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The present article presents a summarizing view at differential-algebraic equations (DAEs) and analyzes how new application fields and corresponding mathematical models lead to innovations both in theory and in numerical analysis for this…

Numerical Analysis · Mathematics 2018-11-20 Jan Kleinert , Bernd Simeon

A thorough analysis of Lie super-bialgebra structures on Lie super-algebras osp(1|2) and super-e(2) is presented. Combined technique of computer algebraic computations and a subsequent identification of equivalent structures is applied. In…

q-alg · Mathematics 2015-06-26 Cezary Juszczak , Jan T. Sobczyk

Starting from the classical r-matrix of the non-standard (or Jordanian) quantum deformation of the sl(2,R) algebra, new triangular quantum deformations for the real Lie algebras so(2,2), so(3,1) and iso(2,1) are simultaneously constructed…

Quantum Algebra · Mathematics 2009-10-31 Francisco J. Herranz

A bicovariant calculus of differential operators on a quantum group is constructed in a natural way, using invariant maps from \fun\ to \uqg\ , given by elements of the pure braid group. These operators --- the `reflection matrix' $Y \equiv…

High Energy Physics - Theory · Physics 2009-10-22 Peter Schupp , Paul Watts , Bruno Zumino

We investigate the level set method (LSM) in a specific quantum context; namely the dipole transition moment for a system with a nontrivial Morse potential. We draw equal moment sets in the two-dimensional space of two important parameters…

Quantum Physics · Physics 2007-05-23 Fariel Shafee

In this work we are motivated by factorization of bosonic quantum dynamics and we study the corresponding Lie algebras, which can potentially be infinite dimensional. To characterize such factorization, we identify conditions for these Lie…

Quantum Physics · Physics 2025-01-07 David Edward Bruschi , André Xuereb , Robert Zeier

Dynamic power system models are instrumental in real-time stability, monitoring, and control. Such models are traditionally posed as systems of nonlinear differential algebraic equations (DAEs): the dynamical part models generator…

Systems and Control · Electrical Eng. & Systems 2024-02-02 Mohamad H. Kazma , Ahmad F. Taha

Some simple examples from quantum physics and control theory are used to illustrate the application of the theory of Lie systems. We will show, in particular, that for certain physical models both of the corresponding classical and quantum…

Mathematical Physics · Physics 2007-05-23 José F. Cariñena , Arturo Ramos

The study of ageing phenomena leads to the investigation of a maximal parabolic subalgebra of conf_3 which we call alt. We investigate its Lie structure, prove some results concerning its representations and characterize the related Appell…

Analysis of PDEs · Mathematics 2007-05-23 Malte Henkel , Rene Schott , Stoimen Stoimenov , Jeremie Unterberger

We present some recently discovered infinite dimensional Lie algebras that can be understood as extensions of the algebra Map(M,g) of maps from a compact p-dimensional manifold to some finite dimensional Lie algebra g. In the first part of…

High Energy Physics - Theory · Physics 2015-06-26 G. Ferretti

Let g be a complex, semisimple Lie algebra. Drinfeld showed that the quantum group associated to g is isomorphic as an algebra to the trivial deformation of the universal enveloping algebra of g. In this paper we construct explicitly such…

Representation Theory · Mathematics 2026-04-17 Andrea Appel , Sachin Gautam

We call a finite, spanning set of a semi-simple real Lie algebra a distinguished set if it satisfies the following property: The Lie bracket of any two elements out of the set is, up to some constant, another element in the set; conversely,…

Rings and Algebras · Mathematics 2020-04-28 Xudong Chen , Bahman Gharesifard

System identification through learning approaches is emerging as a promising strategy for understanding and simulating dynamical systems, which nevertheless faces considerable difficulty when confronted with power systems modeled by…

Systems and Control · Electrical Eng. & Systems 2023-12-14 Wenjie Mei , Muhammad Nadeem , MirSaleh Bahavarnia , Ahmad F. Taha

In this paper, we consider the problem of model equivalence for quantum systems. Two models are said to be (input-output) equivalent if they give the same output for every admissible input. In the case of quantum systems, the output is the…

Quantum Physics · Physics 2007-05-23 Francesca Albertini , Domenico D'Alessandro

We call a subalgebra $U$ of a Lie algebra $L$ a $CAP$-subalgebra of $L$ if for any chief factor $H/K$ of $L$, we have $H \cap U = K \cap U$ or $H+U = K+U$. In this paper we investigate some properties of such subalgebras and obtain some…

Rings and Algebras · Mathematics 2014-09-11 David A. Towers

It is well known that related with the irreducible representations of the Lie group $SO(2)$ we find a discrete basis as well a continuous one. In this paper we revisited this situation under the light of Rigged Hilbert spaces, which are the…

Mathematical Physics · Physics 2017-11-13 Enrico Celeghini , Manuel Gadella , Mariano A del Olmo

In this second part about dynamics of atomic system we revisit the logic application of $SU(2)$ dynamics. We reiterate that solution of quantum dynamics systems can be represented geometrically. Such geometric representations of solutions…

Quantum Physics · Physics 2019-09-06 Dawit Hiluf Hailu

Advances in quantum computing over the last two decades have required sophisticated mathematical frameworks to deepen the understanding of quantum algorithms. In this review, we introduce the theory of Lie groups and their algebras to…

Quantum Physics · Physics 2025-12-17 P. A. S. de Alcântara , Gabriel Audi , Leandro Morais

We characterize, in a purely algebraic manner, certain linear forms, called stable, on a Lie algebra. As an application, we determine the index of a Borel subalgebra of a semi-simple Lie algebra. Finally, we give an example of a parabolic…

Representation Theory · Mathematics 2007-05-23 Patrice Tauvel , Rupert W. T. Yu

Quantum Lie algebras are generalizations of Lie algebras whose structure constants are power series in $h$. They are derived from the quantized enveloping algebras $\uqg$. The quantum Lie bracket satisfies a generalization of antisymmetry.…

q-alg · Mathematics 2008-02-03 Gustav W. Delius