HIGHLIGHTS
- who: IJM and colleagues from the (UNIVERSITY) have published the article: RIESZ BASES AND POSITIVE OPERATORS ON HILBERT SPACE, in the Journal: (JOURNAL)
SUMMARY
Let H denote a Hilbert space (assumed real, for notational convenience) with inner product (·, ·) and let {xi } be a basis for H having coefficient functionals {fi } denoted by {xi, fi }. The authors say that {xi, fi } is a Riesz basis for H if it has the property that ai xi converges in H if and only if {ai } is in the sequence space l2. The result below (Theorem 2 . . .
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