Show that the function from Rnxn to R given by ||A||max = max |aj| is not a norm by stating which of the 4 matrix norm conditions it fails to satisfy, and by demonstrating this fact via an example.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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**Question:**

Show that the function from \( \mathbb{R}^{n \times n} \) to \( \mathbb{R} \) given by

\[
\|A\|_{\text{max}} = \max_{i,j} |a_{ij}|
\]

is not a norm by stating which of the 4 matrix norm conditions it fails to satisfy, and by demonstrating this fact via an example.
Transcribed Image Text:**Question:** Show that the function from \( \mathbb{R}^{n \times n} \) to \( \mathbb{R} \) given by \[ \|A\|_{\text{max}} = \max_{i,j} |a_{ij}| \] is not a norm by stating which of the 4 matrix norm conditions it fails to satisfy, and by demonstrating this fact via an example.
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