In [4] it was shown that an inverse limit with upper semicontinuous set-valued functions on intervals is connected if and only if it does not admit a CC-sequence. We introduce a related notion, a component base. Using this new tool we demonstrate how proofs of connectedness theorems can be simplified, and we prove a number of new results on connectedness. In particular, results relating to the size and number of components. (C) 2017 Elsevier B.V. All rights reserved.
机构:
Waseda Univ, Fac Sci & Engn, Shinkuju Ku, 3-4-1 Ohkubo, Tokyo 1698555, JapanWaseda Univ, Fac Sci & Engn, Shinkuju Ku, 3-4-1 Ohkubo, Tokyo 1698555, Japan
机构:
Univ Nacl Autonoma Mexico, Fac Ciencias, Ciudad Univ, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Ciudad Univ, Mexico City 04510, DF, Mexico
Juarez-Villa, Leonardo
Puga, Isabel
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机构:
Univ Nacl Autonoma Mexico, Fac Ciencias, Ciudad Univ, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Ciudad Univ, Mexico City 04510, DF, Mexico