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- Feng Qi

Discipline name
D-index
D-index (Discipline H-index) only includes papers and citation values for an examined
discipline in contrast to General H-index which accounts for publications across all
disciplines.
Citations
Publications
World Ranking
National Ranking

Mathematics
D-index
56
Citations
10,663
569
World Ranking
538
National Ranking
23

- Mathematical analysis
- Algebra
- Real number

His primary areas of investigation include Monotonic function, Gamma function, Discrete mathematics, Pure mathematics and Mathematical analysis. His studies deal with areas such as Function, Class, Exponential function and Combinatorics as well as Monotonic function. The concepts of his Gamma function study are interwoven with issues in Divided differences and Double factorial.

His work on Open problem as part of general Discrete mathematics study is frequently linked to Convexity, bridging the gap between disciplines. His Pure mathematics research is multidisciplinary, incorporating perspectives in Geometric mean, Jensen's inequality and Inequality. His Mathematical analysis research includes themes of Convex function and Subderivative.

- Bounds for the ratio of two gamma functions. (197 citations)
- A complete monotonicity property of the gamma function (162 citations)
- Complete Monotonicities of Functions Involving the Gamma and Digamma Functions (126 citations)

Feng Qi mainly investigates Pure mathematics, Monotonic function, Combinatorics, Mathematical analysis and Function. His Pure mathematics study incorporates themes from Type, Exponential function and Inequality. His work deals with themes such as Gamma function, Logarithm and Discrete mathematics, which intersect with Monotonic function.

His Combinatorics study integrates concerns from other disciplines, such as Upper and lower bounds and Sequence. Mathematical analysis is often connected to Applied mathematics in his work. The Bell polynomials study which covers Stirling numbers of the second kind that intersects with Bernoulli polynomials.

- Pure mathematics (50.23%)
- Monotonic function (42.33%)
- Combinatorics (27.44%)

- Pure mathematics (50.23%)
- Monotonic function (42.33%)
- Combinatorics (27.44%)

Feng Qi mostly deals with Pure mathematics, Monotonic function, Combinatorics, Bell polynomials and Gamma function. His research integrates issues of Conformable matrix, Hadamard transform, Type, Function and Inequality in his study of Pure mathematics. The various areas that Feng Qi examines in his Monotonic function study include Logarithm, Bernstein function and Exponential function.

Feng Qi interconnects Discrete mathematics and Tridiagonal matrix in the investigation of issues within Combinatorics. His Bell polynomials research includes elements of Mathematical analysis, Differential equation, Stirling number, Special values and Inversion. His biological study spans a wide range of topics, including Multinomial distribution, Series and Applied mathematics.

- Some Inequalities of Čebyšev Type for Conformable k-Fractional Integral Operators (29 citations)
- A double inequality for the ratio of two non-zero neighbouring Bernoulli numbers (28 citations)
- A double inequality for the ratio of two non-zero neighbouring Bernoulli numbers (28 citations)

- Mathematical analysis
- Algebra
- Real number

His main research concerns Pure mathematics, Monotonic function, Generating function, Type and Gamma function. His Pure mathematics study combines topics from a wide range of disciplines, such as Function, Conformable matrix and Inequality. His study in Monotonic function is interdisciplinary in nature, drawing from both Discrete mathematics, Logarithm and Multivariate statistics.

His study on Generating function also encompasses disciplines like

- Catalan number that intertwine with fields like Generalization, Integer, Chebyshev polynomials and Triangular matrix,
- Identity which connect with Bell polynomials, Stirling number, Classical orthogonal polynomials, Unit and Fibonacci polynomials,
- Product, which have a strong connection to Cauchy distribution and Integral representation,
- Nonlinear differential equations that connect with fields like Inversion, Order, Stirling numbers of the second kind and Open problem. His Type study combines topics in areas such as Hadamard transform, Convex function and Hermite polynomials. His studies in Combinatorics integrate themes in fields like Differentiable function and Binomial.

This overview was generated by a machine learning system which analysed the scientist’s body of work. If you have any feedback, you can contact us here.

Bounds for the ratio of two gamma functions.

Feng Qi.

Journal of Inequalities and Applications **(2010)**

234 Citations

A complete monotonicity property of the gamma function

Feng Qi;Chao-Ping Chen.

Journal of Mathematical Analysis and Applications **(2004)**

220 Citations

Complete Monotonicities of Functions Involving the Gamma and Digamma Functions

Feng Qi;Bai-Ni Guo.

**(2004)**

159 Citations

Some Integral Inequalities of Hermite-Hadamard Type for Convex Functions with Applications to Means

Bo-Yan Xi;Feng Qi.

Journal of Function Spaces and Applications **(2012)**

158 Citations

Some completely monotonic functions involving the gamma and polygamma functions

Feng Qi;Bai-Ni Guo;Chao-Ping Chen.

Journal of The Australian Mathematical Society **(2006)**

117 Citations

Generalized weighted mean values with two parameters

Feng Qi.

Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences **(1998)**

108 Citations

Refinements, Generalizations, and Applications of Jordan's Inequality and Related Problems

Feng Qi;Da-Wei Niu;Bai-Ni Guo.

Journal of Inequalities and Applications **(2009)**

104 Citations

BOUNDS FOR THE RATIO OF TWO GAMMA FUNCTIONS-FROM WENDEL'S AND RELATED INEQUALITIES TO LOGARITHMICALLY COMPLETELY MONOTONIC FUNCTIONS

Feng Qi;Qiu-Ming Luo.

Banach Journal of Mathematical Analysis **(2012)**

104 Citations

SOME INEQUALITIES CONSTRUCTED BY TCHEBYSHEFF'S INTEGRAL INEQUALITY

Feng Qi;L I-Hong Cui;Sen-Lin Xu;A. Elbert.

Mathematical Inequalities & Applications **(1999)**

103 Citations

Three classes of logarithmically completely monotonic functions involving gamma and psi functions

Feng Qi.

Integral Transforms and Special Functions **(2007)**

103 Citations

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