• Artículo
      Icon

      A Fredholm mapping of index zero 

      Soriano Arbizu, José María (Korean Mathematical Society, 2008)
      Sufficient conditions are given to assert that between any two Banach spaces over K Fredholm mappings share exactly N values in a specific open ball. The proof of the result is constructive and is based upon continuation methods.
    • Artículo
      Icon

      Compact mappings and proper mappings between Banach spaces that share a value 

      Soriano Arbizu, José María (Bulgarian Academy of Sciences, 2000)
      Sufficient conditions are given to assert that differentiable compact mappings and differentiable proper mappings between ...
    • Artículo
      Icon

      Weakly coercive mappings sharing a value 

      Soriano Arbizu, José María (Academy of Sciences of Czech Republic, Mathematical Institute, 2011)
      Some sufficient conditions are provided that guarantee that the difference of a compact mapping and a proper mapping ...