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Re: NSolve fails where Solve succeeds!

• To: mathgroup at smc.vnet.net
• Subject: [mg43478] Re: NSolve fails where Solve succeeds!
• From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
• Date: Thu, 18 Sep 2003 05:38:40 -0400 (EDT)
• Organization: Universitaet Leipzig
• References: <bk9jer$t8t$1@smc.vnet.net>
• Reply-to: kuska at informatik.uni-leipzig.de
• Sender: owner-wri-mathgroup at wolfram.com

Hi,

you say that the matrix {{a,b}
                         {c,d}}

should be equal to a scalar 0 and you wonder
why Mathematica dont' like it ...

I wonder why Solve[] gives a solution at all
and *this* seems to be the bug. You mean

NSolve[Flatten[Thread  /@ Thread[{{a, b}, {c, d}} == 0]]]

you you should tell Mathematica *what* you mean.

Regards
  Jens


Pavel Pokorny wrote:
> 
>   Dear Mathematica friends
> 
>    Solve[{{a,b},{c,d}}==0]
> 
> gives the correct solution in Mathematica 5.0 while
> 
>    NSolve[{{a,b},{c,d}}==0]
> 
> fails.
> 
> Is it a bug or an intention?
> 
> It would be nice to have Solve and NSolve giving
> as close results as possible.
> 
> --
> Pavel Pokorny
> Math Dept, Prague Institute of Chemical Technology
> http://www.vscht.cz/mat/Pavel.Pokorny

• Follow-Ups:
  • Re: Re: NSolve fails where Solve succeeds!
    • From: Murray Eisenberg <murray@math.umass.edu>