Letters to the Editor

Letter to the editors: “The index of the Bitsadze–Samarskiǐ problem for harmonic functions” [Differentsial'nye Uravneniya 24 (1988), no. 1, 105–110; MR0930160]

K. Yu. Kishkis

 English version: Differential Equations, 1989, 25:3, 366

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