Products of positive operators
1974 ◽
Vol 76
(2)
◽
pp. 415-416
◽
Keyword(s):
Let H be a complex Hilbert space. Recall that a bounded linear operator A, on H, is positive if (Ax, x) ≥ 0 (x ∈ H) (so that A = A* necessarily) and positive definite if A is positive and invertible.
1969 ◽
Vol 21
◽
pp. 1421-1426
◽
Keyword(s):
1969 ◽
Vol 12
(5)
◽
pp. 639-643
◽
2016 ◽
Vol 59
(2)
◽
pp. 354-362
◽
1977 ◽
Vol 29
(5)
◽
pp. 1010-1030
◽
2006 ◽
Vol 136
(5)
◽
pp. 935-944
◽