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Author : Atanas Atanasov
Publisher :
ISBN 13 : 9781470449513
Total Pages : pages
Book Rating : 4.4/5 (495 download)
Download or read book Interpolation for Normal Bundles of General Curves written by Atanas Atanasov and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Atanas Atanasov
Publisher : American Mathematical Soc.
ISBN 13 : 147043489X
Total Pages : 105 pages
Book Rating : 4.4/5 (74 download)
Download or read book Interpolation for Normal Bundles of General Curves written by Atanas Atanasov and published by American Mathematical Soc.. This book was released on 2019-02-21 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Given n general points p1,p2,…,pn∈Pr, it is natural to ask when there exists a curve C⊂Pr, of degree d and genus g, passing through p1,p2,…,pn. In this paper, the authors give a complete answer to this question for curves C with nonspecial hyperplane section. This result is a consequence of our main theorem, which states that the normal bundle NC of a general nonspecial curve of degree d and genus g in Pr (with d≥g+r) has the property of interpolation (i.e. that for a general effective divisor D of any degree on C, either H0(NC(−D))=0 or H1(NC(−D))=0), with exactly three exceptions.
Author : Charles Collot
Publisher : American Mathematical Soc.
ISBN 13 : 1470436264
Total Pages : 93 pages
Book Rating : 4.4/5 (74 download)
Download or read book On the Stability of Type I Blow Up for the Energy Super Critical Heat Equation written by Charles Collot and published by American Mathematical Soc.. This book was released on 2019-09-05 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors consider the energy super critical semilinear heat equation The authors first revisit the construction of radially symmetric self similar solutions performed through an ode approach and propose a bifurcation type argument which allows for a sharp control of the spectrum of the corresponding linearized operator in suitable weighted spaces. They then show how the sole knowledge of this spectral gap in weighted spaces implies the finite codimensional nonradial stability of these solutions for smooth well localized initial data using energy bounds. The whole scheme draws a route map for the derivation of the existence and stability of self-similar blow up in nonradial energy super critical settings.
Author : J. I. Hall
Publisher : American Mathematical Soc.
ISBN 13 : 1470436221
Total Pages : 186 pages
Book Rating : 4.4/5 (74 download)
Download or read book Moufang Loops and Groups with Triality are Essentially the Same Thing written by J. I. Hall and published by American Mathematical Soc.. This book was released on 2019-09-05 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1925 Élie Cartan introduced the principal of triality specifically for the Lie groups of type D4, and in 1935 Ruth Moufang initiated the study of Moufang loops. The observation of the title in 1978 was made by Stephen Doro, who was in turn motivated by the work of George Glauberman from 1968. Here the author makes the statement precise in a categorical context. In fact the most obvious categories of Moufang loops and groups with triality are not equivalent, hence the need for the word “essentially.”
Author : Raúl E. Curto
Publisher : American Mathematical Soc.
ISBN 13 : 1470436248
Total Pages : 100 pages
Book Rating : 4.4/5 (74 download)
Download or read book Matrix Functions of Bounded Type: An Interplay Between Function Theory and Operator Theory written by Raúl E. Curto and published by American Mathematical Soc.. This book was released on 2019-09-05 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, the authors study matrix functions of bounded type from the viewpoint of describing an interplay between function theory and operator theory. They first establish a criterion on the coprime-ness of two singular inner functions and obtain several properties of the Douglas-Shapiro-Shields factorizations of matrix functions of bounded type. They propose a new notion of tensored-scalar singularity, and then answer questions on Hankel operators with matrix-valued bounded type symbols. They also examine an interpolation problem related to a certain functional equation on matrix functions of bounded type; this can be seen as an extension of the classical Hermite-Fejér Interpolation Problem for matrix rational functions. The authors then extend the H∞-functional calculus to an H∞¯¯¯¯¯¯¯¯¯+H∞-functional calculus for the compressions of the shift. Next, the authors consider the subnormality of Toeplitz operators with matrix-valued bounded type symbols and, in particular, the matrix-valued version of Halmos's Problem 5 and then establish a matrix-valued version of Abrahamse's Theorem. They also solve a subnormal Toeplitz completion problem of 2×2 partial block Toeplitz matrices. Further, they establish a characterization of hyponormal Toeplitz pairs with matrix-valued bounded type symbols and then derive rank formulae for the self-commutators of hyponormal Toeplitz pairs.
Author : Dominic Joyce
Publisher : American Mathematical Soc.
ISBN 13 : 1470436450
Total Pages : 139 pages
Book Rating : 4.4/5 (74 download)
Download or read book Algebraic Geometry over C∞-Rings written by Dominic Joyce and published by American Mathematical Soc.. This book was released on 2019-09-05 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: If X is a manifold then the R-algebra C∞(X) of smooth functions c:X→R is a C∞-ring. That is, for each smooth function f:Rn→R there is an n-fold operation Φf:C∞(X)n→C∞(X) acting by Φf:(c1,…,cn)↦f(c1,…,cn), and these operations Φf satisfy many natural identities. Thus, C∞(X) actually has a far richer structure than the obvious R-algebra structure. The author explains the foundations of a version of algebraic geometry in which rings or algebras are replaced by C∞-rings. As schemes are the basic objects in algebraic geometry, the new basic objects are C∞-schemes, a category of geometric objects which generalize manifolds and whose morphisms generalize smooth maps. The author also studies quasicoherent sheaves on C∞-schemes, and C∞-stacks, in particular Deligne-Mumford C∞-stacks, a 2-category of geometric objects generalizing orbifolds. Many of these ideas are not new: C∞-rings and C∞ -schemes have long been part of synthetic differential geometry. But the author develops them in new directions. In earlier publications, the author used these tools to define d-manifolds and d-orbifolds, “derived” versions of manifolds and orbifolds related to Spivak's “derived manifolds”.
Author : Ines Kath
Publisher : American Mathematical Soc.
ISBN 13 : 1470441039
Total Pages : 84 pages
Book Rating : 4.4/5 (74 download)
Download or read book Compact Quotients of Cahen-Wallach Spaces written by Ines Kath and published by American Mathematical Soc.. This book was released on 2020-02-13 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indecomposable symmetric Lorentzian manifolds of non-constant curvature are called Cahen-Wallach spaces. Their isometry classes are described by continuous families of real parameters. The authors derive necessary and sufficient conditions for the existence of compact quotients of Cahen-Wallach spaces in terms of these parameters.
Author : Oskari Ajanki
Publisher : American Mathematical Soc.
ISBN 13 : 1470436833
Total Pages : 133 pages
Book Rating : 4.4/5 (74 download)
Download or read book Quadratic Vector Equations on Complex Upper Half-Plane written by Oskari Ajanki and published by American Mathematical Soc.. This book was released on 2019-12-02 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors consider the nonlinear equation −1m=z+Sm with a parameter z in the complex upper half plane H, where S is a positivity preserving symmetric linear operator acting on bounded functions. The solution with values in H is unique and its z-dependence is conveniently described as the Stieltjes transforms of a family of measures v on R. In a previous paper the authors qualitatively identified the possible singular behaviors of v: under suitable conditions on S we showed that in the density of v only algebraic singularities of degree two or three may occur. In this paper the authors give a comprehensive analysis of these singularities with uniform quantitative controls. They also find a universal shape describing the transition regime between the square root and cubic root singularities. Finally, motivated by random matrix applications in the authors' companion paper they present a complete stability analysis of the equation for any z∈H, including the vicinity of the singularities.
Author : Chen Wan
Publisher : American Mathematical Soc.
ISBN 13 : 1470436868
Total Pages : 90 pages
Book Rating : 4.4/5 (74 download)
Download or read book A Local Relative Trace Formula for the Ginzburg-Rallis Model: The Geometric Side written by Chen Wan and published by American Mathematical Soc.. This book was released on 2019-12-02 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Following the method developed by Waldspurger and Beuzart-Plessis in their proofs of the local Gan-Gross-Prasad conjecture, the author is able to prove the geometric side of a local relative trace formula for the Ginzburg-Rallis model. Then by applying such formula, the author proves a multiplicity formula of the Ginzburg-Rallis model for the supercuspidal representations. Using that multiplicity formula, the author proves the multiplicity one theorem for the Ginzburg-Rallis model over Vogan packets in the supercuspidal case.
Author : Tvrtko Tadić
Publisher : American Mathematical Soc.
ISBN 13 : 147043685X
Total Pages : 170 pages
Book Rating : 4.4/5 (74 download)
Download or read book Time-Like Graphical Models written by Tvrtko Tadić and published by American Mathematical Soc.. This book was released on 2019-12-02 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: The author studies continuous processes indexed by a special family of graphs. Processes indexed by vertices of graphs are known as probabilistic graphical models. In 2011, Burdzy and Pal proposed a continuous version of graphical models indexed by graphs with an embedded time structure— so-called time-like graphs. The author extends the notion of time-like graphs and finds properties of processes indexed by them. In particular, the author solves the conjecture of uniqueness of the distribution for the process indexed by graphs with infinite number of vertices. The author provides a new result showing the stochastic heat equation as a limit of the sequence of natural Brownian motions on time-like graphs. In addition, the author's treatment of time-like graphical models reveals connections to Markov random fields, martingales indexed by directed sets and branching Markov processes.
Author : Elizabeth Milićević
Publisher : American Mathematical Soc.
ISBN 13 : 1470436760
Total Pages : 101 pages
Book Rating : 4.4/5 (74 download)
Download or read book Dimensions of Affine Deligne–Lusztig Varieties: A New Approach Via Labeled Folded Alcove Walks and Root Operators written by Elizabeth Milićević and published by American Mathematical Soc.. This book was released on 2019-12-02 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: Let G be a reductive group over the field F=k((t)), where k is an algebraic closure of a finite field, and let W be the (extended) affine Weyl group of G. The associated affine Deligne–Lusztig varieties Xx(b), which are indexed by elements b∈G(F) and x∈W, were introduced by Rapoport. Basic questions about the varieties Xx(b) which have remained largely open include when they are nonempty, and if nonempty, their dimension. The authors use techniques inspired by geometric group theory and combinatorial representation theory to address these questions in the case that b is a pure translation, and so prove much of a sharpened version of a conjecture of Görtz, Haines, Kottwitz, and Reuman. The authors' approach is constructive and type-free, sheds new light on the reasons for existing results in the case that b is basic, and reveals new patterns. Since they work only in the standard apartment of the building for G(F), their results also hold in the p-adic context, where they formulate a definition of the dimension of a p-adic Deligne–Lusztig set. The authors present two immediate applications of their main results, to class polynomials of affine Hecke algebras and to affine reflection length.
Author :
Publisher :
ISBN 13 :
Total Pages : 984 pages
Book Rating : 4.3/5 (91 download)
Download or read book Mathematical Reviews written by and published by . This book was released on 2006 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joe Harris
Publisher : Montréal : Presses de l'Université de Montréal
ISBN 13 : 9782760606036
Total Pages : 138 pages
Book Rating : 4.6/5 (6 download)
Download or read book Curves in Projective Space written by Joe Harris and published by Montréal : Presses de l'Université de Montréal. This book was released on 1982-01-01 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Àlex Haro
Publisher : Springer
ISBN 13 : 3319296620
Total Pages : 267 pages
Book Rating : 4.3/5 (192 download)
Download or read book The Parameterization Method for Invariant Manifolds written by Àlex Haro and published by Springer. This book was released on 2016-04-18 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph presents some theoretical and computational aspects of the parameterization method for invariant manifolds, focusing on the following contexts: invariant manifolds associated with fixed points, invariant tori in quasi-periodically forced systems, invariant tori in Hamiltonian systems and normally hyperbolic invariant manifolds. This book provides algorithms of computation and some practical details of their implementation. The methodology is illustrated with 12 detailed examples, many of them well known in the literature of numerical computation in dynamical systems. A public version of the software used for some of the examples is available online. The book is aimed at mathematicians, scientists and engineers interested in the theory and applications of computational dynamical systems.
Author :
Publisher :
ISBN 13 :
Total Pages : 832 pages
Book Rating : 4.F/5 ( download)
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2001 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : H. Du Bois
Publisher :
ISBN 13 :
Total Pages : 416 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Magnetic Circuit in Theory and Practice written by H. Du Bois and published by . This book was released on 1896 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Henri DuBois
Publisher :
ISBN 13 :
Total Pages : 394 pages
Book Rating : 4.:/5 (41 download)
Download or read book The Magnetic Circuit in Theory and Practice written by Henri DuBois and published by . This book was released on 1896 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
