We obtain simple estimates for the essential norm of a composition
operator acting from the Hardy space Hp to Hq, p > q, in one or several
variables. When p = ∞ and q = 2 our results give an exact formula for the
essential norm.
机构:
Hong Kong Polytech Univ, Div Sci, Engn & Hlth Studies Coll Profess & Continuing Edu, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Div Sci, Engn & Hlth Studies Coll Profess & Continuing Edu, Hong Kong, Peoples R China
机构:
Nanyang Technol Univ, Sch Phys & Math Sci, Div Math Sci, Singapore 637371, SingaporeNanyang Technol Univ, Sch Phys & Math Sci, Div Math Sci, Singapore 637371, Singapore
Hu Bingyang
Khoi, Le Hai
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Nanyang Technol Univ, Sch Phys & Math Sci, Div Math Sci, Singapore 637371, SingaporeNanyang Technol Univ, Sch Phys & Math Sci, Div Math Sci, Singapore 637371, Singapore
Khoi, Le Hai
Le, Trieu
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机构:
Univ Toledo, Dept Math & Stat, Mail Stop 942, Toledo, OH 43606 USANanyang Technol Univ, Sch Phys & Math Sci, Div Math Sci, Singapore 637371, Singapore