Аннотация:There are many applications of mathematical physics in several fields of basic science andengineering. Thus, we have tried to provide the Special Issue “Modern Problems of MathematicalPhysics and Their Applications” to cover the new advances of mathematical physics and itsapplications. In this Special Issue, we have focused on some important and challenging topics, such asintegral equations, ill-posed problems, ordinary differential equations, partial differential equations,system of equations, fractional problems, linear and nonlinear problems, fuzzy problems, numericalmethods, analytical methods, semi-analytical methods, convergence analysis, error analysis andmathematical models. In response to our invitation, we received 31 papers from more than 17countries (Russia, Uzbekistan, China, USA, Kuwait, Bosnia and Herzegovina, Thailand, Pakistan,Turkey, Nigeria, Jordan, Romania, India, Iran, Argentina, Israel, Canada, etc.), of which 19 werepublished and 12 rejected.