Hello, Euler integral is not difficult in mathematical analysis. Euler integral is two important improper integral with parametric variables. The integral B(p, q) = ∫ upper limit 1, and the lower limit 0xp-1(1-x) q-1dx is called the first kind of Euler integral. The second kind is r gama function, which has recursive formula and is relatively simple. Euler integral has applications in differential equations, probability statistics, engineering technology and so on. I hope I can help you, and I wish you a happy study.