bundles / scipy 1.17.1 / scipy / optimize / _linesearch / scalar_search_armijo

function

`scipy.optimize._linesearch:scalar_search_armijo`

source: /scipy/optimize/_linesearch.py :684

Signature

   def     scalar_search_armijo (    phi    ,    phi0    ,    derphi0    ,    c1    =  0.0001   ,    alpha0    =  1   ,    amin    =  0     )

Summary

Minimize over alpha, the function phi(alpha).

Extended Summary

Uses the interpolation algorithm (Armijo backtracking) as suggested by Wright and Nocedal in 'Numerical Optimization', 1999, pp. 56-57

alpha > 0 is assumed to be a descent direction.

Returns

: alpha
: phi1

Aliases

scipy.optimize._linesearch.scalar_search_armijo