Alex Jones

@ChrisRackauckas looking at the wp setups, (1) I notice that fastbruss is not included everywhere, does this need fixing? Else, should I not include MOL in setups where fastbruss is...

Looks like the fails were caused by MethodOfLines not being in the manifest, I have run `Pkg.resolve()` The benchmarks are running on 1.7, shouldn't this be updated to 1.8?

Rebased

You mean this should be 1.8.2, or omitted? There are examples of both styles across the package

I will take a look at this

In the meantime, you should be aware that [MethodOfLines.jl](https://github.com/SciML/MethodOfLines.jl) now has support for periodic BCs. If this doesn't help you solve your problem we'd love to know why.

There's something strange going on, [here](https://github.com/xtalax/DiffEqOperators.jl/blob/completedifferences/test/DerivativeOperators/multi_dim_bc_test.jl) the first testset passes, wheras the second testset displays the issue you described though both contain periodic BCs

This was to test the constructor which supports different bcs along a boundary to facilitate space dependant robin. >But, even in the latter case, it gives me wrong results when...

``` using ModelingToolkit, SymbolicUtils, Test @parameters x, t @variables u(..) r = @rule u(t, 0) => 0 @test r(Symbolics.unwrap(u(t, 0))) !== nothing @test r(Symbolics.unwrap(u(t, 0.0))) !== nothing ``` Still fails

I am currently working on WENO schemes, which are good for discretizing systems such as this one. The upwind scheme (which we currently use) has exhibited instability for similar problems....