Tian, Jing-Feng; Yang, Zhen-Hang New properties of the divided difference of psi and polygamma functions. (English) Zbl 1483.33002 Rev. R. Acad. Cienc. Exactas Fís. Nat., Ser. A Mat., RACSAM 115, No. 3, Paper No. 147, 23 p. (2021). Reviewer: István Mező (Nanjing) MSC: 33B15 26A48 26A51 26D15 PDFBibTeX XMLCite \textit{J.-F. Tian} and \textit{Z.-H. Yang}, Rev. R. Acad. Cienc. Exactas Fís. Nat., Ser. A Mat., RACSAM 115, No. 3, Paper No. 147, 23 p. (2021; Zbl 1483.33002) Full Text: DOI
Qi, Feng Completely monotonic degree of a function involving trigamma and tetragamma functions. (English) Zbl 1484.33005 AIMS Math. 5, No. 4, 3391-3407 (2020). MSC: 33B15 26A12 26A48 26A51 42A85 44A10 44A35 PDFBibTeX XMLCite \textit{F. Qi}, AIMS Math. 5, No. 4, 3391--3407 (2020; Zbl 1484.33005) Full Text: DOI
Qi, Feng; Agarwal, Ravi P. On complete monotonicity for several classes of functions related to ratios of gamma functions. (English) Zbl 1499.33013 J. Inequal. Appl. 2019, Paper No. 36, 42 p. (2019). MSC: 33B15 26A48 26A51 26D10 26D15 33D05 44A10 PDFBibTeX XMLCite \textit{F. Qi} and \textit{R. P. Agarwal}, J. Inequal. Appl. 2019, Paper No. 36, 42 p. (2019; Zbl 1499.33013) Full Text: DOI
Matejíčka, Ladislav Notes on three conjectures involving the digamma and generalized digamma functions. (English) Zbl 1498.33002 J. Inequal. Appl. 2018, Paper No. 342, 12 p. (2018). MSC: 33B15 26A48 26A51 PDFBibTeX XMLCite \textit{L. Matejíčka}, J. Inequal. Appl. 2018, Paper No. 342, 12 p. (2018; Zbl 1498.33002) Full Text: DOI
Qi, Feng; Guo, Bai-Ni Complete monotonicity of divided differences of the di- and tri-gamma functions with applications. (English) Zbl 1339.33007 Georgian Math. J. 23, No. 2, 279-291 (2016). MSC: 33B15 26A48 26A51 PDFBibTeX XMLCite \textit{F. Qi} and \textit{B.-N. Guo}, Georgian Math. J. 23, No. 2, 279--291 (2016; Zbl 1339.33007) Full Text: DOI arXiv
Qi, Feng; Mortici, Cristinel Some inequalities for the trigamma function in terms of the digamma function. (English) Zbl 1410.33009 Appl. Math. Comput. 271, 502-511 (2015). MSC: 33B15 26A48 26D07 PDFBibTeX XMLCite \textit{F. Qi} and \textit{C. Mortici}, Appl. Math. Comput. 271, 502--511 (2015; Zbl 1410.33009) Full Text: DOI arXiv
Qi, Feng; Luo, Qiu-Ming Bounds for the ratio of two gamma functions: from Wendel’s asymptotic relation to Elezović-Giordano-Pečarić’s theorem. (English) Zbl 1294.33004 J. Inequal. Appl. 2013, Paper No. 542, 20 p. (2013). MSC: 33B15 26D15 PDFBibTeX XMLCite \textit{F. Qi} and \textit{Q.-M. Luo}, J. Inequal. Appl. 2013, Paper No. 542, 20 p. (2013; Zbl 1294.33004) Full Text: DOI arXiv
Koumandos, Stamatis; Lamprecht, Martin Complete monotonicity and related properties of some special functions. (English) Zbl 1272.33003 Math. Comput. 82, No. 282, 1097-1120 (2013). Reviewer: József Sándor (Cluj-Napoca) MSC: 33B15 26D20 26D15 PDFBibTeX XMLCite \textit{S. Koumandos} and \textit{M. Lamprecht}, Math. Comput. 82, No. 282, 1097--1120 (2013; Zbl 1272.33003) Full Text: DOI
Luo, Qiu-Ming; Qi, Feng Bounds for the ratio of two gamma functions – from Wendel’s and related inequalities to logarithmically completely monotonic functions. (English) Zbl 1245.33004 Banach J. Math. Anal. 6, No. 2, 132-158 (2012). MSC: 33B15 26A48 26A51 33D05 26D20 44A10 PDFBibTeX XMLCite \textit{Q.-M. Luo} and \textit{F. Qi}, Banach J. Math. Anal. 6, No. 2, 132--158 (2012; Zbl 1245.33004) Full Text: DOI Euclid EMIS