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### Define a big matrix in Sage

Hi all,

I would like to define a big matrix E (130$\times$ 30) with entries looks like E[11,1] = [x, [1,-2]];

E[14,1] = [x, [1,-1,-2,1]];

E[15,1] = [x, [1,-1,-1,-1]]; These entries are stored in a separate file which is readable by Pari but not Sage.

How do I define it by Sage?

### Define a big matrix in Sage

Hi all,

I would like to define a big matrix E (130$\times$ 30) with entries looks being a list like E[11,1] = [x, [1,-2]];

E[14,1] = [x, [1,-1,-2,1]];

E[15,1] = [x, [1,-1,-1,-1]]; [1,-1,-2,1]]; or 0. These entries are stored in a separate file which is readable by Pari but not Sage.

How do I define it by Sage?

### Define a big matrix in Sage

Hi all,

I would like to define a big matrix E (130$\times$ 30) with entries being a list like E[11,1] = [x, [1,-2]];

E[14,1] = [x, [1,-1,-2,1]]; or 0. These entries are stored in a separate file which is readable by Pari but not Sage.

How do I define it by Sage?