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## Main Question or Discussion Point

Hi,

Is anyone here working with (sparse) matrices of size million by million? If so, I would like to know what software you use and any special techniques employed.

PS: I am currently working a project where I need to find eigen value of huge matrices. The best I have been able to do so far, is with Matlab for sparse matrix with size around 5x10

Is anyone here working with (sparse) matrices of size million by million? If so, I would like to know what software you use and any special techniques employed.

PS: I am currently working a project where I need to find eigen value of huge matrices. The best I have been able to do so far, is with Matlab for sparse matrix with size around 5x10

^{5}by 5x10^{5}.