I know that the spectral radius of a matrix is equal to the matrix's max absolute eigenvalue, and the equation to calculate the 2-norm of a matrix. But, I am not sure if those information are helpful to solve this problem.
2026-02-22 21:21:23.1771795283
Prove or disprove that $\rho(A) = \| A \|_2$ for any real symmetric matrix $A$
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