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### Describe your issue.
I found this problem with handling events in `scipy.integrate.solve_ivp`.
I am solving a system of two coupled ODEs with a termination event triggered one of the evolved v…
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As Kevin has reported sometimes, k_aug does not behave as expected in other systems.
This requires a bit more testing, particularly with Pyomo.
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I've had some issues with choosing the "right" reference viscosity (in models with varying viscosity) in order to get convergence of the linear system and was wondering if there might be some way of i…
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For simple cases we can just differentiate through the DDE solver but if the DDE system contains parameter-dependent C1-discontinuities the forward sensitivities have jump discontinuities which, e.g.,…
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## Description
When solving an ODE using `ode_rk45` which takes the form
$\left.u^{\prime}=\frac{e^{-\lambda u^2}}{\lambda u\left(u^{-2}-2 \lambda\right)-u^{-3}}\left[\frac{3}{2}\Omega_m(1+z)^2+2 \O…
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**Is your feature request related to a problem? Please describe.**
Currently, the tolerance scheme is as follows:
```
Entries x1 and x2 are considered equal iff
|x1 - x2|
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Hi,
I read a little through the code and it seems like you're translating everything into CNF, which means you're potentially not using some of the more cutting edge solving techniques.
There ar…
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_Recommendation:_ Accept If Certain Minor Revisions Are Made
_Comments:_
... below is my review of the paper "Reproducible and
replicable CFD: It's harder than you think". This is a nice paper, and
…
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### Describe the bug
The LCAO calculation of daily test 004_Li128C75H100O75 is unstable.
[004_Li128C75H100O75.zip](https://github.com/deepmodeling/abacus-develop/files/12679264/004_Li128C75H100O75.z…
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I am running the model with the following parameters:
> **_2000 number of steps
> 900 step size (seconds)
> 2 species interpolation method (pw constant = 1, pw linear = 2)
> 2 conditions…