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dReal returns unsat on the following formula
(set-logic QF_NRA)
(declare-fun omega0 () Real)
(assert (>= omega0 0.49999952316284185))
(assert (= omega0 0.5)))
(check-sat)
(exit)
and it's clearly wro…
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**Is your feature request related to a problem? Please describe.**
I'm not sure if this is a Clarabel or CVXPY problem, maybe a bit of both, but I'll post it here first. I noticed that sometimes Clar…
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I tried out the 'CTVsuggest' package, as requested by Achim Zeileis.
For the Optimization task view, it suggested the following packages:
CTVsuggest(taskview = "Optimization", n = 40)
When…
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Perform solution checking. Both us and solvers can be buggy.
This would be a partial remedy for numerical issues as well, see ampl/escrow/issues/102.
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Hi, I am in Russ' underactuated robotics class and I was told I should post this here.
In our problem set, we are simulating a system with two worlds and a rocket. I specify an initial condition a…
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### Description
In some cases (see e.g. #7734) derivatives are involved in nonlinear strong components. If not solved with the appropriate precision, they may fool the ODE solvers's error control m…
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Maybe we should add an option to show which constraints are violated in the case of an infeasible problem?
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## Reason
Mortar contact formulations generally results in ill-conditioned saddle point systems that are numerically difficult to converge (see e.g. Computational Contact Mechanics by Peter Wiggers…
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- [x] Transform
- [x] SDF
- [ ] Euler fluid solid coupling
- [x] refractor grid
- [x] add staggered grid
- [x] SDF rasterize to world space
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When I use `CVODE_BDF` to solve a coupled stiff ODE (a PDE discretized using method of lines) with around ~1000 variables, is it necessary to provide the exact Jacobian or is it sufficient to just pro…