Geodesic
Approximation and convex decomposition by extremals in a C*-algebra.
Mathematica Scandinavica, Tome 81 (1998) no. 2, pp. 69-85.

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Mots-clés : unital -algebra, extreme points of the unit ball, quasi-invertible elements, spectral theory, functional calculus, regular approximation, unitary decomposition, -function 
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     author = {Gert K. Pedersen and Lawrence G. Brown},
     title = {Approximation and convex decomposition by extremals in a {C*-algebra.}},
     journal = {Mathematica Scandinavica},
     pages = {69--85},
     publisher = {mathdoc},
     volume = {81},
     number = {2},
     year = {1998},
     zbl = {0898.46051},
     url = {http://geodesic.mathdoc.fr/item/MS2_1998__81_2_167428/}
}
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Gert K. Pedersen; Lawrence G. Brown. Approximation and convex decomposition by extremals in a C*-algebra.. Mathematica Scandinavica, Tome 81 (1998) no. 2, pp. 69-85. http://geodesic.mathdoc.fr/item/MS2_1998__81_2_167428/