Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Chandrashekar Devchand"'
Publikováno v:
Annali di Matematica Pura ed Applicata
An instanton $(E, D)$ on a (pseudo-)hyperk\"ahler manifold $M$ is a vector bundle $E$ associated to a principal $G$-bundle with a connection $D$ whose curvature is pointwise invariant under the quaternionic structures of $T_x M, \ x\in M$, and thus s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::803247402fa12d53afa424cfd6ba8fe6
https://doi.org/10.1007/s10231-019-00890-5
https://doi.org/10.1007/s10231-019-00890-5
Publikováno v:
Communications in Mathematical Physics
Special p-forms are forms which have components \phi_{\mu_1...\mu_p} equal to +1,-1 or 0 in some orthonormal basis. A p-form \phi\in \Lambda^p R^d is called democratic if the set of nonzero components {\phi_{\mu_1...\mu_p}} is symmetric under the tra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b190c040c357ab53fca055e904ebb28
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/42900
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/42900
Publikováno v:
Annals of Global Analysis and Geometry
We present a novel approach to the study of Yang-Mills instantons on quaternionic K\"ahler manifolds, based on an extension of the harmonic space method of constructing instantons on hyperk\"ahler manifolds. Our results establish a bijection between
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd45ccfcb27d12a928a3f7adc75d449e
https://hdl.handle.net/11590/370628
https://hdl.handle.net/11590/370628
Autor:
Jeremy Schiff, Chandrashekar Devchand
Publikováno v:
Communications in Mathematical Physics. 190:675-695
By relating the two-dimensional U(N) Principal Chiral Model to a simple linear system we obtain a free-field parametrisation of solutions. Obvious symmetry transformations on the free-field data give symmetries of the model. In this way all known `hi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed4a8ce2b60a8886b999fc225b396a3b
https://doi.org/10.1007/s002200050256
https://doi.org/10.1007/s002200050256
Autor:
Jean Nuyts, Chandrashekar Devchand
Publikováno v:
Nuclear Physics B. 503:627-656
We generalise the notions of supersymmetry and superspace by allowing generators and coordinates transforming according to more general Lorentz representations than the spinorial and vectorial ones of standard lore. This yields novel SO(3,1)-covarian
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68bbf2a0310eccf1bcc41d77e893f10e
https://doi.org/10.1016/s0550-3213(97)00503-8
https://doi.org/10.1016/s0550-3213(97)00503-8
Autor:
Andrea Spiro, Chandrashekar Devchand
Publikováno v:
Journal of Mathematical Physics
An explicit surjection from a set of (locally defined) unconstrained holomorphic functions on a certain submanifold of (Sp_1(C) \times C^{4n}) onto the set HK_{p,q} of local isometry classes of real analytic pseudo-hyperk\"ahler metrics of signature
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b608967467e980483304f889da3445e1
https://doi.org/10.1063/1.4964750
https://doi.org/10.1063/1.4964750
A special p-form is a p-form which, in some orthonormal basis {e_\mu}, has components \phi_{\mu_1...\mu_p} = \phi(e_{\mu_1},..., e_{\mu_p}) taking values in {-1,0,1}. We discuss graphs which characterise such forms.
Comment: 8 pages, V2: a texin
Comment: 8 pages, V2: a texin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99d83c51870c597d013420b2e73330ad
http://arxiv.org/abs/math/0604558
http://arxiv.org/abs/math/0604558
Publikováno v:
Communications in Mathematical Physics
Communications in Mathematical Physics, 2005, 253 (2), pp.385-422
Communications in Mathematical Physics, Springer Verlag, 2005, 253 (2), pp.385-422
Communications in Mathematical Physics, 2005, 253 (2), pp.385-422
Communications in Mathematical Physics, Springer Verlag, 2005, 253 (2), pp.385-422
A class of Z_2-graded Lie algebra and Lie superalgebra extensions of the pseudo-orthogonal algebra of a spacetime of arbitrary dimension and signature is investigated. They have the form g = g_0 + g_1, with g_0 = so(V) + W_0 and g_1 = W_1, where the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c35bf5af30e2733f2ca979de64c026f6
https://hal.science/hal-00139071
https://hal.science/hal-00139071
BPS solutions of 5-dimensional supergravity correspond to certain gradient flows on the product M x N of a quaternionic-Kaehler manifold M of negative scalar curvature and a very special real manifold N of dimension n >=0. Such gradient flows are gen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fdb9d833ba81f7fcb82b64567fc7c5f8
http://arxiv.org/abs/hep-th/0109094
http://arxiv.org/abs/hep-th/0109094
Autor:
Chandrashekar Devchand, Jean Nuyts
Self-duality equations for Yang-Mills fields in d-dimensional Euclidean spaces consist of linear algebraic relations amongst the components of the curvature tensor which imply the Yang-Mills equations. For the extension to superspace gauge fields, th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04404e59b1f43e490578d6794c62d960
http://arxiv.org/abs/hep-th/0109072
http://arxiv.org/abs/hep-th/0109072