Let
be a
-algebra,
then an element
is called a partial isometry if
.
Partial Isometry Element
This entry contributed by Mohammad Sal Moslehian
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References
Murphy, G. J.Referenced on Wolfram|Alpha
Partial Isometry ElementCite this as:
Moslehian, Mohammad Sal. "Partial Isometry Element." From MathWorld--A Wolfram Web Resource, created by Eric W. Weisstein. https://mathworld.wolfram.com/PartialIsometryElement.html