Geodesic
Semigroups in the simply connected covering of SL(2).
Semigroup forum, Tome 46 (1993) no. 1, pp. 379-387.

Voir la notice de l'article provenant de la source European Digital Mathematics Library

Mots-clés : reachable sets, controllability, left-invariant Lorentzian metric, geodesics, simply connected covering group, , Lie semigroups, one-parameter semigroups, Lie algebra, Lorentzian cones, adjoint action, Pontrjagin Maximum Principle, smooth causal loops, exponential function 
@article{SF_1993__46_1_135244,
     author = {D. Mittenhuber},
     title = {Semigroups in the simply connected  covering of {SL(2).}},
     journal = {Semigroup forum},
     pages = {379--387},
     publisher = {mathdoc},
     volume = {46},
     number = {1},
     year = {1993},
     zbl = {0776.22001},
     url = {http://geodesic.mathdoc.fr/item/SF_1993__46_1_135244/}
}
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D. Mittenhuber. Semigroups in the simply connected  covering of SL(2).. Semigroup forum, Tome 46 (1993) no. 1, pp. 379-387. http://geodesic.mathdoc.fr/item/SF_1993__46_1_135244/