Given a real-valued matrix $A=a_{i,j} \in M_{n,n}$
When: $||A||_2= \sqrt {\sum_{i=0}^n a^2_{i,j}} < + \infty$ ? Why?
2026-04-05 18:35:47.1775414147
Matrix norm can assume infinite values?
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Assuming you are asking why it is finite, it is a finite sum of finite elements and therefore finite.