Hami GÜNDOĞDU is a Dr. Reseacher at the Department of Mathematics, Sakarya University. He completed his PhD in Applied Mathematics at Sakarya University. His interests include applied mathematics, nonlinear PDEs, fractional PDEs, and fixed point theory. Specifically, he is interested in finding different kinds of solutions to both PDEs and fractional ones. In addition, he investigates approximate and numerical solutions for f/PDEs. His research areas also include structure stability, continuous dependence, and blow-up of solutions for PDEs. Moreover, he is currently studying fixed point theorems and their application to ODEs and PDEs. He is interested in the existence and uniqueness of solutions for different types of ODEs and PDEs.