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11:31 <cizra> Hello.
11:31 <cizra> I'm confused by Maxima matrix operation.
11:31 <cizra> operations*
11:31 <cizra> I entered a nice matrix which looks like
11:31 <cizra> (%o31)                         [[1, 1], [1, 3]]
11:32 <cizra> but it doesn't allow me to calculate its determinant — it says it's a non-square matrix.
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15:40 <rtoy_> cizra:  Too late, but determinant(matrix([1,1],[1,3])) -> 2.
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15:44 <longarms2> is anyone available to help me with a quick question?
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15:47 <rtoy_> Not if you leave after just a couple of minutes....
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17:34 <xian> hello.
17:34 <xian> how is it possible to evaluate variables in maxima?
17:34 <xian> eg %pi should evaluate to something like 3.1415...
17:43 <rtoy_> float(%pi); %pi,numer; bfloat(%pi); etc.
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19:03 <feklee> How can I sum over the elements of an array, starting at a lower bound N and ending at a higher bound N?
19:09 <feklee> Found it: "sum" is what I need.
19:37 <xian> rtoy_: thanks.
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21:30 <dn4> greetings
21:43 <feklee> dn4, Hi.
21:46 <feklee> How do I prevent maxima from printing a result?
21:46 <feklee> (I'm working with very long lists)
21:50 <rtoy_> feklee:  Instead of ending with ;, use $
21:50 <feklee> rtoy_, Thanks!
23:46 <dn4> how would I do imlicit differentiation to x^2+y^2=1