Geodesic
Extension of Positive Definite Functions on Lie Groups
Journal of Lie Theory, Volume 1 (1991) no. 2, pp. 225-234

See the original article notice from the Heldermann Verlag source

Zbl
Classification: 43A35, 42A82
Keywords: positive definite functions, Lie groups, Krein's problem, extendability, infinitesimal representation, Lie algebra, derivation, Heisenberg group 
J. Friedrich. Extension of Positive Definite Functions on Lie Groups. Journal of Lie Theory, Volume 1 (1991) no. 2, pp. 225-234. http://geodesic.mathdoc.fr/item/JOLT_1991_1_2_a11/
@article{JOLT_1991_1_2_a11,
     author = {J. Friedrich},
     title = { Extension of {Positive} {Definite} {Functions} on {Lie} {Groups}},
     journal = {Journal of Lie Theory},
     pages = {225--234},
     year = {1991},
     volume = {1},
     number = {2},
     zbl = {0762.43004},
     url = {http://geodesic.mathdoc.fr/item/JOLT_1991_1_2_a11/}
}
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