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Publikováno v:
Applicable Analysis. 101:3689-3696
Let L=∑i,jaij∂xi∂xj+∑ibi∂xi+c be an elliptic operator with smooth enough coefficients, u a solution to the equation Lu = 0 in Ω⊂Rn, ω⊂Ω an open set. As is well known, if u|ω=0 then u = 0 everywhere...