[en] The thesis in question has focused on the sociolinguistic situation of the city of Kiev (Ukraine) and, specifically, on its organization in terms of functional distribution of Russian-Ukrainian bilingualism. Kiev, chosen as the central target of the study, has been considered as a linguistic community characterized by a historical unbalanced bilingualism, in which the modern national language policy could have created, since 1991, favorable conditions for the language space reorganization. As the chief aims of this macrosynchronic correlational research we have proposed the definition of the leading social, stylistic and extralinguistic factors and social groups which favor the stratified usages of the languages in contact. Moreover, we have intended to verify whether a hypothetical generational variation is being occurred in the language practices of the speakers, as well as in their attitudes towards the languages functionality and symbolic value as a consequence of the sociopolitical change induced by the independence of Ukraine in 1991. In view of these goals, a field work based on a representative sample has been carried out. By means of this, we have compared: (1.?) two age non-ontogenic groups, which represent a generational group born and educated during the soviet period, and a generational group born and educated during the independence period; (2.?) men and women, and (3.?) resident groups from different urban districts, which constitute diverse socioeconomic strata. Thanks to the analysis proper, as well as to the results of the work, we have described the multidimensional sociolinguistic structure of the Ukrainian capital in terms of: the social variables output in the sociolinguistic variation; the dyaphasic, extralinguistic and social dependence of the code choices, and the different social characteristics speakers attitudes towards the functionality and value of the languages in contact.

[es] La atenci?n de esta tesis doctoral se ha centrado en la situaci?n socioling??stica de la ciudad de Kiev (Ucrania) y, particularmente, en su organizaci?n en t?rminos de la distribuci?n funcional del biling?ismo ruso-ucraniano. En calidad de objeto central del estudio, Kiev ha sido considerado como una comunidad ling??stica con un biling?ismo hist?rico desequilibrado, donde la introducci?n de la pol?tica ling??stica nacional desde el 1991 pod?a crear condiciones favorables para la reestructuraci?n del espacio idiom?tico. Los principales objetivos de esta investigaci?n macrosincr?nica correlacional han radicado en la definici?n de los principales factores sociales, estil?sticos y extraling??sticos, as? como en la delimitaci?n de los grupos sociales que favorecen el uso estratificado de ambas lenguas en contacto. En particular, se ha buscado constatar el hipot?tico cambio generacional en el uso del ucraniano y del ruso, y en las actitudes hacia su funcionalidad y valor simb?lico, como un hecho socioling??stico inducido por los cambios sociopol?ticos ocurridos con la independencia de Ucrania en el 1991. Para ello, se ha realizado un trabajo de campo con la recogida de una muestra representativa, mediante que se han contrastado: (1.?) dos grupos de edad no ontog?nicos que representan un grupo generacional nacido e instruido en la ?poca sovi?tica y un grupo generacional nacido e instruido en la ?poca independiente; (2.?) hombres y mujeres, y (3.?) residentes de diferentes barrios de Kiev, que componen diferentes grupos socioecon?micos. Los an?lisis y resultados del trabajo describen la estructuraci?n socioling??stica multidimensional de la capital ucraniana en t?rminos del rendimiento de las variables sociales en la variaci?n socioling??stica; de la dependencia diaf?sica, extraling??stica y social de la selecci?n de c?digo; y de las actitudes de los hablantes de diferentes retratos sociales hacia la funcionalidad y valor de las lenguas en contacto.