$$A=\begin{bmatrix} 0.5 & 0.5 & & & & \\ & 0.5 & 0.5& & & \\ & & \ddots & \ddots & \\ & & & \ddots & 0.5\\ 0.5 & & & &0.5\\ \end{bmatrix}$$ I need to calculate the first and second singular values, and I know the first is $1$, please tell me how to get the second.
2026-03-25 23:35:07.1774481707
calculate the second singular value
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