However, if we assume a typo and the result should be \(egin{pmatrix} 0 \ 0 \ k \end{pmatrix}\) with \(k = egin{pmatrix} 0 \ 0 \ \mathbf{a} \cdot \mathbf{u} \end{pmatrix}\), but none matches.

Fri, 01 May 2026 20:32:59 +0000

Content under review