`scipy.optimize._linesearch:_zoom`

source: /scipy/optimize/_linesearch.py :532

Signature

   def     _zoom (    a_lo    ,    a_hi    ,    phi_lo    ,    phi_hi    ,    derphi_lo    ,    phi    ,    derphi    ,    phi0    ,    derphi0    ,    c1    ,    c2    ,    extra_condition      )

Summary

Zoom stage of approximate linesearch satisfying strong Wolfe conditions.

Extended Summary

Part of the optimization algorithm in scalar_search_wolfe2.

Notes

Implements Algorithm 3.6 (zoom) in Wright and Nocedal, 'Numerical Optimization', 1999, pp. 61.

Aliases

scipy.optimize._linesearch._zoom