David Widmann
David Widmann
[asdf-vm](https://asdf-vm.com/) allows to specify project dependencies such as python, poetry, nodejs, ..., and julia in [`.tool-versions` files](https://asdf-vm.com/manage/configuration.html#tool-versions). This is very convenient in particular in projects that involve multiple tools besides...
Given the [definitions of `==` and `isequal` in ForwardDiff#master](https://github.com/JuliaDiff/ForwardDiff.jl/blob/cbb2733e9941a91862f137aa49cc47aca1761cff/src/dual.jl#L400-L409), the PR reverts https://github.com/JuliaDiff/DualNumbers.jl/commit/337539f32622b8d713a7ea122aeaafb4f1e0de3b (see #10) and defines both `==(x, y)` and `isequal(x, y)` in terms of both `value(x)` and `epsilon(x)`...
The following example shows that - similar to the example in the [tests](https://github.com/SciML/DelayDiffEq.jl/blob/master/test/interface/ad.jl) - ForwardDiff and finite differencing (here FiniteDifferences, in the tests FiniteDiff) produces similar gradients and Jacobians. However,...
We use the interpolation interface for evaluating the history function but we don't support efficient evaluations for multiple time points yet.
I would like to try some neat heuristic that's used in RADAR5 and that I assume could be helpful for non-smooth solutions such as the artificial example in RADAR5 due...
As discussed in https://github.com/JuliaDiffEq/DiffEqProblemLibrary.jl/pull/39, especially for the history function it seems reasonable to pass the full integrator as argument instead of only the parameters, i.e., having `h(integrator, t)` instead of...
In my opinion, DelayDiffEq is a lot more complicated than it should be, which also makes analysis and fixes more difficult. Hence I started to think about how the current...
I started playing around a bit more with stiff DDEs, and think www.unige.ch/~hairer/radar5-v2.1.tar and accompanying publications contain some nice examples (which should be added to DiffEqProblemLibrary as well, I guess)....
**Is your feature request related to a problem? Please describe.** I'm surprised that `ODEFunctionExpr(sys)` returns an expression that only sets a subset of properties of `sys`, and in particular does...
Some of the math code (`prod` and `factorial`) in the examples in https://github.com/JuliaMath/SpecialFunctions.jl/pull/462 was not typeset in LaTeX syntax which arguably looks a bit broken. Initially, I changed it to...