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Browsing Articole by Author "PORT, Sergiu"

Browsing Articole by Author "PORT, Sergiu"

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  • Aplicarea calcului diferențial la probleme de minim și maxim 
    NEAGU, Natalia; PORT, Sergiu (2015)
    The derivative of a function of a variable is a measure of the rate at which the value of the function changes with respect to the change of the variable. It is called the derivative of f with respect to . If and are real ...
  • Aplicațiile liniei elicoidale 
    PORT, Sergiu (2018)
    This article is intended for the application of the helical line to the construction of the circular staircase according to official standards. These constructions can be executed exactly in constructive geometry.
  • Aplicaţiile grupului centro-afin. Multiplicatorul abstract 
    PORT, Sergiu (Universitatea Pedagogică de Stat “Ion Creangă”, 2019)
    In this study are investigated applications of the centro-affine group. Invariants of this group are used for these applications, in particular a multiplier is constructed.
  • Construcția secțiunii axiale a oului de aur 
    PORT, Sergiu (Universitatea Pedagogică de Stat “Ion Creangă”, 2018)
    The golden ratio that governs patterns, is found in the many-worlds, in galaxies, in atoms, and midway in the human. Phi governs all forms of curves, like the ram's horn or DNA helices. Phi governs all forms of straight-lined ...
  • Construcții cu ajutorul instrumentelor neclasice, ce asigură solvabilitatea construcțiilor geometrice 
    PORT, Sergiu; NEAGU, Natalia (2014)
    In math classes there are problems of geometric constructions that require untraditional tools. The present article approaches some geometric constructions that can be solved using the untraditional tools.
  • Divizarea cercului în secţiunea de aur 
    PORT, Sergiu; TRIFAN, Veronica (Universitatea Pedagogică de Stat "Ion Creangă", 2021)
    Regularities of antiquity was established at the basis of the organization of the universe. One of them is the golden section present in all proportions in the living world. The golden number appears in a series of geometric ...
  • Exemple de optimizare geometrică 
    PORT, Sergiu (Universitatea Pedagogică de Stat "Ion Creangă", 2021)
    Optimization problems are solved with the help of the geometric method, in particularly is studied the maximal volume value.
  • Limitele șirurilor 
    PORT, Sergiu; COVALSCHI, Anatolie (2015)
    String is the fundamental concept of mathematical analysis and calculation of the limit of a series, when it exists, requires most cases, knowledge of the properties of a consistent set of formulas and criteria remarkable ...
  • Metode de integrare cu ajutorul formulelor de recurență 
    PORT, Sergiu; COVALSCHI, Anatolie (2014)
    In this article are applied recurrent formulas for definite and indefinite integration. Recurrent formulas have a quite fruit-ful application in case of under integral functions including enough large powers.
  • Modelul matematic al scării liniare 
    PORT, Sergiu; NEAGU, Natalia (Universitatea Pedagogică de Stat “Ion Creangă”, 2017)
    Mathematical models are used in the natural sciences (physics, technique, biology) and engineering disciplines (such as computer science), as well as in the social sciences (economics, psychology, sociology, political ...
  • Secțiunea de aur în muzică 
    PORT, Sergiu; TRIFAN, Veronica (2017)
    The study of the great works of the universal culture, the creation and perfect relations of complementarities or harmony of these was the subject of both artistic and scientific analysis. Thus, one of the most interesting ...
  • Secțiunea de aur în natură 
    TRIFAN, Veronica; PORT, Sergiu (2015)
    This Article play the surprising properties of the golden section in nature. Number PHI (1.618 ...) is called the number (area) of gold, because it defines the harmonic proportions of the human body and biological spiral ...
  • Secţiunea de aur în artă 
    PORT, Sergiu; TRIFAN, Veronica (Universitatea Pedagogică de Stat “Ion Creangă”, 2016)
    This Article play the surprising properties of the golden section in art. Number PHI (1.618 ...) is called the number (area) of gold, because it defines the harmonic proportions of the human body and biological spiral of ...
  • Secţiunea de aur şi Vesica Pisces – enigmele universului 
    PORT, Sergiu; TRIFAN, Veronica (Universitatea Pedagogică de Stat “Ion Creangă”, 2020)
    Phi (Φ) is irrational number, where the decimal part is infinitely long and non-repeating. The article reflects the basic concept of Pisces Vesica and its mathematical derivation, which is closely related to the geometric ...
  • Soluționarea ecuațiilor și sistemelor de ecuații diferențiale cu ajutorul aplicației Maple 
    PORT, Sergiu; NEAGU, Natalia (Universitatea Pedagogică de Stat “Ion Creangă”, 2016)
    In this article we show traditional solving of differential equations and using Maple, because they play an important role in many disciplines including engineering, physics, economics, biology, etc. Maple is the world ...
  • Unghiul de aur 
    PORT, Sergiu; TRIFAN, Veronica (Universitatea Pedagogică de Stat “Ion Creangă”, 2019)
    The most popular mystery in nature is the golden section. Plants too show this magical proportion, in the form of the golden angle. This study talks about the angular formula of the vortex based on sunflower seeds.

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