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References to 'matrix norm'
1. example of Banach algebra which is not a $C^*$-algebra for any involution by asteroid
2. Gelfand spectral radius theorem by Andrea Ambrosio
3. matrix condition number by stevecheng
4. matrix condition number is greater or equal to $1$ by georgiosl
5. matrix exponential by mathcam
6. matrix p-norm by mathcam
7. self consistent matrix norm by rspuzio