Jonathan Feinberg

When TTR/Stieltjes used on multivariate expansions, all expansions are constructed using "tensor product". I am not familiar with any other approach. Total-order typically refers to the truncation scheme for which...

Legendre is only orthogonal if the distribution is uniform on the interval [-1, 1]. But yes, the difference between Legendre and the orthogonal polynomial is a simple linear mapping, so...

Spectral projection basically is a re-representing of a problem. It is a question of representation, and not really limited to "descrete expansions". PCE for example is a form of spectral...

Depends. If you know the true analytical answer, then of course. Just compare true values against PCE approximation, like done in the tutorials. If you are making a toy example,...

PRs with added functionality is very much welcomed. And having truncation schemes is also something that has been useful in my work. It might not be very well documented, but...

I am currently working on moving tutorial/cookbook recipes over to Jupyter Notebooks, and adding them back to the docs using nbsphinx. The idea is that Notebooks are much easier to...

You have to be a little more specific. What grid-sampling algorithm are we talking about? Link to what skopt is doing as would also be nice.

Grid was implemented to be able to mimic the code John Burkardt has made, and I did not think much to it as to what the source was as it...

Good. Feel free to post a reference here, if there is any.

In the root of repo there is a file `conftest.py`. Where you are running the tests, does this file exist in a folder below the test files?