Journal
AIMS MATHEMATICS
Volume 7, Issue 5, Pages 9232-9246Publisher
AMER INST MATHEMATICAL SCIENCES-AIMS
DOI: 10.3934/math.2022511
Keywords
meromorphic functions; small functions; unicity; differences; differential
Categories
Funding
- National Natural Science Foundation of China [12171127]
- Natural Science Foundation of Zhejiang Province [LY21A010012]
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The paragraph discusses the properties and conditions of two transcendental meromorphic functions, as well as their relationship under certain conditions. It extends and improves previous results in the field.
Let f and g be two transcendental meromorphic functions of finite order with a Borel exceptional value infinity, let alpha (not equivalent to 0) be a small function of both f and g, let d, k, n, m and v(j)(j = 1, 2, ..., d) be positive integers, and let c(j)(j = 1, 2, ..., d) be distinct nonzero finite values. If n >= max{2k + m + sigma + 5,sigma + 2d + 3), where sigma = v(1) + v(2) + ... + v(d), and (f(n)(z)(f(m)(z) - 1) Pi(d)(j=1) f(vj)(z + c(j)))((k)) and (g(n)(z)(g(m)(z) - 1) Pi(d)(j=1) g(vj)(z + c(j)))((k)) share alpha CM then f tg, where t(m) = t(n+sigma) = 1. This result extends and improves some restlts due to [0, 14, 15, 9].
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