The optimal affine transform for the extended Davis-Kahan bound is a concave-convex fractional program, solved globally and shown to give tighter eigenvector subspace bounds in SBM and PCA examples.
Distributed Energy Spectral E fficiency Optimization for Partial/Full Interference Alignment in M ulti-user Multi- relay Multi-cell MIMO Systems,
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Extending the Davis-Kahan theorem for comparing eigenvectors of two symmetric matrices II: Computation and Applications
The optimal affine transform for the extended Davis-Kahan bound is a concave-convex fractional program, solved globally and shown to give tighter eigenvector subspace bounds in SBM and PCA examples.