If $A$ and $B$ are $n \times n$ symmetric matrices with eigenvalues bigger or equal with $0$, how can I prove that $\det(A+B) \geq \det A +\det B$?
2026-03-28 18:16:10.1774721770
How to prove that $\det(A+B) ≥ \det A +\det B$?
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