O tom jak se rodily první přístupy k udržení horkého fúzního plazmatu pomocí silných elektrických a magnetických polí., Through his whole scientific career, carried out mainly at FTI Kharkov in the Soviet Union, O. A. Lavrentev (1926-2011) studied thermonuclear plasma confinement. Initially an electrostatic confinement and later a magnetic electrostatic plasma confinement was proposed by him. However, he did not describe the transition from the first to the second type of confinement, e. g., from the spherical concentric purely electrostatic trap to the magnetic trap formed by spindle cusp fields with its slits plugged by electrostatic fields, which represents the simplest type of an electromagnetic trap. This article offers a hypothesis of how O. A. Lavrentev transformed the earlier concept into the later one., Milan Řípa, Miroslav Šos., and Obsahuje bibliografii