OICC Press Mathematical Sciences 2251-7456 15 4 (December 2021) 2021 03 17 On establishing qualitative theory to nonlinear boundary value problem of fractional differential equations 10.1007/s40096-021-00384-7 EN Amjad Ali Department of Mathematics, Govt P.G Jahanzeb College, Saidu Sharif, Swat, Khyber Pakhtunkhwa, PK Nabeela Khan Department of Mathematics, Govt P.G Jahanzeb College, Saidu Sharif, Swat, Khyber Pakhtunkhwa, PK Seema Israr Department of Mathematics, Govt P.G Jahanzeb College, Saidu Sharif, Swat, Khyber Pakhtunkhwa, PK Journal Article 2021 03 17 Abstract In this article, we study a class of nonlinear fractional differential equation for the existence and uniqueness of a positive solution and the Hyers–Ulam-type stability. To proceed this work, we utilize the tools of fixed point theory and nonlinear analysis to investigate the concern theory. We convert fractional differential equation into an integral alternative form with the help of the Greens function. Using the desired function, we studied the existence of a positive solution and uniqueness for proposed class of fractional differential equation. In next section of this work, the author presents stability analysis for considered problem and developed the conditions for Ulam’s type stabilities. Furthermore, we also provided two examples to illustrate our main work.