Comparison toD&H Approach

Comparison toD&H Approach

Where XT and XR

are the tangent

vectors of X

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We can compare the tangent approach to that of D&H.

What we are looking for is a SX-1 projects “away” vectors that are in the tangent space of X. We can arrange that by constructing a matrix SX-1 whose eigenvectors include the tangent vectors and the corresponding eigenvalues are 0.