A lower bound for the gap between the first two eigenvalues of Schrödinger operators on convex domains in $S^n$ or ${\bf R}^n$.
Ling, Jun
Michigan Math. J., Tome 40 (1993) no. 1, p. 259-270 / Harvested from Project Euclid
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Publié le : 1993-05-14
Classification:  35P15,  35J10,  47F05,  81Q10 
@article{1029004752,
     author = {Ling, Jun},
     title = {A lower bound for the gap between the first two eigenvalues of Schr\"odinger operators on convex domains in $S^n$ or ${\bf R}^n$.},
     journal = {Michigan Math. J.},
     volume = {40},
     number = {1},
     year = {1993},
     pages = { 259-270},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1029004752}
}

Ling, Jun. A lower bound for the gap between the first two eigenvalues of Schrödinger operators on convex domains in $S^n$ or ${\bf R}^n$.. Michigan Math. J., Tome 40 (1993) no. 1, pp.  259-270. http://gdmltest.u-ga.fr/item/1029004752/