Geodesic
On reduced direct products
Algebra i logika, Tome 6 (1967) no. 3, pp. 77-89 
A. I. Omarov. On reduced direct products. Algebra i logika, Tome 6 (1967) no. 3, pp. 77-89. http://geodesic.mathdoc.fr/item/AL_1967_6_3_a8/
@article{AL_1967_6_3_a8,
     author = {A. I. Omarov},
     title = {On reduced direct products},
     journal = {Algebra i logika},
     pages = {77--89},
     year = {1967},
     volume = {6},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1967_6_3_a8/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

This paper gives some applications of reduced products to the theory of models. There are: simple proof of generalization of theorem Ehrenfeucht–Mostowski [6], simple proof of generalization of theorem of Vaught [7], some new results of definability in this paper.