Stichera of the sunday octoechos among the hymns of the ancient tropologion

As the title implies the article is concerned with the correspondences between the corpus of stichera of the Sunday Octoechos used in the Byzantine rite and resurrectional hymns of the earlier prototype of the Octoechos, i. e. the so-called Ancient Tropologion, which is preserved in Georgian manuscripts (where it is entitled as Iadgari). The exact number of such correspondences, twenty-nine, is established for the first time. Previously, scholars were referring only to nine such correspondences, one of them having been, actually, erroneously established. The article discusses similarities and differences in the modal assignments of the same hymnographical strophes in the Tropologion, on the one hand, and in the Octoechos, on the other, as well as their liturgical functions. It is established that only about a half of these strophes are used in the Octoechos in the same function as they were in the Tropologion: to accompany the fixed vesperal and matutinal psalmody, namely, the Kyrie ekekraxa psalms and the Ainoi psalms...