all,
Times[0,x] comes out as 0, but this is not what happens
for x being 0., Indeterminate, Infinity, Interval[{-1,1}],
and probably other stuff.

As Dorothy said, you are not in Kansas anymore.

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.