We obtain criteria for equivalence, covariance, commutativity, and idempotent additivity of roundings in ordered topological spaces. For some special classes of spaces, we obtain the characterization of roundings as extreme points of the set of nonenlarging isotone mappings and prove their Hyers-Ulam stability. A functional model of interval rounding is constructed.
机构:
Department of Mathematics, Shawnee State University, Portsmouth, 45662, OHDepartment of Mathematics, Shawnee State University, Portsmouth, 45662, OH
机构:
Shawnee State Univ, Dept Math, Portsmouth, OH 45662 USAShawnee State Univ, Dept Math, Portsmouth, OH 45662 USA
Li, Jinlu
Wen, Ching-Feng
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机构:
Kaohsiung Med Univ, Ctr Fundamental Sci, Kaohsiung 80708, Taiwan
Kaohsiung Med Univ, Res Ctr Nonlinear Anal & Optimizat, Kaohsiung 80708, TaiwanShawnee State Univ, Dept Math, Portsmouth, OH 45662 USA