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MathGroup Archive 1998

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Re: No trace of trace!

  • To: mathgroup at smc.vnet.net
  • Subject: [mg15135] Re: No trace of trace!
  • From: "Allan Hayes" <hay at haystack.demon.co.uk>
  • Date: Wed, 16 Dec 1998 03:11:12 -0500
  • References: <754ulc$je8@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Peter writes

> hi allan
>
> i actually did try Tr; it was my 2nd guess.  but Mathematica doesn't seem to know
> it.  i just entered Tr[{{a, b}, {c, d}}] and Mathematica gave back
> Tr[{{a, b}, {c, d}}].


Once  more I slipped into using a beta copy of the next version.

So, its coming, and meanwhile

Transpose[{{a, b}, {c, d}},{1,1}]

{a,d}

Plus@@%

a+d

Allan

---------------------
Allan Hayes
Mathematica Training and Consulting
www.haystack.demon.co.uk
hay at haystack.demon.co.uk
Voice: +44 (0)116 271 4198
Fax: +44 (0)870 164 0565




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