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DMFieldEvaluate looks like it works with DMPlex and retrieves values, 1st and 2nd derivatives for a field.
https://petsc.org/release/manualpages/DM/DMFieldEvaluate/
Yes to having access to this fe…
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Sympy version: 1.12.1
To reproduce this issue:
(convolve(f,g,t,tau) implements the convolution integral $\int_{-\infty}^{\infty}f(\tau)g(t-\tau)d\tau$ for $f(t)$ and $g(t)$ )
```
import sympy as s…
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DynamicHMC does not deal well with incorrect deriatives. These can result from AD errors (conceptual errors in mature AD libraries are rare, but numerical corner cases can still happen), or bugs in ma…
tpapp updated
8 months ago
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If I understand correctly, fixing the value of a node also fixes the value of the derivatives at that node. This can make optimal control problems infeasible, especially when setting final constraint…
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Simplex noise is [said](http://weber.itn.liu.se/~stegu/simplexnoise/simplexnoise.pdf) to have "a well-defined and continuous gradient everywhere that can be computed quite cheaply." This is immensely …
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There's two components to this enhancement.
### Optimization
Define a `theta` and `eta` (inverse `theta`) function to transform parameters between an open bounded interval to a closed bounded inte…
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Please consider the following N-pendulum model (adapted from https://github.com/OpenModelica/OpenModelica/pull/10471#issuecomment-1753193826):
```modelica
model NPendulum
protected
constant Inte…
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I found that in teqp one of the models was failing because the derivatives of ``pow(delta, int)`` are not calculated properly when ``delta`` is ``0``. Here is a Catch2 test snippet showing the problem…