Displaying similar documents to “On simultaneous extension of infinitely differentiable functions”

The General Differential Operators Generated by a Quasi-Differential Expressions with their Interior Singular Points

El-sayed Ibrahim, Sobhy (1999)

Serdica Mathematical Journal

Similarity:

The general ordinary quasi-differential expression M of n-th order with complex coefficients and its formal adjoint M + are considered over a regoin (a, b) on the real line, −∞ ≤ a < b ≤ ∞, on which the operator may have a finite number of singular points. By considering M over various subintervals on which singularities occur only at the ends, restrictions of the maximal operator generated by M in L2|w (a, b) which are regularly solvable with respect to the minimal operators T0...