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https://hdl.handle.net/1822/65607
Registo completo
Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Falcão, M. I. | por |
dc.contributor.author | Miranda, Fernando | por |
dc.contributor.author | Severino, Ricardo | por |
dc.contributor.author | Soares, M. J. | por |
dc.date.accessioned | 2020-06-11T15:45:28Z | - |
dc.date.available | 2020-06-11T15:45:28Z | - |
dc.date.issued | 2019-06-03 | - |
dc.identifier.issn | 0308-1087 | por |
dc.identifier.uri | https://hdl.handle.net/1822/65607 | - |
dc.description.abstract | The literature on quaternionic polynomials and, in particular, on methods for finding and classifying their zero sets, is fast developing and reveals a growing interest in this subject. In contrast, polynomials defined over the algebra of coquaternions have received very little attention from researchers. One of the few exceptions is the very recent paper by Janovska and Opfer [Electron Trans Numer Anal. 2017;46:55-70], where, among other results, we can find a first attempt to prove that a unilateral coquaternionic polynomial of degree n has, at most, zeros. In this paper we present a full proof of this result, using a totally different and, from our point of view, much simpler approach. Also, we give a complete characterization of the zero sets of such polynomials and present a new result giving conditions which guarantee the existence of a special type of zeros. An algorithm to compute and classify all the zeros of a coquaternionic polynomial is proposed and several numerical examples are carefully constructed. | por |
dc.description.sponsorship | Research at CMAT was financed by Portuguese Funds through FCT -Fundacao para a Ciencia e a Tecnologia, within the [project number UID/MAT/00013/2013]. Research at NIPE was carried out within the funding with COMPETE reference number POCI-01-0145-FEDER-006683 [project number UID/ECO/03182/2013], with the FCT/MEC's (Fundacao para a Ciencia e a Tecnologia, I.P.) financial support through national funding and by the ERDF through the Operational Programme on 'Competitiveness and Internationalization - COMPETE 2020' under the PT2020 Partnership Agreement. | por |
dc.language.iso | eng | por |
dc.publisher | Taylor & Francis Ltd | por |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147370/PT | por |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147291/PT | por |
dc.rights | openAccess | por |
dc.subject | Coquaternions | por |
dc.subject | coquaternionic polynomials | por |
dc.subject | companion polynomial | por |
dc.subject | admissible classes | por |
dc.subject | 12E05 | por |
dc.subject | 15A66 | por |
dc.subject | 65H04 | por |
dc.title | The number of zeros of unilateral polynomials over coquaternions revisited | por |
dc.type | article | - |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | https://www.tandfonline.com/doi/full/10.1080/03081087.2018.1450828 | por |
oaire.citationStartPage | 1231 | por |
oaire.citationEndPage | 1249 | por |
oaire.citationIssue | 6 | por |
oaire.citationVolume | 67 | por |
dc.date.updated | 2020-06-10T18:41:18Z | - |
dc.identifier.doi | 10.1080/03081087.2018.1450828 | por |
dc.subject.fos | Ciências Naturais::Matemáticas | por |
dc.subject.wos | Science & Technology | - |
sdum.export.identifier | 5580 | - |
sdum.journal | Linear & Multilinear Algebra | por |
Aparece nas coleções: | CMAT - Artigos em revistas com arbitragem / Papers in peer review journals NIPE - Artigos em Revistas de Circulação Internacional com Arbitragem Científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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FalcaoMirandaSeverinoSoaresLAMA2019.pdf | 509,56 kB | Adobe PDF | Ver/Abrir |