Zoom in on step size given interval where Wolfe conditions can be satisfied
1 2 3 4 5 6 7 8 9 10 11 12 13 |
alpha |
vector of 2 step sizes, boundary of interval |
theta |
current parameter values |
f |
objective function |
gfn |
gradient function |
der |
direction derivative of f in Newton direction |
fval |
current function value |
fvals |
function values at boundary step sizes |
newton_step |
full Newton step direction |
maxsubsteps |
maximum number of substeps allowed |
... |
other arguments to f |
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