On numerical ranges of elements of locally $m$-convex algebras.
Giles, J. R. ; Koehler, D. O.
Pacific J. Math., Tome 49 (1973) no. 2, p. 79-91 / Harvested from Project Euclid
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Publié le : 1973-05-14
Classification:  46H05 
@article{1102945269,
     author = {Giles, J. R. and Koehler, D. O.},
     title = {On numerical ranges of elements of locally $m$-convex algebras.},
     journal = {Pacific J. Math.},
     volume = {49},
     number = {2},
     year = {1973},
     pages = { 79-91},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1102945269}
}

Giles, J. R.; Koehler, D. O. On numerical ranges of elements of locally $m$-convex algebras.. Pacific J. Math., Tome 49 (1973) no. 2, pp.  79-91. http://gdmltest.u-ga.fr/item/1102945269/