Fides 0.6.2

• Add citation.cff file
• update description
• bugfixes for hybrid hessian approximation schemes

Fides 0.6.1

• fix and better checks for Hessians with NaN values
• add citation information

Fides 0.6.0

• Adds new rank 1/2 approximations (BB, BG, PBS, Broyden)
• Adds hybrid hessian approximation schemes (FX, GNSBFGS, SSM, TSSM, HybridUpdate renamed to HybridFixed)
• Adds the possibility to specify residual functions for non-linear least-squares problems, permitting better exploitation of problem properties.

Fides 0.5.1

• Changes the default subspace method to 2D by default

Fides 0.5.0

• Disable scaled gradient by default
• Change hybrid implementation from predefined iteration to dynamic scheme

Fides 0.4.2

• Fix gradient relative tolerance check for negative objective function values
• Updates to README
• Allow disabling scaled gradient steps

Fides 0.4.1

• Fix a bug where lanczos method would yield complex optimization variables
• Update readme

Fides 0.4.0

• use lanczos method to compute better descent solution if newton is not a descent direction (2D subspace minimization only)
• add additional safeguards for step acceptance and tr update
• add additional scaled gradient to stepback strategy
• add steinhaugs cg method as subspace solver
• fix 1d trust region analytical solution
• update documentation (thanks to @dweindl)

Fides 0.3.4

• Allow initialization of BFGS/SR1 with user provided hessian
• Restrict refinement step-back strategy to only be applied to the best proposal step

Fides 0.3.3

• Fixes an issue where the truncated base step was erroneously not included in the set of stepback proposals