Arins then continued his postgraduate studies at Moscow State University where his doctorate was supervised by L V Keldysh. Ludmila Vsevolodovna Keldysh was a professor at Moscow State University and an outstanding mathematician who made important contributions to set theory and geometric topology .
Arins pagkatapos ay patuloy sa kanyang postgradweyt pag-aaral sa Moscow State University na kung saan ang kanyang titulo ng doktor ay supervised by LV Keldysh. Ludmila Vsevolodovna Keldysh ay isang propesor sa Moscow State University at isang natitirang dalubbilang na ginawa ng mahalagang kontribusyon upang magtakda ng teorya at geometriko topology.