刘琪, 男 , 1992 年 5 月出生, 安徽东至人, 理学博士。 2015 年 7 月本科毕业于安庆师范大学，2022 年 6 月在中山大学获理学博士学位，2022 年 10 月遴选为硕士生导师。 主要感兴趣的研究方向为泛函分析领域中的 Banach 空间几何理论、Banach 空间的向量积理论、分数阶微分方程以及泛函方程的稳定性理论。担任 Rocky Mountain Journal of Mathematics，Filomat， Fractal and Fractional，Mathematics 等国际 SCI 学术期刊审稿人, 担任美国《数学评论》评论员，已在数学学报（中文版），中国科学（数学，中文版），J. Math. Anal. Appl., Optimization., Bull. Malays. Math. Sci. Soc.，Aequat. Math., Chaos, Solitons and Fractals 等国内外学术期刊发表论文十余篇。英雄不问出处，欢迎热爱基础数学的同学报考我的研究生。

近期发表学术论文

[1] Gang Lu, Qi Liu, Yuanfeng Jin, Jun Xie. 3-variable Jensen ρ-functional inequalities and equations, J. Nonlinear Sci. Appl，2016.

[2] Gang Lu, Jun Xie, Yuanfeng Jin and Qi Liu. Functional inequalities in vector Banach space, Journal of computational analysis and applications, 2017.

[3] Yongjin Li, Qi Liu, Qingying Bu. On Cohen weakly nuclear multilinear operators (in Chinese), 中国科学（数学）, 2020.

[4] Anwarud Din, Yongjin Li , Qi Liu. Viral dynamics and control of hepatitis B virus (HBV) using an epidemic model, Alexandria Engineering Journal，2020.

[5] Aliyu AI, Yongjin Li, Qi Liu, Inc M, Baleanu D, Alshomrani AS. Lump-Type and Bell-Shaped Soliton Solutions of the Time-Dependent Coefficient Kadomtsev-Petviashvili Equation, Front. Phys, 2020.

[6] Qi Liu, Muhammad Sarfraz, Yongjin Li. Some aspects of generalized Zbaganu and James constant in Banach spaces, Demonstratio Mathematica，2021.

[7] Qi Liu, Chuanjiang Zhou,Muhammad Sarfraz, Yongjin Li. On New Moduli Related to the Generalization of the Parallelogram Law, Bull. Malays. Math. Sci. Soc，2021.

[8] Shaoyong Zhang, Qi Liu, Yongjin Li. Order Continuity of Positive Tensor Products of Banach Lattices, 数学学报(中文版), 2021.

[9] Qi Liu, Shaomo Zhuang, Yongjin Li. Additive double ρ-functional inequalities in β-homogeneous F-spaces, Journal of mathematical inequalities, 2021.

[10] Muhammad Sarfraz, Fawad Ali, Qi Liu, Yongjin Li. Characterization of a group-norm by maximum functional equation and stability results, ScienceAsia, 2021.

[11] Qi Liu, Yongjin Li. On a New Geometric Constant Related to the Euler-Lagrange Type Identity in Banach Spaces, Mathematics, 2021.

[12] Huayou Xie,  Qi Liu, Yongjin Li. The generalized rectangular constant on isosceles orthogonality, Southeast Asian Bulletin of Mathematics, 2021.

[13] Qi Liu, Linlin Fu, Yongjin Li. On the Stability of Orthogonal Additivity in β-Homogeneous F -Spaces, Journal of Mathematical Research with Applications, 2022.

[14] Dongwen Zhang, Qi Liu, Rassias John, Yongjin Li. The Stability of Functional Equations with a New Direct Method, Mathematics, 2022.

[15] Linlin Fu, Qi Liu*, Yongjin Li. On the stability of orthogonally Jensen additive and quadratic functional equation, J. Math. Anal. Appl, 2023.

[16] Wenlong Sun, Yuanfeng Jin, Zufeng Peng, Qi Liu. Two new self-adaptive algorithms for solving split common fixed point problems with multiple output sets, Optimization, 2023.

[17] Gang Lu,  Wenlong Sun, Yuanfeng Jin, Qi Liu. Ulam Stability of Jensen Functional Inequality on a Class of Noncommutative Groups，Journal of Function Spaces，2023.

[18] Yuankang Fu, Zhijian Yang，Yongjin Li, Qi Liu. On Some Skew Constants in Banach Spaces，Kyungpook Mathematical Journal，2023.

[19] Qi Liu, Aeshah A. Raezah, Anwarud Din. Lévy impact on the transmission of worms in wireless sensor network: Stochastic analysis，Results in physics，2023.

[20] Yin Zhou（指导的硕士研究生）, Qichuan Ni（指导的本科生）, Qi Liu. Geometric constants and orthogonality in Banach spaces，Contributions to Mathematics，2023.

[21] Yiheng Hu, Gang Lu, Yuanfeng Jin,  Qi Liu. Exploration of indispensable Banach-space valued functions，AIMS Mathematics，2023.

[22] Qi Liu, Anwarud Din, Amina Allali. Analysis of a multiply delayed stochastic Ebola model based on probability density function with case study, Eur. Phys. J. Plus, 2023.

[23] Muhammad Sarfraz, Jiang Zhou, Qi Liu,  Yongjin Li. Generalized Vincze’s functional equations on any group in connection with the maximum functional equation, Aequat. Math, 2024.

[24] Qichuan Ni（指导的本科生）, Qi Liu*, Yin Zhou, Qin Qian. The Constants to Measure the Differences Between Isosceles and α-β Orthogonalities, European Journal of Mathematical Analysis, 2024.

[25] Qichuan Ni（指导的本科生）, Qi Liu*, Yin Zhou. Skew generalized von Neumann-Jordan constant in Banach spaces, Hacet. J. Math. Stat, 2024.

[26] Yang Xu, Zhouping Yin, Yuanzhi Wang, Qi Liu and Anwarud Din. Mittag-Leffler projective synchronization of uncertain fractional-order fuzzy complex valued neural networks with distributed and time-varying delays, AIMS Mathematics, 2024.

[27] Jinyu Xia（指导的硕士研究生）, Qi Liu, Yuxin Wang, Wenhui Xu, Yongmo Hu, Yongjin Li. Orthogonality of skew type and characterization of inner product spaces, Arab. J. Math, 2024.

[28] Qi Liu et al. Pathway to Iterative Schemes Via Error Boundaries of Maclaurin’s Rule, Fractal and fractional, 2024.

[29] Ranran Wang（指导的本科生） , Qi Liu, Jinyu Xia, Silvestru Sever Dragomir. Some study of the orthogonalities based on double integrals, Rendiconti del Circolo Matematico di Palermo Series 2, 2024.

[30] Qi Liu, Yin Zhou, Jinyu Xia, Anwarud Din.  Stochastic analysis of a HBV epidemic model with two-dimensional noises, Chaos, Solitons and Fractals, 2025.

[31] Jinyu Xia（指导的硕士研究生）, Qi Liu, Yin Zhou, Zhiyong Rao and John Michael Rassias. Some studies on Euler-Lagrange quartic functional equations in β-normed spaces，Journal of Applied Analysis and Computation, 2025.

[32] 夏金宇, 刘琪，梁琪琳, β-齐次F 空间中平行四边形型方程及其不等式的稳定性，曲阜师范大学学报(自然科学版), 2025.

学术科研　　

非常欢迎同样对数学有浓厚兴趣的学生。大家一起学习数学、研究数学。本人每学期会开讨论班，一般每周一个半天或更多，欢迎有兴趣的同学参加。 讨论班安排：每周五下午17:00--18:30.  地点：数理楼六楼空教室，一般在601教室或者602教室。

讨论班内容：泛函分析、方程稳定性、分数阶微分方程等相关内容。

讨论班读书计划： [1]  Evans, L.C.,  Gariepy, R.F.: Measure Theory and Fine Properties of Functions—Revised Edition.Text 
books in Mathematics. CRC Press, Boca Raton (2015)   [2] V.Ambrosio, Nonlinear fractional Schrödinger equations in R^N” ,Cham, Birkhäuser/Springer, 2021, p. xvii+662.

受美国《数学评论》邀请作为评论员，对世界顶级数学类期刊 Invent. Math. 上发表的“Banach's isometric subspace problem in dimension four”一文进行专题评论。

参与编写英文著作

Yongjin Li, Qi Liu et al. The Geometric Constants in Banach Spaces. Eliva Press.  ISBN： 978-9994986071, 2023.

学术研究课题

参与国家自然科学基金面上项目"拟Banach空间的几何性质和向量积”.