# GOLD

Provides parameters to tune the line search for the gold search. [Edit on GitHub]

## Keywords

- BRACK_LIMIT

- BRENT_MAX_ITER

- BRENT_TOL

- INITIAL_STEP

## Keyword descriptions

BRACK_LIMIT: real = 1.00000000E+002 [internal_cp2k]

  Usage: BRACK_LIMIT {real}

  Limit in 1D bracketing during line search in Conjugate Gradients Optimization. [Edit on GitHub]

BRENT_MAX_ITER: integer = 100

  Usage: BRENT_MAX_ITER {integer}

  Maximum number of iterations in brent algorithm (used for the line search in Conjugated Gradients Optimization) [Edit on GitHub]

BRENT_TOL: real = 1.00000000E-002 [internal_cp2k]

  Usage: BRENT_TOL {real}

  Tolerance requested during Brent line search in Conjugate Gradients Optimization. [Edit on GitHub]

INITIAL_STEP: real = 2.00000000E-001 [internal_cp2k]

  Usage: INITIAL_STEP {real}

  Initial step size used, e.g. for bracketing or minimizers. Might need to be reduced for systems with close contacts [Edit on GitHub]