International Conferences/Schools
01

Deep learning analysis of solitary waves for a nonlinear evolution model via neural network approach
Brij Mohan
VISAM Summer School on Bayesian Modeling, Computation, and Applications,
UEH University, Ho Chi Minh City, Vietnam
July 23 - Aug 01, 2025
The study of nonlinear partial differential equations (PDEs) is becoming increasingly important in the diverse fields of modern science, such as mathematical modeling and physics, plasma physics, nonlinear mechanics, marine sciences, hydrodynamics, atmospheric sciences, and many others. The closed-form solutions play a significant role in understanding the characteristic properties of solitary wave solutions and the dynamical behavior of the significant outcomes for higher-dimensional nonlinear PDEs. Neural network models (NNM) can help to understand the models and their exact solutions in a deep learning environment. Depending on the hidden layer functions, we can construct different solutions of the investigated equation. The symbolic bilinear technique by Mohan et al. provides the soliton solutions with an arbitrary choice of parameters, and in this work we simplified the method with the use of neural networks for the (3+1)-dimensional generalized Kadomtsev-Petviashvili-Boussinesq (gKP-Boussinesq) equation. However, using symbolic system software such as Mathematica or Maple makes it convenient to carry out such computations and dynamical analysis.
02

Center-controlled N-rogue waves to a new generalized nonlinear P-type (3+1)-D evolution equation by a generalized solution of Hirota's N-soliton technique
Brij Mohan
6th International Conference FIAM-2023, DUBAI, UAE
December 21-22, 2023
This conference abstract presents a research study of a novel (3+1)-dimensional nonlinear partial differential equation. This research investigates the complete integrability of this equation through the standard Painlev\'e test. Using a direct generalized formula and symbolic computation techniques, we create rogue waves with adjustable dynamical characteristics controlled by the center parameters. Our investigation produces rogue wave solutions up to third-order through direct computation, considering a range of center-controlled parameter values and selecting appropriate constants within the equation. To facilitate our analysis, we derive a bilinear equation in the auxiliary function $f$, utilize the Cole-Hopf transformation for the dependent variable $u$, and introduce the transformed variable $\zeta$. Applying the direct approach of $N$-soliton solutions in Hirota's direct method to generate rogue waves up to the third order, we employ a generalized formula based on $N$-soliton solutions. Through the powerful symbolic computation tool \textit{Mathematica}, we provide visualizations of the dynamic behavior of rogue waves across diverse center-controlled parameters. Furthermore, our research highlights the prevalence of massive rogue waves within nonlinear phenomena, showcasing their dominance over their smaller counterparts. The investigated equation offers insights into the evolution of long waves characterized by small amplitudes, particularly relevant in plasma physics, wave motion in fluids, and weakly dispersive media. Rogue waves find applications in diverse scientific fields, including oceanography, fluid dynamics, dusty plasma, optical fibers, and nonlinear dynamics, in understanding complex nonlinear systems.
National Conferences/Schools
01

Generalized N-soliton solutions to nonlinear evolution equations using a novel symbolic bilinear technique
Brij Mohan
International Conference on Nonlinear Analysis and Applications (ICNAA 2024)
Rishikesh, India
May 10-12, 2024
This research proposes a new symbolic bilinear technique to construct N-soliton solutions for nonlinear partial differential equations. Depending on the arbitrary parameters, the proposed technique yields solutions for generalized solitons, illustrating Hirota's N-solitons as a case. Using this technique, we show the investigation of the well-known (1+1)-dimensional Korteweg-de Vries and (2+1)-dimensional Kadomtsev-Petviashvili equations. We show the comparative analysis of solutions for both studied equations up to the third order using this technique compared to those in Hirota's bilinear method. Further, we examine the dynamic behavior of the obtained generalized solitons with distinct parameter values. We build the Cole-Hopf transformations for the KdV and KP equations and obtain the bilinear form using Hirota's D-operators in the auxiliary function. We show the relationship between the dependent and arbitrary parameters, which justifies the relation for the phase shift coefficient as in Hirota's method. Selecting the values of arbitrary parameters as 1 in our obtained solutions provides Hirota's solitons solutions. We use Mathematica, a computer algebra system software, to examine how the obtained solutions with different parameter values behave dynamically. Solitons are stable and localized waves that appear in diverse fields of nonlinear sciences, such as oceanography, plasma physics, fluid mechanics, optical fibers, and other sciences.
02

N-soliton bright-dark solutions of a (4+1)-dimensional variable coefficient generalized KP equation in fluid mechanics: Painlevé test and Hirota bilinear method
Brij Mohan
International Conference on Advances in Pure and Applied Mathematics (ICAPAM-24),
Delhi, India
February 08-10, 2024
This conference abstract presents a research study of a recently formed -dimensional variable coefficient generalized Kadomtsev-Petviashvili (vc-gKP) equation in fluid mechanics. It investigates the Painlevé integrability and bright-dark soliton solutions of this vc-gKP equation using the Painlevé test and Hirota bilinear technique, respectively. We get complete integrability with arbitrary choices, fulfilling the condition for compatibility for the resonances in Painlevé analysis. We obtain the dispersion with a phase variable and then form the Cole-Hopf or logarithmic transformation by calculating the constant in the transformation. Using this transformation, we generate the bilinear equation in the auxiliary function and, with the bilinear differential operator, construct Hirota's bilinear form of this equation. We employ Hirota's bilinear technique for N-soliton solutions to obtain up to three-soliton bright-dark solutions and their interactions with appropriate choices of parameters. Using the computer algebra system software Mathematica, we show the dynamical behavior of the generated solutions with several chosen parameter values. Solitons occur in diverse fields of nonlinear sciences, such as oceanography, fluid mechanics, water waves, optical fibers, plasma physics, and other sciences.
03

The Future of Higher Education in India and its Challenges
Brij Mohan
National Education Conclave: India's Future and Higher Education,
Vigyan Bhawan, New Delhi, India
March 23-24, 2023
This article focuses on the future of higher education in India and discusses the challenges. It shows that significant trends such as online teaching and learning, skill-based education, and internationalization play critical roles in India's future of higher education. After that, it points out that improving the quality of education, increasing funding, promoting inclusive education, improving regulation, and investing in technology infrastructure can enhance and uplift higher education. The educational institutions, the government, and other stakeholders need to come together to work on the challenges, such as access to higher education, regulation, and technological infrastructure, and ensure that India's higher education system can meet future demands. It is necessary to ensure that every student in India has access to quality education and the opportunity to succeed.

