For certain families of compact subsets the plane, isomorphism class algebra absolutely continuous functions on a set is completely determined by homeomorphism set. This analogous to Gelfand–Kolmogorov theorem for C(K) spaces. In this paper, we define family sets comprising finite unions convex curves and show that has ‘Gelfand–Kolmogorov’ property.

These notes are for a series of lectures given in functional analysis during Winter term of 2015. The two influences of the presentation here are Banach Algebra Techniques in Operator Theory (2e) by Ronald G. Douglas and Lecture Notes on the Spectral Theorem by Dana P. Williams. The notes start with a presentation of the two facts about nets that are required for the subject matter at hand. We ...

As studied by Jaulent in 1982, the inverse problem of lossy electric transmission lines is closely related to the inverse scattering of Zakharov-Shabat equations with two potential functions. Focusing on the numerical solution of this inverse scattering problem, we develop a fast one-shot algorithm based on the Gelfand-LevitanMarchenko equations and on some differential equations derived from t...

We study the moduli spaces of polygons in R and R, identifying them with subquotients of 2-Grassmannians using a symplectic version of the Gelfand-MacPherson correspondence. We show that the bending flows defined by Kapovich-Millson arise as a reduction of the Gelfand-Cetlin system on the Grassmannian, and with these determine the pentagon and hexagon spaces up to equivariant symplectomorphism....

Gelfand and Dikii gave a bosonic formal variational calculus in [5, 6] and Xu gave a fermionic formal variational calculus in [13]. Combining the bosonic theory of Gelfand-Dikii and the fermionic theory, Xu gave in [14] a formal variational calculus of super-variables. Fermionic Novikov algebras are related to the Hamiltonian super-operator in terms of this theory. A fermionic Novikov algebra i...

The classical theory of Gelfand pairs has found a wide range of applications, ranging from harmonic analysis on Riemannian symmetric spaces to coding theory. Here we discuss a generalization of this theory, due to Gelfand-Kazhdan, and Bernstein, which was developed to study the representation theory of p-adic groups. We also present some recent number-theoretic results, on local e-factors and o...

In this paper, a combination of algebraic and topological methods is applied to obtain new structural results on Gelfand residuated lattices. It demonstrated that Gelfand’s lattices strongly tied up with the hull–kernel topology. Particularly, it shown lattice if only its prime spectrum, equipped topology, normal. The class soft introduced, semisimple. are characterized using pure part filters....