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Перегляд Algebra and Discrete Mathematics, 2015, Vol. 19, Vol. 20 за автором "Catarino, P."

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2015, Vol. 19, Vol. 20 за автором "Catarino, P."

Сортувати за: Порядок: Результатів:

  • New families of Jacobsthal and Jacobsthal-Lucas numbers 
    Catarino, P.; Vasco, P.; Campos, H.; Aires, A.P.; Borges, A. (Algebra and Discrete Mathematics, 2015)
    In this paper we present new families of sequences that generalize the Jacobsthal and the Jacobsthal-Lucas numbers and establish some identities. We also give a generating function for a particular case of the sequences presented.
  • New families of Jacobsthal and Jacobsthal-Lucas numbers 
    Catarino, P.; Vasco, P.; Campos, H.; Aires, A.P.; Borges, A. (Algebra and Discrete Mathematics, 2015)
    In this paper we present new families of sequences that generalize the Jacobsthal and the Jacobsthal-Lucas numbers and establish some identities. We also give a generating function for a particular case of the sequences presented.
  • On inverse subsemigroups of the semigroup of orientation-preserving or orientation-reversing transformations 
    Catarino, P.; Higgins, P.M.; Levi, I. (Algebra and Discrete Mathematics, 2015)
    It is well-known [16] that the semigroup Tn of all total transformations of a given n-element set Xn is covered by its inverse subsemigroups. This note provides a short and direct proof, based on properties of digraphs of ...

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