Paul Raynaud

LSR1Operator(1) fails the secant equation

6

Hello all, I did test the LSR1 operators for myself, and it seems that there is a problem with the LSR1Operator of dimension 1. In my work, I generate automatically...

Proposition to fix #225 fix LSR1Operator when s and y are collinear by cancelling data.scaling

Verify the LBFGSOperator update (push!)

1

Hello! Context: - I have to update several `LBFGSOperator` with differents `(s,y)` for a partitioned update [PLBFGS](https://github.com/paraynaud/PartitionedStructures.jl/blob/main/src/algorithms/PartitionedLOQuasiNewton.jl). - I cannot garantee that each `(s,y)` verify the cruvature condition. I wonder...

Compressed LBFGS (forward) operator

25

@dpo, this is the first version of an implementation of a compressed LBFGS (forward) operator. I made a first `structure`, as well as a `Matrix` interface, and a `mul!` method....

A general QNOperator

1

Hello all, I want to submit to you an idea about quasi-Newton operators. Currently, we have LBFGSOperator to build a convex quasi-Newton approximation and LSR1Operator to catch negative curvatures. I...

Replace `V(undef, nvar)` by `similar(nlp.meta.x0)` in `TrunkSolver`?

7

Hey guys (@dpo @tmigot), I was wondering why the `AbstractVector` required by `TrunkSolver` are defined with `V(undef, nvar)` and not with `similar(nlp.meta.x0)`? https://github.com/JuliaSmoothOptimizers/JSOSolvers.jl/blob/15550bdd2282c7fb1d7a5fcd78078ac271385b57/src/trunk.jl#L84 I'm currently working on PartitionedStructures.jl and PartiallySeparableNLPModels.jl...