symband
Linear Algebra for Symmetric Banded Matrices.
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function Afull=BandToSparse(Aband) convert a banded symmetric matrix to a sparse matrix
function Asparse=BandToSparse(Aband) convert a banded symmetric matrix to a sparse matrix
function Aband=FullToBand(Afull) convert a banded symmetric matrix to a sparse matrix
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SBFactor2
Not implemented.
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the Laplace equation on the unit square is discretized with nx and ny interiour grid points
solve A*x=lambda*B*x
estimate=gapTest(Lambda,err) compute the errors using the gap test Lambda and err are results of a call to [Lambda,{Ev,err}] = SBEig(A,V,tol)
