The article presents the analysis of the rules of punctuation concentrated on the use of a comma in Spanish language. Nevertheless, in the introduction the author cite several exemples to show the differences and similarities between the use of a comma in Spanish, Polish, Russian, Czech, French, English and German languages in order to emphasize the conventional nature of the comma. The main part of the work presents the use of a comma in Spanish in five syntactic contexts. The article ends with conclusions that reveal the obligatory, distinctive and optional nature of the comma in the Spanish orthography.
This paper presents a set of concepts aiming at the reconstruction of mechanisms of the development of economic space. These concepts are ordered in the way that consecutive concepts add new pieces of knowledge increasing the degree of cognition of the mechanisms of economic space. This set includes among others: shift from one steady-state to the next steady-states, selforganization and the development out of equilibrium, multiple equilibrium, punctuated equilibrium, innovation in the phase transition, pulsative course of development process, emergence of complex spatial systems, development code of the system of regions.