Geodesic
On roots of the multiple integration operator in the space of functions analytic in a~disk
Izvestiya. Mathematics , Tome 13 (1979) no. 3, pp. 685-693.

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Let $A_R$ denote the space of all single-valued functions analytic in the disk $|z|$, $0$, with the topology of compact convergence, and let $J$, $J\cdot=\int_0^z\cdot\,d\xi$, be the integration operator on it. In the paper all continuous linear operators on $A_R$ which satisfy the condition $Y^p=J^p$, where $p$ is a fixed natural number, are found, and it is shown that for each of them there exists a one-to-one bicontinuous mapping $T$ of the space $A_R$ to itself which commutes with $J^p$ and satisfies $YT=TJ$. Bibliography: 8 titles. 
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N. I. Nagnibida. On roots of the multiple integration operator in the space of functions analytic in a~disk. Izvestiya. Mathematics , Tome 13 (1979) no. 3, pp. 685-693. http://geodesic.mathdoc.fr/item/IM2_1979_13_3_a7/

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[8] Nagnibida N. I., “K voprosu o privedenii operatorov Volterra v analiticheskikh prostranstvakh k prosteishemu vidu”, Matem. zametki, 17:4 (1975), 625–630 | MR | Zbl