LBFGS solver part 1: chainable preconditioner. #980
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scale_by_lbfgs implements preconditioning a la lbfgs. lbfgs alias chains it with a linesearch (currently backtracking linesearch). PiperOrigin-RevId: 641262577
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LBFGS solver part 1: chainable preconditioner.
scale_by_lbfgs implements preconditioning a la lbfgs.
lbfgs alias chains it with a linesearch (currently backtracking linesearch).