On the location of the spectrum of the Tricomi problem for the Lavrentiev-Bitsadze equation with a complex parameter

This article studies the uniqueness of the solution of the Tricomi problem for the Lavrentiev-Bitsadze equation with a spectral complex parameter with two lines of type change. A mixed-type equation with two lines of type change was considered, where , , are complex parameters; cases on the complex plane (the domain is the interior of the right branch of the hyperbola; the domain is a circle; the domain is the interior of a parabola) in which the solution of the problem is unique were considered.