Greg1950

The attached .zip file contains an .html version of a Jupyter notebook. The .html explains my concern better than did the original posting. Sorry, but I'm only able to state...

Closed inadvertently. Now reopened.

utensil, I'm sorry but I don't know what a "PR" is. I'm just an aging mathematics hobbyist who took a couple of edX introductory computer science courses a few years...

Closed the issue by accident. See the zip file attached to my post on 2020-10-31 for files which contain my proposed fixes and which test those fixes.

Utensil Song, Perhaps in the future I will have sufficient time to learn the procedures you listed for a "pull request", but right now I am very busy, a state...

In my original posting I included an attachment, **Discrepancies between a linear tranformation and its matrix -- proposed fixes.pdf**. *I wish to take back my suggestion made therein for modifying...

The zip file I attached to my original post contained within it a file **Euclidean 3-space, spherical coordinates.ipynb** with some errors. The attached file corrects those errors. [Euclidean 3-space, spherical...

Hi Eric, Suppose one has a function $s$ such that $s(x) = x^2$. One doesn't actually have to give the function a name $s$ to be able to refer to...

Let a_list_of_lists = [ [a,b], [c,d] ] and consider the SymPy matrix created by the command Matrix(a_list_of_lists) . It will be a matrix whose first row is *a b* and...

On its face, post-multiplication of a matrix $M$ (standing for `self.mat`) by the metric tensor $G$ (standing for `self.Ga.g`), followed by a second post-multiplication by the reciprocal metric tensor $G^{-1}$...