Geodesic
Weak Families of Maps
Canadian mathematical bulletin, Tome 8 (1965) no. 6, pp. 771-781

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

Let Ω be an index set and for each αεΩ let fα:X → Xα be a function where X and Xα are sets. Assume that, for each α, a topology is given for Xα. Then, as is well-known, the functions fα and the topologies determine a topology for X. This is the so-called weak or initial topology, which is generated by . 
Taylor, J. C. Weak Families of Maps. Canadian mathematical bulletin, Tome 8 (1965) no. 6, pp. 771-781. doi: 10.4153/CMB-1965-057-7
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