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```
def pde_system(x, y, f):
# 1D Convection-Diffusion
c = y[:, 0:1]
#constant velocity for now
u = torch.tensor(0.1)
du_x = 0.
# derivatives
dc_dt = dde.grad…
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The current fixed source random ray solver implementation in OpenMC (via #2829 and #2988) only allows for user definition of volumetric sources. If other types of sources are needed for a particular s…
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I just discovered how to find the closest point on a cubic curve using Newton–Raphson method. Please let me know if this is something that can be considered as an addition to bezierTools. Here is the …
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The solution to both of these problems is `-K/2`. In both cases CVXOPT runs into numerical issues for large `K`. The `get_problem_data` lines give the arguments passed to CVXOPT by CVXPY. CVXPY uses t…
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The COIN backend needs `sig_on`, `sig_off` throughout so that bounds errors do not crash Sage.
```
sage: p = get_solver(solver = "Coin")
sage: p.is_variable_continuous(1234567)
True
sage: p.add_lin…
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Symbolics.jl can't solve this equation but if I multiply both sides by `x^3` then it can. Wolfram Alpha can solve both. Symbolics.jl's docs say it can do polynomial equations, what's the problem here?…
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When I try to solve an LP using SCIP in my application, the solver returns SCIP_LPERROR. However, when I write the problem in .lp or .mps and use the same settings, scip solves the problem.
Do you ha…
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### Description
Co-simulation crash for both CVODE and Explicit Euler on Ubuntu 22.04, and I'm not sure how to come it closer/debug it further
Issue was first reported at FMPy, but is openmodellca…
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The initial value and gradient is undefined because the start value is `y = 0` and there is `1 / y^2`
This could be classified as expected behavior?
Ipopt is able to solve the model.
## Uno
…
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When a Ceres solver starts with a point just on a boundary (min or max limit), the Ceres does not do optimization steps and locks itself on the boundary point. The same happens randomly when Ceres get…