Zobrazeno 1 - 10
of 99
pro vyhledávání: '"V, Kopsky"'
Autor:
J.L. Verger-Gaugry, A. Yamamoto, S. C. Abrahams, V. A. Koptsik, J. L. Birman, V. Kopsky, F. Dénoyer, D. Weigel, T.J.B.M. Janssen
Publikováno v:
Acta Crystallographica Section A Foundations of Crystallography. 58:605-621
The Second Report of the Subcommittee on the Nomenclature of n-Dimensional Crystallography recommends specific symbols for R-irreducible groups in 4 and higher dimensions (nD), for centrings, for Bravais classes, for arithmetic crystal classes and fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::576454489484bc1109b205382b1de4d0
https://doi.org/10.1107/s010876730201379x
https://doi.org/10.1107/s010876730201379x
Publikováno v:
Ferroelectrics. 221:37-46
An overview is given of structural organization of fullerene crystals of C60, C70, C84, including the phases taking place at lower temperature when molecules order. Recently, evidences were obtained for a phase transition in C84 and for a metastabili
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a86557133d5d276be8c96b6768a93e99
https://doi.org/10.1080/00150199908016434
https://doi.org/10.1080/00150199908016434
Autor:
T, Janssen, J L, Birman, F, Dénoyer, V A, Koptsik, J L, Verger-Gaugry, D, Weigel, A, Yamamoto, S C, Abrahams, V, Kopsky
Publikováno v:
Acta crystallographica. Section A, Foundations of crystallography. 58(Pt 6)
The Second Report of the Subcommittee on the Nomenclature of n-Dimensional Crystallography recommends specific symbols for R-irreducible groups in 4 and higher dimensions (nD), for centrings, for Bravais classes, for arithmetic crystal classes and fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::7a693f7e22ce8229c677cbf9f4d3c3e5
https://pubmed.ncbi.nlm.nih.gov/12388880
https://pubmed.ncbi.nlm.nih.gov/12388880
Autor:
D.B. Litvin, V. Kopsky
Publikováno v:
Acta Crystallographica Section A Foundations of Crystallography. 52:C573-C573
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::272fb5b1c0cd4aec5024ced65725fb06
https://doi.org/10.1107/s0108767396076672
https://doi.org/10.1107/s0108767396076672
Autor:
V. Kopsky
Publikováno v:
Acta Crystallographica Section A Foundations of Crystallography. 52:C550-C550
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::597c15a246d2e988b811f118a85b9fca
https://doi.org/10.1107/s0108767396077586
https://doi.org/10.1107/s0108767396077586
Publikováno v:
Journal of Physics A: Mathematical and General. 20:6169-6184
The possible non-crystallographic point group of the decagonal quasicrystal phase of AI-Mn alloys has been shown by Bendersky to be either D,,, or C,,,,. For the physically irreducible representations of these groups, we derive the Clebsch-Gordan pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d5d2174b27e7185c85385f09cbd74a6
https://doi.org/10.1088/0305-4470/20/18/017
https://doi.org/10.1088/0305-4470/20/18/017
Autor:
V Kopsky
Publikováno v:
Journal of Physics A: Mathematical and General. 19:L181-L184
The author considers the consequences of Q-reducibility of a point group for the structure of a corresponding space group. First he shows that the space group is a subgroup of a direct product of two Euclidean groups of lower dimensions. He introduce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7d1c07ea030d29ca62a166b21220a29
https://doi.org/10.1088/0305-4470/19/4/002
https://doi.org/10.1088/0305-4470/19/4/002
Autor:
V Kopsky
Publikováno v:
Journal of Physics A: Mathematical and General. 12:L291-L294
It is known that a faithful representation of a finite group generates all its irreducible representations. A question about the validity of a more general theorem is raised and its role in the theory of phase transitions discussed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3e342cae169f82f1b7025be8fa76838
https://doi.org/10.1088/0305-4470/12/11/001
https://doi.org/10.1088/0305-4470/12/11/001
Autor:
V Kopsky
Publikováno v:
Journal of Physics A: Mathematical and General. 12:429-443
An extended integrity basis (EIB) of a polynomial algebra in a set of variables on which a finite group operates includes the ordinary integrity basis of invariants and linear integrity bases of covariants. The latter are defined as sets of covariant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09308a66d7539cd6332e74f7bf5e43d6
https://doi.org/10.1088/0305-4470/12/4/004
https://doi.org/10.1088/0305-4470/12/4/004
Autor:
V Kopsky
Publikováno v:
Journal of Physics C: Solid State Physics. 9:3405-3420
For pt.I see ibid., vol.9, no.18, p.3391 (1976). The magnetic crystal point groups are divided into the 25 isomorphic families and tables of Clebsch-Gordan (CG) products are given for the 11 families represented by crystallographic groups of proper r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::146c63f69079e6139c45b4c0d4004588
https://doi.org/10.1088/0022-3719/9/18/009
https://doi.org/10.1088/0022-3719/9/18/009