Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Ivor Robinson"'
Autor:
Bogdan Nit, Ivor Robinson
Publikováno v:
General Relativity and Gravitation. 35:1865-1868
Algebraically special gravitational fields are described using algebraic and differential invariants of the Weyl tensor. A type III invariant is also given and calculated for Robinson-Trautman spaces.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bed4cef1f2a6bc9261105593c8f3e4eb
https://doi.org/10.1023/a:1026074400196
https://doi.org/10.1023/a:1026074400196
Autor:
Ivor Robinson, Bogdan G. Nita
Publikováno v:
Classical and Quantum Gravity. 17:2149-2152
A differential invariant is found for null fields of arbitrary spin. For null gravitational fields, the invariant is identified as that of Bicac and Pravda; its derivation from the Bel-Robinson tensor is given; and a simple expression is found for it
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d10e5952055ebdd78a7a0b5d57d9f39b
https://doi.org/10.1088/0264-9381/17/10/309
https://doi.org/10.1088/0264-9381/17/10/309
Autor:
Ivor Robinson, Andrzej Trautman
Publikováno v:
Journal of Mathematical Physics. 34:5391-5406
A new derivation is given of the Vahlen (1902) form of the local conformal transformations of Cn, v ■ (av+b)(cv+d)−1, where v∈Cn and a, b, c, d are suitable elements of the complex Clifford algebra Cl(n). The derivation is based on the homomorp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52ec1a06a98e39579f93f31d32793879
https://doi.org/10.1063/1.530311
https://doi.org/10.1063/1.530311
Autor:
Ivor Robinson, Edward P. Wilson
Publikováno v:
General Relativity and Gravitation. 25:225-244
With any shear-free congruence of null geodesics in a Lorentzian geometry there is associated a Cauchy-Riemann three-space; and in certain spacetimes including the Ricci-flat spacetimes with expanding null shear-free (n.s.f.) congruences the deviatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56c4e34f3e40b6325247a6e3032884f1
https://doi.org/10.1007/bf00756258
https://doi.org/10.1007/bf00756258
Autor:
Ivor Robinson
Publikováno v:
Topics in Mathematical Physics, General Relativity and Cosmology in Honor of Jerzy Plebanski.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca50b4eb0e2aecfba2737321a5740c1f
https://doi.org/10.1142/9789812772732_0004
https://doi.org/10.1142/9789812772732_0004
Autor:
Ivor Robinson
Publikováno v:
Classical and Quantum Gravity. 14:A331-A333
A completely symmetrical form of the Bel - Robinson (BR) tensor is shown to give rise, in n-dimensional Lorentzian space, to a gravitational density. For n = 4, a physical identification is proposed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::163719e71931e7265e02a49560d49609
https://doi.org/10.1088/0264-9381/14/1a/025
https://doi.org/10.1088/0264-9381/14/1a/025
Publikováno v:
AIP Conference Proceedings.
Scientists of 1965 see the universe with diverse eyes. They look with the two‐hundred‐inch pyrex mirror on top of Mount Palomar, with a hundred thousand gallons of cleaning fluid buried more than a mile underground, with scintillation counters fl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39098bb6030bad3ad798e0fba593cd2d
https://doi.org/10.1063/1.1419683
https://doi.org/10.1063/1.1419683
Autor:
Wolfgang Rindler, Ivor Robinson
Publikováno v:
On Einstein’s Path ISBN: 9781461271376
We here present an elementary account of the algebra and geometry of bivectors and of the biquaternions they give rise to. We then proceed to show how the latter allow a detailed study of the algebra and geometry of Lorentz transformations.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e1b74c34e2368a4967a93d9a35474fe
https://doi.org/10.1007/978-1-4612-1422-9_28
https://doi.org/10.1007/978-1-4612-1422-9_28
Publikováno v:
International Journal of Modern Physics A. 17:2733-2734
A class of solutions to the Bianchi identities in linearized gravitational theory is given which includes fields which vanish asymptotically and are nowhere singular.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::589bae1a1cab8c76a312df2d560315ea
https://doi.org/10.1142/s0217751x02011692
https://doi.org/10.1142/s0217751x02011692
Autor:
Paul MacAlevey, Ivor Robinson
Publikováno v:
Classical and Quantum Gravity. 15:3935-3936
An invariant of type N spacetimes is derived, and its relation to the invariant of Bicak and Pravda is examined.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78a7ce2a34b1abb6dde02a18741d20da
https://doi.org/10.1088/0264-9381/15/12/019
https://doi.org/10.1088/0264-9381/15/12/019