small Mathematica question

[Mshafee]

Dear All,

I'm a new Mathematica user. I want to define symbolic Matrices and then operate on them (getting the inverse of a matrix, multiplying 2 matrices, adding matrices,....).

Could you please send me how to start? Thanks in advance.

Best Regards,
Marwah Shafee

 

[SWINI]

can u eloborate ur question properly????

 

[cedance]

these links may be of some help. its better to go thro' the materials yourself initially.

http://avaxsphere.com/ebooks/mathematica_ebooks.html


however, for your question these 2 pages give you the answer pretty convincingly i guess.

**broken link removed**
**broken link removed**

cedance.

 

[amraldo]

AA Marwa,
You can ask Adel Abdel-Rahman. He is good at it.
BR,
Amr Ali.

 

[pankajrangaree1]

for 2by2 matrix finding the inverse is quite easy.just rintereplace the diagonal elements and change the sign of the remaining elements.but for 3by3 matrix use the formula A.A-1=1.if u have to start matrix u can have grewal book or reliable series