Zobrazeno 1 - 10 of 135 pro vyhledávání: '"Matemàtiques i estadística::Àlgebra [Àrees temàtiques de la UPC]"'
1
Valuative trees over valued fields
Autor: Alberich-Carramiñana, Maria, Guàrdia, Jordi, Nart, Enric, Roé, Joaquim
Publikováno v: Journal of Algebra. 614:71-114
For an arbitrary valued field $(K,v)$ and a given extension $v(K^*)\hookrightarrow\Lambda$ of ordered groups, we analyze the structure of the tree formed by all $\Lambda$-valued extensions of $v$ to the polynomial ring $K[x]$. As an application, we f
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54dda21503860eb1327b282dd3e0d91f
https://doi.org/10.1016/j.jalgebra.2022.09.014
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2
Polyharmonic Green functions and nonlocal Bondi-Metzner-Sachs transformations of a free scalar field
Autor: Carles Batlle, Víctor Campello, Joaquim Gomis
Publikováno v: Physical Review
We express the nonlocal Bondi-Metzner-Sachs (BMS) charges of a free massless Klein-Gordon scalar field in 2 þ 1 in terms of the Green functions of the polyharmonic operators. Using the properties of these Green functions, we are able to discuss the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b875b80f97db0e9de0ea982de5fdb8c
https://doi.org/10.1103/physrevd.107.025010
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3
Passive sampling in reproducing kernel Hilbert spaces using leverage scores
Autor: Pere Giménez-Febrer, Alba Pagès-Zamora, Ignacio Santamaría
Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
This paper deals with the selection of the training dataset in kernel-based methods for function reconstruction, with a focus on kernel ridge regression. A functional analysis is performed which, in the absence of noise, links the optimal sampling di
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b555ef8bbacf5d16e67734c42cd6f2b
https://hdl.handle.net/2117/369614
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4
Spectra and eigenspaces of arbitrary lifts of graphs
Autor: Miguel Angel Fiol, Cristina Dalfó, Sona Pavlikova, Jozef Širáň
Publikováno v: Repositorio Abierto de la UdL
Universitad de Lleida
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Recercat. Dipósit de la Recerca de Catalunya
instname
Journal of Algebraic Combinatorics
This is a post-peer-review, pre-copyedit version of an article published in Journal of algebraic combinatorics. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10801-021-01049-3 We describe, in a very explicit way,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b48e76515c902f1aac64188c77dcc4b6
https://doi.org/10.1007/s10801-021-01049-3
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5
Hopf-Galois module structure of quartic Galois extensions of Q
Autor: Daniel Gil-Muñoz, Anna Rio
Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
© 2022 Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ Given a quartic Galois extension L/Q of number fields and a Hopf-Galois structure H on L/Q, we study the f
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09c2c0e61b0ef719fcf8e0e9a0675da2
https://hdl.handle.net/2117/367132
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6
Left braces of size 8p
Autor: Teresa Crespo, Daniel Gil-Muñoz, Anna Rio, Montserrat Vela
We describe all left braces of size 8p for p an odd prime different from 3 or 7 and validate the number given by Bardakov, Neschadim and Yadav. We give a characterization for isomorphism classes of a semidirect product of left braces and then the des
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14ce012065658b72d9f9849bd94199f5
http://arxiv.org/abs/2205.04201
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7
Study of roots of the Bernstein-Sato polynomial of plane curves
Autor: Gómez López, Roger
Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
En aquest projecte estudiem les arrels del polinomi de Bernstein-Sato en el cas de singularitats de corbes planes. Les arrels del polinomi de Bernstein-Sato estan relacionades amb els pols de la funció zeta complexa a través de continuació analít
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::34a6310be2e12a07f5fae887011d2a6b
https://hdl.handle.net/2117/365238
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9
Generating functions associated to Frobenius algebras
Autor: Josep Àlvarez Montaner
Publikováno v: Recercat. Dipósit de la Recerca de Catalunya
instname
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
We introduce a generating function associated to the homogeneous generators of a graded algebra that measures how far is this algebra from being finitely generated. For the case of some algebras of Frobenius endomorphisms we describe this generating
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5ab4e9cc138b815092126d1ef09e618
https://doi.org/10.1016/j.laa.2019.08.008
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10
Sufficient and necessary conditions for solution finding in valuation-based systems
Autor: Jordi Roca-Lacostena, Marc Pouly, Jesús Cerquides
Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
instname
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Recercat. Dipósit de la Recerca de Catalunya
Valuation algebras abstract a large number of formalisms for automated reasoning and enable the definition of generic inference procedures. Many of these formalisms provide some notion of solution. Typical examples are satisfying assignments in const
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3727ab982ce4626b50430c3bdfeb77a7
https://doi.org/10.1016/j.ijar.2019.08.006
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