Geodesic
Semibounded Extensions of Singular Ordinary Differential Operators
Canadian mathematical bulletin, Tome 31 (1988) no. 4, pp. 432-438

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The self-adjoint extensions of the singular differential operator Ly = [(py’)’ + qy]/w, where p < 0, w > 0, q ≧ mw, are characterized under limit-circle conditions. It is shown that as long as the coefficients of certain boundary conditions define points which lie between two lines, the extension they help define has the same lower bound.
DOI : 10.4153/CMB-1988-063-x
Mots-clés : 34B20, 34B25 
Krall, Allan M. Semibounded Extensions of Singular Ordinary Differential Operators. Canadian mathematical bulletin, Tome 31 (1988) no. 4, pp. 432-438. doi: 10.4153/CMB-1988-063-x
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     title = {Semibounded {Extensions} of {Singular} {Ordinary} {Differential} {Operators}},
     journal = {Canadian mathematical bulletin},
     pages = {432--438},
     year = {1988},
     volume = {31},
     number = {4},
     doi = {10.4153/CMB-1988-063-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1988-063-x/}
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