The science of "Uttaratantra" in Mahayana Buddhism

In the article the concept of tathagatagarbha - one of the basic doctrines of mahayana Buddhism, as it is submitted in the "Tathagatagarbha-sutra" and in the commentary tradition of the Tibetan Buddhism is considered, the place of the sutras, revealing this doctrine, in structure of the initial literature of the Buddhism is determined, and various approaches to treatment of this concept in the Tibetan philosophy are opened.