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seen Jun 1 at 23:26

Jan
3
comment Inverse of a matrix
Have you tried some low-dimensional cases with explicit values for $M$ and $N$?
Jun
20
comment What is name/references of inequality bounding sup-norm by $L_2$ norm (or a similar variant of this)?
For a finite dimensional space, this holds for any two norms. Just compare the unit balls.
Apr
27
answered Distributional/weak time derivative basic question
Dec
23
awarded  Supporter
Oct
31
awarded  Teacher
Oct
31
answered Explanation about frames as distinct from a co-ordinate system