docs for MINRES, only for positive definite?

[Lisandro Dalcin]

I've noticed that the docs for MINRES say that the operator and the
preconditioner must be POSITIVE DEFINITE. But I understand MINRES is
tailored for the symmetric/hermitian-indefinite case.

Are the docs wrong? Or the actual code is a (very peculiar) MINRES variant?


-- 
Lisandro Dalcín
---------------
Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
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