Isaeva O. B. RussiaSaratov Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences, ul. Zelyonaya, 38, Saratov, 410019, Russia Старший научный сотрудник СФ ИРЭ РАНКандидат физико-математических наук Author's articles APPROXIMATE DESCRIPTION OF THE MANDELBROT SET. THERMODYNAMIC ANALOGY AUTOMODULATION AND CHAOTIC REGIMES OF GENERATION IN A TWO-RESONATOR GYROKLYSTRON WITH DELAYED FEEDBACK