1,721,105 research outputs found
Gaston Gaillard, Nobilisme
No full textChriste P. Gaston Gaillard, Nobilisme. In: Revue néo-scolastique de philosophie. 17ᵉ année, n°67, 1910. p. 428
A new tool in the classification of rational conformal field theories
No full textThe fact that in any rational conformal field theory (RCFT) four-point function on the sphere must satisfy an ordinary differential equation gives a simple condition on the conformal dimensions of primary fields. We discuss how this can help in the classification program of RCFT. As an example all associative fusion rules with less than four non-trivial primary fields and Nijk ≤ 1 are discussed. Another application to the classification of chiral algebras is briefly mentioned. © 1989
GNXGL/GN+L CONFORMAL FIELD-THEORIES AND THEIR MODULAR INVARIANT PARTITION-FUNCTIONS
No full textWe study a Feigin-Fuchs construction of conformal field theories based on a coset space, in terms of screened bosons and parafermions. This allows to get the formula for the conformal dimensions of primary operators. Lists of modular invariant partition functions for the , and Wess-Zumino-Witten models are given.
Besides the principal series of diagonal invariants, a complementary series exists for and , which is due to the outer
automorphism of the Kac-Moody algebra. Moreover, exceptional solutions appear at level 5, 9, 21 for , at level 3, 7, 12 for and at level 3, 4 for . From these modular invariants, those for the corresponding models are constructed
INTEGRABLE SYSTEMS AWAY FROM CRITICALITY - THE TODA FIELD-THEORY AND S-MATRIX OF THE TRICRITICAL ISING-MODEL
No full textThe tricritical Ising model, considered as coset construction with the exceptional group E7, is analyzed away from criticality. The additional conserved currents of the corresponding Toda system imply the factorization of the S-matrix, explicitly computed. We discuss the origin of higher-order poles on the physical sheet of the scattering amplitudes and their relevance to the three-point couplings of the theor
ELASTIC S-MATRICES IN (1 + 1) DIMENSIONS AND TODA FIELD-THEORIES
No full textParticular deformations of 2-D conformal field theory lead to integrable massive quantum field theories. These can be characterized by the relativistic scattering data. We propose a general scheme for classifying the elastic nondegenerate S-matrix in (1 + 1) dimensions starting from the possible boot-strap processes and the spins of the conserved currents. Their identification with the S-matrix coming from the Toda field theory is analyzed. We discuss both cases of Toda field theory constructed with the simply-laced Dynkin diagrams and the nonsimply-laced ones. We present the results of the perturbative analysis and their geometrical interpretations
G 2(2) as the automorphism group of the octonionic root system of E 7
Full text linkKarsch F, Koca M. G 2(2) as the automorphism group of the octonionic root system of E 7. Journal of Physics, A: Mathematical and General. 1990;23(21):4739-4750.A simple method is suggested for the construction of the seven-dimensional representation of the adjoint Chevalley group G 2(2), the automorphism group of the octonionic root system of E 7. The maximal subgroups of G 2(2) preserving the octonionic root systems of the maximal subgroups of E 7 are identified. Possible implications in physics are discussed
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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