Defect
From Encyclopedia of Mathematics
deficiency, deficiency number, of an operator
The dimension 
of the deficiency subspace of the linear operator. Occasionally, in a wider sense, the deficiency of a linear manifold in a Hilbert space is defined to be the dimension of the orthogonal complement of this manifold.
How to Cite This Entry:
Defect. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Defect&oldid=31947
Defect. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Defect&oldid=31947
This article was adapted from an original article by V.I. Sobolev (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article