Journal of Spectral Theory, ISSN 1664-039X, 2018, Volume 8, Issue 1, pp. 1 - 32

Suppose A is a compact normal operator on a Hilbert space H with certain lacunarity condition on the spectrum (which means, in particular, that its eigenvalues...

Rank one perturbation | Pólya peaks | Selfadjoint operator | Completeness of eigenvectors | ONE-DIMENSIONAL PERTURBATIONS | MATHEMATICS | rank one perturbation | completeness of eigenvectors | MATHEMATICS, APPLIED | Polya peaks

Rank one perturbation | Pólya peaks | Selfadjoint operator | Completeness of eigenvectors | ONE-DIMENSIONAL PERTURBATIONS | MATHEMATICS | rank one perturbation | completeness of eigenvectors | MATHEMATICS, APPLIED | Polya peaks

Journal Article

Israel Journal of Mathematics, ISSN 0021-2172, 1/2019, Volume 229, Issue 1, pp. 487 - 500

Avicou, Chalendar and Partington proved in 2015 [5] that an (unbounded) operator Af = G·f' on the classical Hardy space generates a C 0 semigroup of...

Algebra | Analysis | Theoretical, Mathematical and Computational Physics | Mathematics, general | Mathematics | Group Theory and Generalizations | Applications of Mathematics | MATHEMATICS | SEMIGROUPS | HARDY | SPACES | Mathematics - Functional Analysis

Algebra | Analysis | Theoretical, Mathematical and Computational Physics | Mathematics, general | Mathematics | Group Theory and Generalizations | Applications of Mathematics | MATHEMATICS | SEMIGROUPS | HARDY | SPACES | Mathematics - Functional Analysis

Journal Article

Complex Analysis and Operator Theory, ISSN 1661-8254, 4/2019, Volume 13, Issue 3, pp. 1325 - 1360

Let T be a bounded linear operator on a Hilbert space H such that $$\begin{aligned} \alpha \left[ T^*,T\right] :=\sum _{n=0}^\infty \alpha _n T^{*n}T^n\ge 0,...

Operator Theory | The Wiener algebra | Analysis | Similarity to a contraction | Dilation | Operator inequality | Mathematics, general | Mathematics | Functional model | MATHEMATICS | MATHEMATICS, APPLIED | Mathematics - Functional Analysis

Operator Theory | The Wiener algebra | Analysis | Similarity to a contraction | Dilation | Operator inequality | Mathematics, general | Mathematics | Functional model | MATHEMATICS | MATHEMATICS, APPLIED | Mathematics - Functional Analysis

Journal Article

Indiana University Mathematics Journal, ISSN 0022-2518, 1/2015, Volume 64, Issue 2, pp. 577 - 612

We introduce and study a class of operator tuples in complex Hilbert spaces, which we call spherical tuples. In particular, we characterize spherical...

Essential p-normality | Taylor spectrum | Joint q-isometry | Jointly hyponormal | Spherical tuple | CIRCULAR OPERATORS | joint q-isometry | C-ASTERISK-ALGEBRAS | SINGULAR INTEGRAL-OPERATORS | jointly hyponormal | MULTIPLICATION OPERATORS | COMMUTATORS | SPECTRAL PROPERTIES | UNIT BALL | WEIGHTED SHIFT | MATHEMATICS | essential p-normality | CLASS HANKEL-OPERATORS | BERGMAN SPACES

Essential p-normality | Taylor spectrum | Joint q-isometry | Jointly hyponormal | Spherical tuple | CIRCULAR OPERATORS | joint q-isometry | C-ASTERISK-ALGEBRAS | SINGULAR INTEGRAL-OPERATORS | jointly hyponormal | MULTIPLICATION OPERATORS | COMMUTATORS | SPECTRAL PROPERTIES | UNIT BALL | WEIGHTED SHIFT | MATHEMATICS | essential p-normality | CLASS HANKEL-OPERATORS | BERGMAN SPACES

Journal Article

Journal of Mathematical Analysis and Applications, ISSN 0022-247X, 03/2017, Volume 447, Issue 1, pp. 109 - 127

Given a Hilbert space operator T, the level sets of function ΨT(z)=‖(T−z)−1‖−1 determine the so-called pseudospectra of T. We set ΨT to be zero on the spectrum...

Approximation of spectra | Quasitriangular | Pseudospectra | Cowen–Douglas class | Nonnormal matrices | Finite section method | MATHEMATICS, APPLIED | Cowen-Douglas class | APPROXIMATION | SOLVABILITY COMPLEXITY INDEX | MATHEMATICS | RESOLVENT | SETS | NORM | SPECTRA | OPERATORS | Mathematics - Functional Analysis

Approximation of spectra | Quasitriangular | Pseudospectra | Cowen–Douglas class | Nonnormal matrices | Finite section method | MATHEMATICS, APPLIED | Cowen-Douglas class | APPROXIMATION | SOLVABILITY COMPLEXITY INDEX | MATHEMATICS | RESOLVENT | SETS | NORM | SPECTRA | OPERATORS | Mathematics - Functional Analysis

Journal Article

Journal of Mathematical Analysis and Applications, ISSN 0022-247X, 07/2018, Volume 463, Issue 1, pp. 345 - 364

We give some new criteria for a Hilbert space operator with spectrum on a smooth curve to be similar to a normal operator, in terms of pointwise and integral...

Normal operators | Resolvent estimates | Similarity | Pseudoanalytic continuation | TESTS | MATHEMATICS, APPLIED | SELF-ADJOINT | POLYNOMIALLY BOUNDED OPERATORS | WEAK CONTRACTION | MATHEMATICS | UNITARY | GROWTH | SETS | ISOMETRIES | Mathematics - Functional Analysis

Normal operators | Resolvent estimates | Similarity | Pseudoanalytic continuation | TESTS | MATHEMATICS, APPLIED | SELF-ADJOINT | POLYNOMIALLY BOUNDED OPERATORS | WEAK CONTRACTION | MATHEMATICS | UNITARY | GROWTH | SETS | ISOMETRIES | Mathematics - Functional Analysis

Journal Article

Advances in Mathematics, ISSN 0001-8708, 10/2016, Volume 302, pp. 740 - 798

We study spectral properties of nonselfadjoint rank one perturbations of compact selfadjoint operators. The problems under consideration include completeness...

Rank one perturbation | Selfadjoint operator | Spectral synthesis | Entire function | De Branges space | Inner function

Rank one perturbation | Selfadjoint operator | Spectral synthesis | Entire function | De Branges space | Inner function

Journal Article

Journal of Mathematical Analysis and Applications, ISSN 0022-247X, 04/2015, Volume 424, Issue 2, pp. 1404 - 1424

We study spectral properties of one-dimensional singular nonselfadjoint perturbations of an unbounded selfadjoint operator and give criteria for the...

Singular rank one perturbation | Selfadjoint operator | Krein class | Entire function | Inner function | MATHEMATICS | MATHEMATICS, APPLIED | DE-BRANGES SPACES | EXTENSIONS | MAJORANTS | MODEL

Singular rank one perturbation | Selfadjoint operator | Krein class | Entire function | Inner function | MATHEMATICS | MATHEMATICS, APPLIED | DE-BRANGES SPACES | EXTENSIONS | MAJORANTS | MODEL

Journal Article

Israel Journal of Mathematics, ISSN 0021-2172, 01/2019, Volume 229, Issue 1, p. 487

Avicou, Chalendar and Partington proved in 2015 [5] that an (unbounded) operator Af = G*f' on the classical Hardy space generates a C .sub.0 semigroup of...

Mathematical research | Group theory | Banach spaces | Research | Operator theory

Mathematical research | Group theory | Banach spaces | Research | Operator theory

Journal Article

Journal of Functional Analysis, ISSN 0022-1236, 08/2017, Volume 273, Issue 3, pp. 984 - 1019

Let Φ be a family of functions analytic in some neighborhood of a complex domain Ω, and let T be a Hilbert space operator whose spectrum is contained in Ω‾....

Spectral sets and dilations | Algebra generation | Separation of singularities | Schur–Agler algebra | SURGERY | RIEMANN SURFACES | RATIONAL DILATION | INTERSECTIONS | MATHEMATICS | NUMERICAL RANGE | ALGEBRAS | Schur-Agler algebra | CONNECTED DOMAIN | HILBERT-SPACE | DIRICHLET | OPERATORS | Algebra

Spectral sets and dilations | Algebra generation | Separation of singularities | Schur–Agler algebra | SURGERY | RIEMANN SURFACES | RATIONAL DILATION | INTERSECTIONS | MATHEMATICS | NUMERICAL RANGE | ALGEBRAS | Schur-Agler algebra | CONNECTED DOMAIN | HILBERT-SPACE | DIRICHLET | OPERATORS | Algebra

Journal Article

Journal of Cleaner Production, ISSN 0959-6526, 09/2017, Volume 162, pp. 380 - 390

Green Chemistry is one of the most important and practically used tools to integrate principles of sustainable development and green economy in the field of...

Deproteinized residues processing | Green chemistry | Algorithm of multi-criterion selection | Microbial conversion: efficiency assessment | BIOTECHNOLOGY | GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY | ACID | SUNFLOWER | METRICS | SUSTAINABILITY | ENVIRONMENTAL SCIENCES | ENGINEERING, ENVIRONMENTAL | PROTEIN EXTRACTION | DIETARY FIBER | BIOMASS | CHEMISTRY | Chemical industry | Herbicides | Pesticides industry | Algorithms | Analysis | Refuse and refuse disposal | Green technology | Raw materials

Deproteinized residues processing | Green chemistry | Algorithm of multi-criterion selection | Microbial conversion: efficiency assessment | BIOTECHNOLOGY | GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY | ACID | SUNFLOWER | METRICS | SUSTAINABILITY | ENVIRONMENTAL SCIENCES | ENGINEERING, ENVIRONMENTAL | PROTEIN EXTRACTION | DIETARY FIBER | BIOMASS | CHEMISTRY | Chemical industry | Herbicides | Pesticides industry | Algorithms | Analysis | Refuse and refuse disposal | Green technology | Raw materials

Journal Article

CardioVascular and Interventional Radiology, ISSN 0174-1551, 6/2015, Volume 38, Issue 3, pp. 560 - 564

This study was designed to assess the efficacy and safety of the ExoSeal vascular closure device (VCD) to achieve hemostasis in antegrade access of the...

Antegrade superficial femoral artery access | Medicine & Public Health | Nuclear Medicine | Imaging / Radiology | Cardiology | ExoSeal VCD | Ultrasound | CARDIAC & CARDIOVASCULAR SYSTEMS | SAFETY | RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | DISEASE | Radiography, Interventional | Hemostasis - physiology | Humans | Middle Aged | Punctures | Ultrasonography, Interventional | Male | Treatment Outcome | Fluoroscopy | Vascular Closure Devices | Femoral Artery - diagnostic imaging | Aged, 80 and over | Adult | Female | Aged | Retrospective Studies | Ultrasonography, Doppler, Duplex | Thrombin | Usage | Anticoagulants (Medicine) | FLUOROSCOPY | REVIEWS | PATIENTS | DESIGN | THROMBIN | FAILURES | TRANSFUSIONS | INDIUM 110 | HEMATOMAS | COMPUTERIZED TOMOGRAPHY | EQUIPMENT | ARTERIES | PATENTS | RADIOLOGY AND NUCLEAR MEDICINE | BLOOD

Antegrade superficial femoral artery access | Medicine & Public Health | Nuclear Medicine | Imaging / Radiology | Cardiology | ExoSeal VCD | Ultrasound | CARDIAC & CARDIOVASCULAR SYSTEMS | SAFETY | RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | DISEASE | Radiography, Interventional | Hemostasis - physiology | Humans | Middle Aged | Punctures | Ultrasonography, Interventional | Male | Treatment Outcome | Fluoroscopy | Vascular Closure Devices | Femoral Artery - diagnostic imaging | Aged, 80 and over | Adult | Female | Aged | Retrospective Studies | Ultrasonography, Doppler, Duplex | Thrombin | Usage | Anticoagulants (Medicine) | FLUOROSCOPY | REVIEWS | PATIENTS | DESIGN | THROMBIN | FAILURES | TRANSFUSIONS | INDIUM 110 | HEMATOMAS | COMPUTERIZED TOMOGRAPHY | EQUIPMENT | ARTERIES | PATENTS | RADIOLOGY AND NUCLEAR MEDICINE | BLOOD

Journal Article

Linear Algebra and Its Applications, ISSN 0024-3795, 12/2013, Volume 439, Issue 11, pp. 3332 - 3358

Let u(t)=−Fx(t) be the optimal control of the open-loop system x′(t)=Ax(t)+Bu(t) in a linear quadratic optimization problem. By using different complex...

Pole placement problem | Eigenvalue bounds | Continuous algebraic Riccati equation | Linear quadratic regulator | Exponential decay | MATHEMATICS, APPLIED | DISTANCE | STABILIZATION | SOLUTION BOUNDS | LYAPUNOV EQUATIONS | ALGEBRAIC RICCATI | RICCATI MATRIX EQUATION | SYSTEMS | UNCONTROLLABILITY | FEEDBACK | Control systems | Mathematics - Optimization and Control

Pole placement problem | Eigenvalue bounds | Continuous algebraic Riccati equation | Linear quadratic regulator | Exponential decay | MATHEMATICS, APPLIED | DISTANCE | STABILIZATION | SOLUTION BOUNDS | LYAPUNOV EQUATIONS | ALGEBRAIC RICCATI | RICCATI MATRIX EQUATION | SYSTEMS | UNCONTROLLABILITY | FEEDBACK | Control systems | Mathematics - Optimization and Control

Journal Article

The Journal of Physical Chemistry C, ISSN 1932-7447, 10/2017, Volume 121, Issue 40, pp. 22422 - 22433

Low operational stability is the main limiting factor for commercialization of the blue phosphorescent organic light emitting diodes (PhOLEDs). The high energy...

MATERIALS SCIENCE, MULTIDISCIPLINARY | AB-INITIO | DEGRADATION MECHANISMS | CHEMICAL-STABILITY | CHARGE-TRANSPORT | CHEMISTRY, PHYSICAL | NANOSCIENCE & NANOTECHNOLOGY | SEMICONDUCTOR-DEVICES | LIGHT-EMITTING-DIODES | ORGANIC ELECTROLUMINESCENT DEVICES | PHOSPHINE-OXIDE | ENERGY-TRANSFER | ELECTRONIC-STRUCTURE

MATERIALS SCIENCE, MULTIDISCIPLINARY | AB-INITIO | DEGRADATION MECHANISMS | CHEMICAL-STABILITY | CHARGE-TRANSPORT | CHEMISTRY, PHYSICAL | NANOSCIENCE & NANOTECHNOLOGY | SEMICONDUCTOR-DEVICES | LIGHT-EMITTING-DIODES | ORGANIC ELECTROLUMINESCENT DEVICES | PHOSPHINE-OXIDE | ENERGY-TRANSFER | ELECTRONIC-STRUCTURE

Journal Article

Journal of Mathematical Analysis and Applications, ISSN 0022-247X, 07/2013, Volume 403, Issue 2, pp. 464 - 476

This article analyzes Følner sequences of projections for bounded linear operators and their relationship to the class of finite operators introduced by...

Finite operators | Essentially normal operators | C-algebras | Non-normal operators | Følner sequences | Quasinormal operators | Cuntz algebras | MATHEMATICS, APPLIED | GENERATORS | C-ASTERISK-ALGEBRAS | MATHEMATICS | WEIGHTED SHIFTS | Folner sequences | STAR-ALGEBRAS

Finite operators | Essentially normal operators | C-algebras | Non-normal operators | Følner sequences | Quasinormal operators | Cuntz algebras | MATHEMATICS, APPLIED | GENERATORS | C-ASTERISK-ALGEBRAS | MATHEMATICS | WEIGHTED SHIFTS | Folner sequences | STAR-ALGEBRAS

Journal Article

Journal of the London Mathematical Society, ISSN 0024-6107, 04/2017, Volume 95, Issue 2, pp. 414 - 440

Given a complex domain Ω and analytic functions φ1,…,φn:Ω→D, we find geometric conditions allowing us to conclude that H∞(Ω) is generated by functions of the...

46J15 (primary) | 30H50 | 46J30 (secondary) | MATHEMATICS | BOUNDED HOLOMORPHIC-FUNCTIONS | EXTENSION

46J15 (primary) | 30H50 | 46J30 (secondary) | MATHEMATICS | BOUNDED HOLOMORPHIC-FUNCTIONS | EXTENSION

Journal Article

Extremophiles, ISSN 1431-0651, 5/2018, Volume 22, Issue 3, pp. 511 - 523

Spray drying is appropriate for the preservation of halophilic microorganisms due to the nature of these microorganisms, as they survive in adverse...

Life Sciences | Biochemistry, general | Biotechnology | Microbial Ecology | Halobacterium salinarum | Carotenoids | Microbiology | Spray drying | Halophiles, artificial neural network | SURVIVAL | BACTERIA | BIOCHEMISTRY & MOLECULAR BIOLOGY | MICROBIOLOGY | RADIATION | STRESSES | MICROORGANISMS | CULTIVATION | CULTURES | STRAIN | LACTOCOCCUS-LACTIS | Neural networks | Biodegradation | Salts | Cell survival | Preservation | Artificial neural networks | Crystals | Spray | Biomass | Optimization | Biological activity | Environmental conditions | Microorganisms | Storage | Samples | Pigments | Rehydration | Bacteria | Drying agents | Drying

Life Sciences | Biochemistry, general | Biotechnology | Microbial Ecology | Halobacterium salinarum | Carotenoids | Microbiology | Spray drying | Halophiles, artificial neural network | SURVIVAL | BACTERIA | BIOCHEMISTRY & MOLECULAR BIOLOGY | MICROBIOLOGY | RADIATION | STRESSES | MICROORGANISMS | CULTIVATION | CULTURES | STRAIN | LACTOCOCCUS-LACTIS | Neural networks | Biodegradation | Salts | Cell survival | Preservation | Artificial neural networks | Crystals | Spray | Biomass | Optimization | Biological activity | Environmental conditions | Microorganisms | Storage | Samples | Pigments | Rehydration | Bacteria | Drying agents | Drying

Journal Article

Nagoya Mathematical Journal, ISSN 0027-7630, 2009, Volume 195, pp. 57 - 75

For a continuous, nonvanishing complex-valued function g oil the real line, several notions of a, mean winding number are introduced. We give necessary...

ALMOST PERIODIC SYMBOLS | MATHEMATICS | COEFFICIENTS | SYSTEMS | ALGEBRAS | INTEGRAL-OPERATORS | 47A53 | 47B35 | 47G30

ALMOST PERIODIC SYMBOLS | MATHEMATICS | COEFFICIENTS | SYSTEMS | ALGEBRAS | INTEGRAL-OPERATORS | 47A53 | 47B35 | 47G30

Journal Article

Enzyme and Microbial Technology, ISSN 0141-0229, 12/2016, Volume 95, pp. 137 - 145

[Display omitted] The method for producing AgNPs by granules of activated sludge micromycetes with enhanced tolerance to metal ion toxicity − Penicillium...

NP green biosynthesis | Nanosilver | Nanotechnology | Silver nanoparticles | Biosynthesis of nanosilver | GOLD NANOPARTICLES | WASTE-WATER TREATMENT | FUNGUS | MICROORGANISMS | EXTRACELLULAR BIOSYNTHESIS | BIOLOGICAL SYNTHESIS | ACTINOMYCETE | BIOTECHNOLOGY & APPLIED MICROBIOLOGY | GREEN SYNTHESIS | Biotechnology | Green Chemistry Technology | Metal Nanoparticles - chemistry | Silver - chemistry | Fusarium - drug effects | Biomass | Penicillium - drug effects | Penicillium - metabolism | Fusarium - growth & development | Metal Nanoparticles - toxicity | Culture Media | Silver - toxicity | Penicillium - growth & development | Fusarium - metabolism | Sewage - microbiology | Hydrogen-Ion Concentration | Metal Nanoparticles - ultrastructure | Electrochemistry | Silver | Sludge | Pharmacy | Nanoparticles | Membrane proteins | Index Medicus

NP green biosynthesis | Nanosilver | Nanotechnology | Silver nanoparticles | Biosynthesis of nanosilver | GOLD NANOPARTICLES | WASTE-WATER TREATMENT | FUNGUS | MICROORGANISMS | EXTRACELLULAR BIOSYNTHESIS | BIOLOGICAL SYNTHESIS | ACTINOMYCETE | BIOTECHNOLOGY & APPLIED MICROBIOLOGY | GREEN SYNTHESIS | Biotechnology | Green Chemistry Technology | Metal Nanoparticles - chemistry | Silver - chemistry | Fusarium - drug effects | Biomass | Penicillium - drug effects | Penicillium - metabolism | Fusarium - growth & development | Metal Nanoparticles - toxicity | Culture Media | Silver - toxicity | Penicillium - growth & development | Fusarium - metabolism | Sewage - microbiology | Hydrogen-Ion Concentration | Metal Nanoparticles - ultrastructure | Electrochemistry | Silver | Sludge | Pharmacy | Nanoparticles | Membrane proteins | Index Medicus

Journal Article