What does the symbol ‘!’ signify? Is it $ \text{argmin} $? For example, $ \| A x - y \| = \min! $.
$\begingroup$
$\endgroup$
2
-
$\begingroup$ regarding tikhonov regularization: ||Ax-y||^2+h^2||x||^2=min! $\endgroup$– nataliCommented Sep 30, 2014 at 0:21
-
3$\begingroup$ This question would be more readable if there were a reference to a place where the notation is used. $\endgroup$– S. Carnahan ♦Commented Sep 30, 2014 at 0:50
Add a comment
|
1 Answer
$\begingroup$
$\endgroup$
1
Yes, it is an alternative notation for argmin. Related discussion here.
It seems similar to the notation $\exists ! X $ for there is exactly one $ X $, since both notations refer to a selection of an element of a set.
answered Sep 30, 2014 at 0:30
-
$\begingroup$ thank you!! seems the notation has german roots? I had never seen it before $\endgroup$– nataliCommented Sep 30, 2014 at 0:34