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A Group-Theoretical Approach to the Periodic Table of
A Group-Theoretical Approach to the Periodic Table of

... and SO(3) ⊂ SO(4) ⊂ SO(4, 1) ⊂ SO(4, 2) ⊂ Sp(8, R) which are of relevance in the present work. 2.2 Representations of Lie groups and Lie algebras The concept of the representation of a group is essential for applications. A linear representation of dimension m of a group G is a homomorphic image of ...
full text (.pdf)
full text (.pdf)

... i.e. if ' holds under all interpretations over Kleene algebras with tests. We write KAT ' if ' holds under all interpretations over -continuous Kleene algebras with tests. ...
DEFINING RELATIONS OF NONCOMMUTATIVE ALGEBRAS
DEFINING RELATIONS OF NONCOMMUTATIVE ALGEBRAS

A group-theoretical approach to the periodic table
A group-theoretical approach to the periodic table

... and SO(3)  SO(4)  SO(4, 1)  SO(4, 2)  Sp(8, R) which are of relevance in the present work. 2.2 Representations of Lie groups and Lie algebras The concept of the representation of a group is essential for applications. A linear representation of dimension m of a group G is a homomorphic image of ...
full text (.pdf)
full text (.pdf)

... The *-continuity condition says that < ~ * > X is the join or least upper bound of the propositions X with respect to implication. A proof that *-cant implies ind can be found in [K1]. The axiom *-cant appeared in the original definition of dynamic algebras [K1], but later V. Pratt recommended ...
cylindric algebras and algebras of substitutions^) 167
cylindric algebras and algebras of substitutions^) 167

... 1.2.4 and 1.2.9], we have (ttI ) and (B). Finally, (jt3) holds by [6, 1.5.8(ii)], and (C) holds by L6, 1.5.7]. (ii) Let (A, +,-,-, ...
Leon Henkin and cylindric algebras. In
Leon Henkin and cylindric algebras. In

... The purely algebraic theory of cylindric algebras, exclusive of set algebras and representation theory, is fully developed in [71]. The parts of this theory due at mainly to Henkin are as follows. If A is a CAα and Γ = {ξ(0), . . . , ξ(m − 1)} is a finite subset of α, then we define c(Γ) a = cξ(0) · ...
Free Field Approach to 2-Dimensional Conformal Field Theories
Free Field Approach to 2-Dimensional Conformal Field Theories

... product algebra of screening currents is nonlocal this is a nontrivial problem. In fact there exists a set of "basis contours" within which products of screenings obey the algebra of the positive root generators of the quantum group CfJ q(g ), q =exp(i7r/(k+hv)). It follows then quite easily that gi ...
Exactly Solvable Problems in Quantum Mechanics
Exactly Solvable Problems in Quantum Mechanics

... solvability can be explained and derived in terms of hidden symmetry. However, even if it were true, it would probably not mean unifying all the ways to approach the problem. In fact, although many methods are based on symmetry, or – to be more specific – on the properties of Lie algebras, and altho ...
slides
slides

Converting Quadratic Relations To Factored Form
Converting Quadratic Relations To Factored Form

... have found the location of the vertex, it is possible to use its coordinates and the vertical stretch factor to rewrite the relation in vertex form. Both methods have their advantages and disadvantages, but should yield the same results. ...
Composition algebras of degree two
Composition algebras of degree two

... where n is a root of the equation 3^(1 — n) = 1 and 73 is the 3 by 3 identity matrix. The quadratic form w(x) = g trace(x2) allows composition for the new product *. A general definition of pseudo-octonions, valid over any field, can be found in [9]. Given 7 the algebraic closure of F, the forms of ...
DIALGEBRAS Jean-Louis LODAY There is a notion of
DIALGEBRAS Jean-Louis LODAY There is a notion of

A Quon Model
A Quon Model

... In case a quon is a qudit of degree d, one has a simple representation for a 1-quon basis: the interior of a hemisphere contains two charged strings, each linking two of the output points. The value of the charge on one sting may equal either 0, 1, . . . , d − 1 ∈ Zd , while the other string carries ...
pdf-file. - Fakultät für Mathematik
pdf-file. - Fakultät für Mathematik

... paths, and the s-condition. In 1984, Raymundo gave a survey lecture at the XVIIIth national congress of the Mexican Mathematical Society at Mérida [B10] under the title Incursions into the representation theory of algebras (in Spanish) about his own contributions as well as those of other Mexican m ...
Classical elliptic current algebras
Classical elliptic current algebras

... Green functions define the rLL-relations, the bialgebra structure and the analytic structure of half-currents. We do not write out explicitly the bialgebra structure related to the half-currents of the second classical elliptic algebra: it can be reconstructed along the lines of subsection 3.4. We d ...
Past Research
Past Research

... I work on the cohomology, structure, and representations of various types of rings, such as Hopf algebras and group-graded algebras. My research program has involved collaborations with many mathematicians, including work with postdocs and graduate students. Below is a summary of some of my past res ...
Full Text (PDF format)
Full Text (PDF format)

Tense Operators on Basic Algebras - Phoenix
Tense Operators on Basic Algebras - Phoenix

... Let us note that if a basic algebra A is commutative then the assigned lattice L(A) is distributive (see [7], Theorem 8.5.9). The propositional logic corresponding to a commutative basic algebra was already described (see [3]). Our aim is to introduce tense operators G, H , F , P on any basic algebr ...
INFINITESIMAL BIALGEBRAS, PRE
INFINITESIMAL BIALGEBRAS, PRE

... The main results of this paper establish connections between infinitesimal bialgebras, pre-Lie algebras and dendriform algebras, which were a priori unexpected. An infinitesimal bialgebra (abbreviated ǫ-bialgebra) is a triple (A, µ, ∆) where (A, µ) is an associative algebra, (A, ∆) is a coassociativ ...
On the Structure of Abstract Algebras
On the Structure of Abstract Algebras

... elements of ©, to be called the "proper domain" of/^ And, finally, let eachfi be a single-valued function of its proper domain to (£—in other words, let/^ assign to each sequence a of 2)^ a unique "/^-value" ft (a) in (J. Then the couple ((£, F) will be called an "abstract algebra" A, or for brevity ...
On bimeasurings
On bimeasurings

... 1.1. Notation All vector spaces (algebras, coalgebras, bialgebras) will be over a ground field k. If A is an algebra and C a coalgebra, then Hom(C, A) denotes the convolution algebra of all linear maps from C to A. The unit and the multiplication on A are denoted by : k → A and m: A ⊗ A → A; the cou ...
Connections between relation algebras and cylindric algebras
Connections between relation algebras and cylindric algebras

... An n-dimensional cylindric basis of A is a set of n-dimensional networks over A, with certain closure properties. Each such basis forms the set of atoms of a finite n-dimensional cylindric algebra. If this is representable, so is A. • The set of all 3-dimensional networks is a 3-dimensional cylindri ...
The development of hoops involves some neglected and some new
The development of hoops involves some neglected and some new

L. Fortunato - INFN Padova
L. Fortunato - INFN Padova

... • To them we can always associate an algebra that brings with itself a dynamical symmetry. • By knowing how to deal mathematically with the algebra one can get analytic solutions that can be compared with experimental data (not only: you can get also new, unexpected solutions!) • The algebra natural ...
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Vertex operator algebra

In mathematics, a vertex operator algebra (VOA) is an algebraic structure that plays an important role in conformal field theory and string theory. In addition to physical applications, vertex operator algebras have proven useful in purely mathematical contexts such as monstrous moonshine and the geometric Langlands correspondence.The related notion of vertex algebra was introduced by Richard Borcherds in 1986, motivated by a construction of an infinite-dimensional Lie algebra due to Frenkel. In the course of this construction, one employs a Fock space that admits an action of vertex operators attached to lattice vectors. Borcherds formulated the notion of vertex algebra by axiomatizing the relations between the lattice vertex operators, producing an algebraic structure that allows one to construct new Lie algebras by following Frenkel's method.The notion of vertex operator algebra was introduced as a modification of the notion of vertex algebra, by Frenkel, Lepowsky, and Meurman in 1988, as part of their project to construct the moonshine module. They observed that many vertex algebras that appear in nature have a useful additional structure (an action of the Virasoro algebra), and satisfy a bounded-below property with respect to an energy operator. Motivated by this observation, they added the Virasoro action and bounded-below property as axioms.We now have post-hoc motivation for these notions from physics, together with several interpretations of the axioms that were not initially known. Physically, the vertex operators arising from holomorphic field insertions at points (i.e., vertices) in two dimensional conformal field theory admit operator product expansions when insertions collide, and these satisfy precisely the relations specified in the definition of vertex operator algebra. Indeed, the axioms of a vertex operator algebra are a formal algebraic interpretation of what physicists call chiral algebras, or ""algebras of chiral symmetries"", where these symmetries describe the Ward identities satisfied by a given conformal field theory, including conformal invariance. Other formulations of the vertex algebra axioms include Borcherds's later work on singular commutative rings, algebras over certain operads on curves introduced by Huang, Kriz, and others, and D-module-theoretic objects called chiral algebras introduced by Alexander Beilinson and Vladimir Drinfeld. While related, these chiral algebras are not precisely the same as the objects with the same name that physicists use.Important basic examples of vertex operator algebras include lattice VOAs (modeling lattice conformal field theories), VOAs given by representations of affine Kac–Moody algebras (from the WZW model), the Virasoro VOAs (i.e., VOAs corresponding to representations of the Virasoro algebra) and the moonshine module V♮, which is distinguished by its monster symmetry. More sophisticated examples such as affine W-algebras and the chiral de Rham complex on a complex manifold arise in geometric representation theory and mathematical physics.
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