Geodesic
The Steiner Point of a Convex Polytope
Canadian journal of mathematics, Tome 18 (1966) no. 1, pp. 1294-1300

Voir la notice de l'article provenant de la source Cambridge University Press

Associated with each bounded convex set K in n-dimensional euclidean space En is a point s(K) known as its Steiner point. First considered by Steiner in 1840 (6, p. 99) in connection with an extremal problem for convex regions, this point has been found useful in some recent investigations (for example, 4) because of the linearity property 1 Addition on the left is vector addition of convex sets. 
Shephard, G. C. The Steiner Point of a Convex Polytope. Canadian journal of mathematics, Tome 18 (1966) no. 1, pp. 1294-1300. doi: 10.4153/CJM-1966-128-4
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