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## Summary
When trying to discretize a PDE with collocation using a large amount of points (20), imaginary numbers occur in the returned points. This can throw an error further down the road.
#…
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Post questions here for:
Manning and Schütze. 1999. Foundations of Statistical Natural Language Processing. MIT Press: selections from Chapter 5 (“Collocations”): 151-163, 172-176, 183-186.
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Decomposition of Random Errors Inherent to HOAPS-3.2 Near-Surface Humidity Estimates Using Multiple Triple Collocation Analysis
http://journals.ametsoc.org/doi/10.1175/JTECH-D-15-0122.1
A way …
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This morning I ran into a problem using opty for a simulation (Example 10.59 from Betts' book)
With the help from @tjstienstra I found the problem was that I used sympy.pi in the equations of motion.…
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Is there any issue with the 'multiCheb' method? It doesn't seem to be documented in the users' guide, but it seems to give good answers for the demo examples and for my particular optimal control prob…
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SNOPT is a very popular SQP method, used widely for direct collocation. It's not freely available, though. I recently got it working within PSOPT. It'd be nice if Simbody supported it (though, as with…
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Hi,
I wonder where the documents in "PINNs-master\Utilities\IRK_weights" and the data come from.
Thanks
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I have been reading online about solving DAE problems. It appears that BDF (Backward differentiation formula) implicit methods are able to be able to handle the incorporation of algebraic equations in…
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@jstac @albop @spencerlyon2 @mmcky
I have implemented a [generic solver](https://github.com/davidrpugh/bvp-solver) that uses projection methods to solve systems of non-linear differential equations …
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```r
collocations Error in qatd_cpp_collocations(x, types, id_ignore, min_count, size, if (method == :
std::bad_alloc
#> end_time - start_time
#> Time difference of 4.164202 mins
```
Don…