Geodesic
Criterion for uniform invertibility of families of strong approximations to one-dimensional singular integral operators with continuous coefficients
Matematičeskie zametki, Tome 62 (1997) no. 3, pp. 430-439 
V. S. Pilidi. Criterion for uniform invertibility of families of strong approximations to one-dimensional singular integral operators with continuous coefficients. Matematičeskie zametki, Tome 62 (1997) no. 3, pp. 430-439. http://geodesic.mathdoc.fr/item/MZM_1997_62_3_a11/
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     author = {V. S. Pilidi},
     title = {Criterion for uniform invertibility of families of strong approximations to one-dimensional singular integral operators with continuous coefficients},
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     year = {1997},
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     url = {http://geodesic.mathdoc.fr/item/MZM_1997_62_3_a11/}
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Voir la notice de l'article provenant de la source Math-Net.Ru

A criterion is obtained for the applicability of the approximation method based on strongly approximating operator families converging to a one-dimensional singular integral operator with coefficients continuous in the circle. Some special cases are considered.

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[4] Pilidi V. S., “Kriterii ravnomernoi obratimosti regulyarnykh approksimatsii odnomernykh singulyarnykh integralnykh operatorov s kusochno-nepreryvnymi koeffitsientami”, Izv. AN SSSR. Ser. matem., 54:6 (1990), 1270–1294

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