Geodesic
The Valence of Sums and Products
Canadian journal of mathematics, Tome 20 (1968) no. 1, pp. 1173-1177

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

A function ƒ(z) is said to be p-valent in a region if it is regular in if the equation 1 has p distinct roots in for some particular w0 , and if for each complex w0 , equation (1) does not have more than p roots in . The function ƒ(z) is also said to have valence p in . In the case when p = 1, the function is said to be univalent in . 
Goodman, A. W. The Valence of Sums and Products. Canadian journal of mathematics, Tome 20 (1968) no. 1, pp. 1173-1177. doi: 10.4153/CJM-1968-111-0
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