i fixed matrix multiplication notation, you can thank me later 😎😎

@acegikmo your "t"s are on the bottom and "b"s on the left

s/b/l/g
s/t/b/g

@dpwiz yeah?

@acegikmo so the l's would be on the left and b's on the bottom.

also, s/a/x/, so x's would be on a row/column intersections

@dpwiz what do you mean by s and x?

@acegikmo 's are just plural suffix.

x are variables in the middle matrix, that are now a

@dpwiz I'm confused lol, the matrix with all the 'a' is already aligned with the b matrix and the t matrix in terms of the coefficients in the polynomial, that's the point of the tweet

@acegikmo I'm talking about the variable names.
they can be position mnemonics so

the linear form would look like

l0 +
l1x0 + b l1 x1 +
....

This way one can easily sort them out to proper positions in the notation form and collect back to linear.