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INDEX OF ELLIPTIC OPERATORS ASSOCIATED WITH DISCRETE GROUPS AND FIXED POINTS СтатьяAbbas H.H., Savin A.Yu.Mathematical Notes. Том 116. 2024. С. 139-167
ON THE TOPOLOGICAL INDEX OF ELLIPTIC OPERATORS ON TWO-DIMENSIONAL MANIFOLDS WITH CYLINDRICAL ENDS СтатьяAbbas H.H., Zhuikov K.N., Savin A.Yu.Mathematical Notes. Том 116. 2024. С. 1159-1169
ON THE INDEX PROBLEM ON MANIFOLDS WITH GROUP ACTIONS. CONTRIBUTIONS OF FIXED POINTS СтатьяAbbas H.H., Savin A.Y.Нелокальные и нелинейные задачи. 2024. 5 с.
LOCALIZED CHERN CHARACTER AND THE INDEX OF ELLIPTIC OPERATORS ASSOCIATED WITH DISCRETE GROUPS СтатьяAbbas H.H., Savin A.Yu.Russian Journal of Mathematical Physics. Том 31. 2024. С. 785-790