Results 1 to 10 of about 11,813 (170)

Analytical expressions for the time evolution of spin systems affected by two or more interactions [PDF]

Magnetic Resonance
Analytical expressions for the description of the time evolution of spin systems beyond product–operator formalism (POF) can be obtained if a low-dimensional subspace of the Liouville space has been found in which the time evolution of the spin system ...
G. Hempel
doaj   +2 more sources

Improving the representation and conversion of mathematical formulae by considering their textual context. [PDF]

TUGboat (Provid), 2018
Mathematical formulae represent complex semantic information in a concise form. Especially in Science, Technology, Engineering, and Mathematics, mathematical formulae are crucial to communicate information, e.g., in scientific papers, and to perform ...
Schubotz M, Greiner-Petter A, Scharpf P, Meuschke N, Cohl HS, Gipp B.   +5 more
europepmc   +2 more sources

Multiple commutator formulas [PDF]

Israel Journal of Mathematics, 2012
Let A be a quasi-finite R-algebra (i.e., a direct limit of module finite algebras) with identity. Let I_i, i=0,...,m, be two-sided ideals of A, \GL_n(A,I_i) the principal congruence subgroup of level I_i in GL_n(A) and E_n(A,I_i) be the relative elementary subgroup of level I_i.
Hazrat, Roozbeh (R16959), Zhang, Zuhong
openaire   +4 more sources

Symmetries, Currents and Conservation Laws of Self-Dual Gravity [PDF]

, 1996
We describe an infinite-dimensional algebra of hidden symmetries for the self-dual gravity equations. Besides the known diffeomorphism-type symmetries (affine extension of w(infinity) algebra), this algebra contains new hidden symmetries, which are an ...
A.D. Popov, Alvarez, Alvarez, Ashtekar, Atiyah, Bakas, Bakas, Bakas, Bakas, Bergshoeff, Berkovits, Berkovits, Berkovits, Bianchi, Boyer, Boyer, Boyer, Boyer, Boyer, Brezin, Castro, Chakravarty, Chau, de Vega, Devchand, Dolan, Dolan, Duff, Eichenherr, Font, Gegenberg, Gibbons, Gibbons, Gibbons, Gibbons, Giveon, Grant, H. Römer, Hassan, Hawking, Hitchin, Hoppe, Hull, Hull, Hull, Husain, Husain, Husain, Ivanova, Ivanova, Ivanova, Ivanova, Kiritsis, Ko, Kutasov, Legaré, Legaré, Lüscher, M. Bordemann, Mason, Mason, Newell, Ooguri, Ooguri, Ooguri, Park, Park, Park, Park, Penrose, Plebanski, Plebański, Popov, Prasad, Schwarz, Schwarz, Schwarz, Sen, Sfetsos, Strachan, Takasaki, Takasaki, Takasaki, Tod, Ueno, Vafa, Ward, Ward, Ward, Wu, Yamagishi, Yamagishi, Zakharov   +92 more
core   +5 more sources

Commuting extensions and cubature formulae [PDF]

Numerische Mathematik, 2005
34 pages, 3 figures ...
Degani, Ilan, Schiff, Jeremy, Tannor, David J.   +2 more
openaire   +3 more sources

Multiple commutator formulas for unitary groups [PDF]

Israel Journal of Mathematics, 2017
arXiv admin note: text overlap with arXiv:0911 ...
Hazrat, Roozbeh (R16959), Vavilov, Nikolai, Zhang, Zuhong   +2 more
openaire   +4 more sources

Product formulas for exponentials of commutators [PDF]

Journal of Mathematical Physics, 2013
We provide a recursive method for systematically constructing product formula approximations to exponentials of commutators, giving approximations that are accurate to arbitrarily high order. Using these formulas, we show how to approximate unitary exponentials of (possibly nested) commutators using exponentials of the elementary operators, and we ...
Childs, Andrew M., Wiebe, Nathan
openaire   +2 more sources

The yoga of commutators [PDF]

, 2011
In the present paper we discuss some recent versions of localisation methods for calculations in the groups of points of algebraic-like and classical-like groups. Namely, we describe relative localisation, universal localisation, and enhanced versions of
Hazrat, R., Stepanov, A. V., Vavilov, N. A., Zhang, Z.   +3 more
core   +1 more source

Approximate double commutants and distance formulas [PDF]

Operators and Matrices, 2014
We extend work of the first author concering relative double commutants and approximate double commutants of unital subalgebras of unital C*-algebras, including metric versions involving distance estimates. We prove metric results for AH subalgebras of von Neumann algebras or AF subalgebras of primitive C*-algebras.
Hadwin, Don, Shen, Junhao
openaire   +2 more sources

Differential Invariants of Conformal and Projective Surfaces [PDF]

, 2007
We show that, for both the conformal and projective groups, all the differential invariants of a generic surface in three-dimensional space can be written as combinations of the invariant derivatives of a single differential invariant. The proof is based
Hubert, Evelyne, Olver, Peter J.
core   +8 more sources