Facultatea de Matematică şi Informatică / Faculty of Methematics and Informatics
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Item UNELE ASPECTE ALE TEORIEI GENERALE A GRUPURILOR DISCRETE PSEUDOMINORE DE Wq -SIMETRIE(CEP USM, 2010) Lungu, Alexandru; Braniște, MarinaIn the present paper there are formulated and analyzed the necessary and sufficient conditions to describe the concrete structure every pseudo-minor group of Wq -symmetry, inferred from generating group G and initial defining group of permutation P .Item STRUCTURA GENERALĂ A GRUPURILOR DISCRETE PSEUDOMINORE DE Wq -SIMETRIE(CEP USM, 2010) Braniște, Marina; Lungu, AlexandruIn the present paper there are studied some properties of pseudo-minor groups of Wq -symmetry, are analyzed the necessary and sufficient conditions for a certain group of a generalized symmetry in order to be pseudo-minor, are described in general its subgroups.Item ASUPRA PROPRIETĂŢILOR GRUPURILOR PSEUDOMINORE DE -SIMETRIE(CEP USM, 2010) Braniște, Marina; Lungu, AlexandruIn the present paper there are studied, analyzed and described some properties of pseudo-minor groups of -symmetry: the general structure, the necessary and sufficient conditions for a certain group of a generalized symmetry in order to be pseudo-minor, one method of deriving.Item ASUPRA INTERPRETĂRII GEOMETRICE A GRUPURILOR MINORE DE P -SIMETRIE CU FIGURI „INDEXATE”(CEP USM, 2008) Braniște, Marina; Lungu, AlexandruIn the present paper is studied the problem of geometrical interpretation of junior, semijunior and pseudojunior groups of P -symmetry with „indexed” geometrical figures. Are determined the conditions in which one junior, semijunior and pseudojunior group of P -symmetry has or not geometrical interpretation. Is explained the methodology of construction of „indexed” geometrical figure, which interprets group gave. Are also constructed respectively „indexed”figures and analysed results.Item STRUCTURA AUTOMORFISMELOR GRUPURILOR CRISTALOGRAFICE DE CATEGORIA G30(CEP USM, 2007) Lungu, Alexandru; Braniște, MarinaIn the present paper there are studied and described the concrete structure of the automorphisms of 3-dimensional crystallographic point groups.