Now showing items 1-2 of 2

    • Characterizing intraregular semigroups by intuitionistic fuzzy sets 

      Hong, Yin; Fang, X. (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2005)
      Article
      Open Access
      In this paper, we give some theorems which characterizes the intraregular semigroups in terms of intuitionistic fuzzy left, right, and biideals.
    • Hu 1-2: A metal-poor bipolar planetary nebula with fast collimated outflows 

      Fang, X.; Guerrero, M.A.; Miranda, L.F.; Riera Mora, M. Ángeles; Velázquez, P.F.; Raga, A.C. (2015-10-27)
      Article
      Open Access
      © 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. We present narrow-band optical and near-IR imaging and optical long-slit spectroscopic observations of Hu 1-2, a Galactic ...