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Showing 1 to 20 of 2790 for “"operators"”.
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Closability of differential operators and subjordan operators
A (bounded linear) operator J on a Hilbert space is said to be jordan if J = S + N where S = S* and N² = 0. The operator T is subjordan if T is the restriction of a jordan operator to an invariant subspace, and pure subjordan if no nonzero restriction of T to an invariant subspace is jordan. The …
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Subnormal operators, hyponormal operators, and mean polynomial approximation
We prove quasisimilar subdecomposable operators without eigenvalues have equal essential spectra. Therefore, quasisimilar hyponormal operators have equal essential spectra. We obtain some results on the spectral pictures of cyclic hyponormal operators. An algebra homomorphism π from …
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Set Operators
<p>My research is centered on set operators. These are universally applicable regardless of the internal structure (numeric or non-numeric) of each individual observed datum. In our research, we have developed the theory of set operators to fill holes and gaps in observed data and eliminate paper …
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Toeplitz operators
Thesis: M.S., Massachusetts Institute of Technology, Department of Mathematics, 1977
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Design operators
Design operators is a thesis that investigates the nature and characteristics of the design process by examining the interaction of computation with architectural design. The effects of the introduction of these media in design are traced and their quantitative and qualitative characteristics are …
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Analytic Unitary Operators
… of the unit disc . For p = 2, the operators of this form are called analytic unitary operators. These operators form a group, which is denoted by OU(,S) and is a proper subgroup of the group U of unitary operators on H('2). The main objective of this work is to investigate operators …
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Generalized Subscalar Operators
Made available in DSpace on 2014-12-09T22:17:33Z (GMT). No. of bitstreams: 1 6612411.pdf: 2160632 bytes, checksum: 96387e019c9674ee78a0a0f927beb212 (MD5) Previous issue date: 1966
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Difference Raising Operators for Kirillov-Reshetikhin Characters and Parabolic Jing Operators
… to reformulate the difference raising operators presented by Di Francesco and Kedem. A connection between these operators and Shimozono and Zabrocki's parabolic Jing operators is presented. In particular, we find that these operators are a renormalization of a particular case of the …
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Polarization Operators in Superspace
… and discover a novel basis using polarization operators. We use polarization equivalence to establish a triangularity relation between the new basis and a known basis due to two groups of researchers Bergeron, Li, Machacek, Sulzgruber, and Zabrocki and Swanson and Wallach. Furthermore, we prove …
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Spaces of Compact Operators
… dissertation we study the structure of spaces of operators, especially the space of all compact operators between two Banach spaces X and Y. Work by Kalton, Emmanuele, Bator and Lewis on the space of compact and weakly compact operators motivates much of this paper. Let L(X,Y) be the Banach space …
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Operators on singular manifolds
… complex analysis and develop new structures of operators based on the Mellin transform and tools for iterating the calculus for higher singularities. We refer to the idea of interpreting boundary value problems (BVPs) in terms of pseudo-differential operators with a principal symbolic hierarchy, …
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Extreme Positive Linear Operators
Made available in DSpace on 2014-12-09T22:17:41Z (GMT). No. of bitstreams: 1 6808044.pdf: 4439781 bytes, checksum: 3672332eda28f28f87bd9d5ae1b3d9c4 (MD5) Previous issue date: 1967
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Differential operators on varieties,
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1972.
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Determinants of elliptic operators
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1989.
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The syntax of operators
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Linguistics and Philosophy, 1986.
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Algebras of Toeplitz Operators
In this work we examine C*-algebras of Toeplitz operators over the unit ball in ℂ<sup>n</sup> and the unit polydisc in ℂ². Toeplitz operators are interesting examples of non-normal operators that generate non-commutative C*-algebras. Moreover, in the nice cases (depending on the geometry of the …
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Functions of subnormal operators
… of the plane and B(H) the algebra of bounded operators in the separable Hilbert space H. If π: H<sup>∞</sup>(G)→B(H) is a norm-continuous homomorphism such that π(1) = 1 and π(z) is pure subnormal then π is weak-star, weak-star continuous. Moreover, if S is a pure subnormal contraction, the …
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Positive-off-diagonal Operators on Ordered Normed Spaces and Maximum Principles for M-Operators
… matrices can be generalized by corresponding operators on a partially ordered normed space. We extend results which are well-known for M-matrices to this more general setting. We investigate two different notions of an M-operator, where we focus on two questions: 1. For which types of …
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