Does the following matrix have a specific name?
$$A(a,r)=\begin{bmatrix} 1 & a & a^2 & a^3 \\ 0 & r & 2ar & 3a^2r \\ 0 & 0 & r^2 & 3ar^2 \\ 0 & 0 & 0 & r^3 \end{bmatrix} $$
2026-04-08 03:46:24.1775619984
Does this upper triangular matrix have a specific name?
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Upper Pascal Matrix (generalized) seems to fit the description.