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Student Support Forum: 'Exponent of a Matrix' topicStudent Support Forum > General > "Exponent of a Matrix"

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umklapp
06/29/12 1:49pm

Hi,
I am playing with MatrixExp in Mathematica 7.
Input:
"mmaatt[a_, b_, c_] := {{a, 1, 0}, {1, b, 2}, {2, 3, c}}
a = 1;
b = 2;
c = 3;
Log[Tr[MatrixExp[mmaatt[a, b, c]]]]"
However, I got very weird output with # and & symbols as follows. Could someone explain it to me ? Thanks!
"Log[RootSum[-1 + 4 #1 - 6 #1^2 + #1^3 &, (-5 E^#1 #1 + E^#1 #1^2)/(
4 - 12 #1 + 3 #1^2) &] +
RootSum[-1 + 4 #1 - 6 #1^2 + #1^3 &, (
3 E^#1 - 4 E^#1 #1 + E^#1 #1^2)/(4 - 12 #1 + 3 #1^2) &] +
RootSum[-1 + 4 #1 - 6 #1^2 + #1^3 &, (
E^#1 - 3 E^#1 #1 + E^#1 #1^2)/(4 - 12 #1 + 3 #1^2) &]]"

URL: sai.mu1986321@gmail.com,

Subject (listing for 'Exponent of a Matrix')
Author Date Posted
Exponent of a Matrix umklapp 06/29/12 1:49pm
Re: Exponent of a Matrix Nasser M. Ab... 06/30/12 4:29pm
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