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## Re: use of symbolic toolbox for the inverse of a matrix

**From**: |
Martin Helm |

**Subject**: |
Re: use of symbolic toolbox for the inverse of a matrix |

**Date**: |
Thu, 29 Sep 2011 19:29:37 +0200 |

Am Donnerstag, den 29.09.2011, 18:47 +0200 schrieb george brida:
>* Dear Octavers,*
>* I have the following matrix A:*
>* A(1,1)=T ; A(1,2)=T*(T+1)/2 ; *
>* A(2,1)=T*(T+1)/2 ; A(2,2)= T*(T+1)*(2*T+1)/6*
>* *
>* I would like to find the inverse of this matrix in this general form.*
>* Can you please help me,*
>* thank you in advance.*
>* George.*
I do not know how to do that with the symbolic package, but you can
easily do that with maxima (http://maxima.sourceforge.net) which is
actually a (free as in speech and free as free beer) computer algebra
system unlike octave which has focus on numerics and not symbolic
computations.
in maxima type:
A: matrix([T,T*(T+1)/2],[T*(T+1)/2, T*(T+1)*(2*T+1)/6]);
invert(A);