Hi, 

   I am working on some continuation problems and need to approximate the null 
space of a matrix for bifurcation and branch switching. 

   Are there algorithms available in Petsc to do this? Can Slepc be used to 
calculate the null space of a matrix? I guess the eigenvectors corresponding to 
zero eigenvalues would serve this purpose? Literature is pointing me in the 
direction of more elaborate Moore-Spence algorithms. I am not sure why an 
eigensolver cannot be used for this purpose. 

    Any guidance would be greatly appreciated. 

Thanks,
Manav

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