The Department of Mathematics was established in 1958 and it became functional under the able guidance of renowned mathematician Prof. R.S. Mishra in October 1958. In September 1963, Prof. R. P. Agarwal succeeded Prof. R.S. Mishra. Statistics as a full-fledged subject was introduced in the year 1970 at under-graduate level and the teaching of Statistics at postgraduate level was started in 1982.As a consequence, the department was renamed as the Department of Mathematics and Statistics. Under the able guidance of Prof. R. P. Agarwal, the department developed into an important school of research in the fields of Theory of Relativity, Differential Geometry, Fluid Dynamics, Special Functions and Summability.
The Department of Mathematics and Statistics covers an area of 1632 square meters in Majithia Bhavan of the University named after Sir Surendra Singh Majithia, who made significant donation to the building through his family trust.
Department of Mathematics and Statistics has made great strides. The department offers researches besides under graduate and post-graduate courses in the subject Mathematics and Statistics.
Department has a rich Departmental Library containing about 10 thousand books and journals.Earlier about sixty National / International research journals were being subscribed in the department. Grant from the National Board of Higher Mathematics (NBHM) has enabled the department to acquire quality books on various modern branches of Mathematics. Some back-volume Journals have been purchased from NBHM grant. However, NBHM library grant has been revived again from 2019. Faculty members, staff,students and researchers are eligible to access e-resources through INFLIBNET.
In the year 1983, at the initiation of Prof. B.G. Verma, a society known as National Academy of Mathematics, India was founded to promote mathematical training and research. A research journal named 'Journal of the National Academy of Mathematics India, was initiated to publish research papers of Mathematics and Statistics. Earlier a departmental body ‘Gorakhpur University Mathematics Association’ has organized several talent contests and lectures by distinguished mathematicians of the country and abroad. The department has by now produced more than 300 Ph.D. scholars and 1 post-doctoral fellow. Also, about 2000 research papers and 100 texts books have been published by the faculty members of the Department of Mathematics and Statistics. Four International and various national conferences has been organized by the department for promoting Mathematical and Statistical theories and application
Government of Uttar Pradesh has declared the status of Center of Excellence in 2019 to the Department. Dr. Archana Singh Bhadauria and Dr. Rajesh Kumar have received Start-up grants from UGC.
At present, department is actively involved in research area of Functional Analysis, Differential Manifolds, Operations Research, Bio-Mathematics, Mathematical Modelling, Wavelet Analysis, Fixed Point Theory, Fourier Analysis and Approximation Theory, Statistical Inference, Bayesian Inference and Life Testing, Reliability Theory, Demography, Bio-Statistics and Computational Statistics.
Now-a-days the department is well equipped with six LCD Projectors which are being used by faculty members while teaching in the classrooms.