Module beta

Beta update methods for nonlinear CG

Beta update methods

TODO: Proper documentation.

References:

[0] Jorge Nocedal and Stephen J. Wright (2006). Numerical Optimization. Springer. ISBN 0-387-30303-0.

Structs

• FletcherReeves
  Fletcher and Reeves (FR) method TODO: Reference
• HestenesStiefel
  Hestenes and Stiefel (HS) method TODO: Reference
• PolakRibiere
  Polak and Ribiere (PR) method TODO: Reference
• PolakRibierePlus
  Polak and Ribiere Plus (PR+) method TODO: Reference