Batir, Necdet2025-05-102025-05-1020080723-086910.1016/j.exmath.2007.10.0012-s2.0-41449084811https://doi.org/10.1016/j.exmath.2007.10.001https://hdl.handle.net/20.500.14720/11870Batir, Necdet/0000-0003-0125-497XIn this paper we prove a complete monotonicity theorem and establish some upper and lower bounds for the gamma function in terms of digamma and polygamma functions. (C) 2007 Elsevier GmbH. All rights reserved.eninfo:eu-repo/semantics/openAccessGamma FunctionDigamma FunctionPolygamma FunctionsComplete MonotonicityRiemann Zeta-FunctionArticle