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Separation and comparison theorems for classes of singular elliptic inequalities and degenerate elliptic inequalities. (English) Zbl 0213.37703

MSC:
35B05 Oscillation, zeros of solutions, mean value theorems, etc. in context of PDEs
35R45 Partial differential inequalities and systems of partial differential inequalities
35J99 Elliptic equations and elliptic systems
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[2] DOI: 10.1090/S0002-9939-1965-0180753-X
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