-
```
A CRB model need to be able to tell its properties(linear vs non-linear, steady
vs time dependent...) so that the CRB framework can decide the strategy to
build the reduced basis.
```
Original …
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A bug report on [sage-devel](http://groups.google.com/group/sage-devel/browse_thread/thread/46124695d2f7469a) made me play around with the following example:
```
sage: R.=PolynomialRing(ZZ,2)
sage:…
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In the `_right_kernel_matrix` method of `matrix_integer_dense` there is a choice of 3 algorithms. With choice `algorithm='pari'` it calls the `matkerint` routine of PARI. According to the documentat…
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### Description:
Basically it looks a bit silly when a giant metropolis is easily reduced to a perfectly flat plain. Would be nice if you could set buildings to leave behind a ruin/some rubble, impas…
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Would be nice to add some utilities:
- Unfold a reduced list
- compare two kpoints, see if equivalent
- Put all kpoints in the BZ (instead of first unit cell). (Is accuracy increased when the sho…
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The first draft of the reference implementation has all arguments in the methods signature.
Check if the OVON dialog events or a decision therefore are suitable as a container.
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We should consider whether this piece of code can be completely rewritten:
https://github.com/sympy/sympy/blob/28c622d943072bb24d198d323ce8694b006e8960/sympy/solvers/solvers.py#L1869-L1896
So we hav…
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I am using QMCPACK 3.10.0 and I found that using energy_matrix = yes in the dm1b module produce vanishing 1b reduced energy density matrix (energy_matrix in *.stat.h5) and 1b reduced density matrix (n…
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**Is your feature request related to a problem? Please describe.**
```
# PROBLEM: elements in quotient of a PBW ring are not reduced
using Oscar;
QQxy, (x,y) = polynomial_ring(QQ, ["x","y"])…
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I am not sure what [this line](https://github.com/josephmure/openturns/blob/0ae3e83643240ddac3d7e3fe9dbe0ff9485c8103/lib/src/Uncertainty/Algorithm/MetaModel/Kriging/GeneralLinearModelAlgorithm.cxx#L74…