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Pairs of Projections: Geodesics, Fredholm and Compact Pairs
(Birkhauser Verlag Ag, 2014-08)
A pair (P,Q) of orthogonal projections in a Hilbert space H is called a Fredholm pair if QP:R(P)→R(Q)is a Fredholm operator. Let F be the set of all Fredholm pairs. A pair is called compact if P−Q is compact. Let C be the ...
Projections with fixed difference: a Hopf-Rinow theorem
(Elsevier Science, 2019-10)
The set D_A0 , of pairs of orthogonal projections (P,Q) in generic position with fixed difference P−Q=A_0, is shown to be a homogeneous smooth manifold: it is the quotient of the unitary group of the commutant {A_0}′ divided ...
INTERACTION ENERGIES IN NON WATSON-CRICK PAIRS: AN AB INITIO STUDY OF G·U AND U·U PAIRS
(Sociedad Chilena de Química, 2005)
Essentially orthogonal subspaces
(Theta Foundation, 2018-01)
We study the set C consisting of pairs of orthogonal projectionsP,Q acting in a Hilbert space H such that PQ is a compact operator. Thesepairs have a rich geometric structure which we describe here. They are partitionedin ...
Pure pairing modes in trapped fermion systems
(Springer/Plenum Publishers, 2013-02)
We present numerical predictions for the shape of the pairing fluctuations in harmonically trapped atomic 6Li with two spin projections, based on the fluiddynamical description of cold fermions with pairing interactions. ...
Redescription of Leptohyphes cornutus Allen, 1967 (Ephemeroptera: Leptohyphidae) and description of three related new species
(Magnolia Press, 2014-12)
Leptohyphes cornutus Allen from Brazil (Santa Catarina) and Misiones, Argentina is re-studied from new material and newly diagnosed as follows: tubercles on head (two pairs), pronotum (two pairs, anterior pair very small), ...
A pair production telescope for medium-energy gamma-ray polarimetry
(2014)
We describe the science motivation and development of a pair production telescope for medium-energy (∼5–200 MeV) gamma-ray polarimetry. Our instrument concept, the Advanced Energetic Pair Telescope (AdEPT), takes advantage ...
Paired Electrochemical Processes: Overview, Systematization, Selection Criteria, Design Strategies, and Projection
(Sociedad Química de México, 2018)