Differences of idempotents in C*-algebras = Q* and I is the identity
operator in H. If U = P − Q is an isometry then U = U* is unitary and Q = I
On invertibility of some operator sumsWe study invertibility of some sums of linear bounded
operators on Hilbert space (Theorem 1). A
A non-commutative version of Nikishin's theorem algebra, L1(τ) be the space of integrable self-adjoint
operators, and S be the space of self
Eta-Invariants for Parameter-Dependent Operators Associated with an Action of a Discrete Group operators associated with an isometric action of a discrete group of polynomial growth on a smooth closed
Integrable products of measurable operators operators, assume also that M is the *-algebra of all τ-measurable
operators. We give the sufficient
Generalized Sobolev–Morrey estimates for hypoelliptic operators on homogeneous groups to the family of dilations (δλ) λ>. Consider the following hypoelliptic
operator with drift on GL=∑i,j=1maij
AN INDEX FORMULA FOR GROUPS OF ISOMETRIC LINEAR CANONICAL TRANSFORMATIONSWe define a representation of the unitary group U (n) by metaplectic
operators acting on L2(Rn
To the spectral theory of discrete hausdorff operators Hausdorf
operator in the Lebesgue space is an annulus (or a disc) centered at the origin, provided