direct product

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Gosie -<br>
&nbsp;&nbsp;&nbsp; Thanks for your reply. Unfortunately, this is not the direct
product. <br>
Dick Fell<br>
<a class="moz-txt-link-abbreviated" href="mailto:go_furuya@infoseek.jp">go_furuya@infoseek.jp</a>; wrote:<br>
<blockquote type="cite" cite="mid20040828171803.go_furuya@infoseek.jp">
  <pre wrap="">hi
That is posiible.
for example
(C1) load(diag);
(D1)         /usr/local/share/maxima/5.9.0/share/contrib/diag.mac
(C2) diag([matrix([a0,a1],[a2,a3]),matrix([b1,b2],[b3,b4])]);

                              [ a0  A1  0   0  ]
                              [                ]
                              [ A2  A3  0   0  ]
(D2)                          [                ]
                              [ 0   0   B1  B2 ]
                              [                ]
                              [ 0   0   b3  b4 ]
diag(x),x is list of numbers,or list of matrix.

Gosei Furuya


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    <pre wrap="">Is there a maxima  share package that computes the direct product of 
matrices? (I can not find any in my maxima).
Thanks,
Dick Fell

-- 
Richard N. Fell
Martin Fisher School of Physics
Brandeis University
Waltham, Ma 02454
<a class="moz-txt-link-abbreviated" href="mailto:fell@brandeis.edu">fell@brandeis.edu</a>;


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<pre class="moz-signature" cols="72">-- 
Richard N. Fell
Martin Fisher School of Physics
Brandeis University
Waltham, Ma 02454
<a class="moz-txt-link-abbreviated" href="mailto:fell@brandeis.edu">fell@brandeis.edu</a>;
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