[institut] Seminar za teoriju relativnosti i kosmološke probleme - plan rada za april 2022.

[Tatjana Jaksic Kruger]

Поштоване колегинице и колеге,

са задовoљством вас обавештавамо о априлским предавањима Семинара за 
теорију релативности и космолошке моделе.

Поједина предавања ће се одржати у соби 301ф Математичког института, III 
спрат, у 11 часова, а преносиће се и на даљину путем линка
https://miteam.mi.sanu.ac.rs/asset/yujMwF3JyYqzw6Jth/?group=yujMwF3JyYqzw6Jth.

Најаве априлских предавања можете пратити на страници
http://www.mi.sanu.ac.rs/novi_sajt/seminars/programs/seminar19.apr2022.php.

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Среда, 6. април, 11:00

Др Милош Арсенијевић, Филозофски факултет Универзитета у Београду

      НЕКОЛИКО ЗАГОНЕТНИХ ПИТАЊА О ВРЕМЕНУ

Апстракт.  Уместо директног одговора на питање ШТА ЈЕ ВРЕМЕ? биће 
анализирана различита питања која су, од старе Грчке до данас, с њим у 
вези разматрана у филозофији, физици и математици, а која се тичу његовог 
онтолошког статуса, структуре, топологије, метрике, тока, смера, 
индетерминизма и односа према унутарсветској бесконачности.

* * *

Среда, 13. април, 11:00

Др Катица Хедрих, Математички институт Српске академије наука и уметности

      MATRICES OF METRIC TENSIONS OF THE TANGENT SPACE:
      Once again on matrices of metric tensons of the tangent space of a
      kinetic point position vector in various orthogonal curvilinear
      systems and their changes with time

Апстракт. The content of the lecture is based on the results of lecturer, 
published in 2021 in a review paper in the journal [1] The European 
Physical Journal Special Topics, as well as on new unpublished results 
achieved in the pandemic 2021.
In the first part of the lecture, the lecturer points out the 
contributions, two heads of the Department of Mechanics of MI SASA, to 
academician Tatomir P. Andjeliċ (1903-1993) and Professor Danilo P. 
Raškoviċ (1910-19085) in the inclusion and promotion of tensors and tensor 
calculus in university teaching at the faculties of natural-mathematical 
sciences and faculties of  mechanical engineering sciences un area of 
mathematics and mechanics in Yugoslavia, as well as the education of 
numerous generations of the students of mechanics and mathematics in that 
field. This part is based on two biobibiographies of these scientists, 
written and published by this lecturer in the SASA Edition "Life and work 
of Serbian scientists". The cooperation of Serbian scientists with the 
Japanese society Tensor, as well as the recently pass a way academician 
Radu Miron (1927-2922) from Romania, will be briefly pointed out.
The next part of the lecture talks about the base vectors of the tangent 
space of the kinetic point position vector in different orthogonal 
curvilinear coordinate systems, as well as the angular velocities and 
extensions of the base vectors of the kinetic point tangent space during 
its movement.
The lecturer will then present the matrices of metric tensors in different 
orthogonal curvilinear coordinate systems, as well as the matrices of the 
first derivatives of these metric tensors.
The lecturer designed and constructed an orthogonal coordinate system of 
curvilinear coordinates for rotating surfaces for the purpose of studying 
rolling, without sliding, of a heavy, homogeneous and isotropic ball on 
rotating coordinate surfaces of different shapes.
In addition in the lecture, the last part will present nonlinear 
differential equations of rolling, non-slip, heavy homogeneous and 
isotropic balls on rotating, mutually both sides  retaining, coordinate 
surfaces (sphere, cone, torus, general case of rotating surface). The 
existence of a cyclic integral and a cyclic coordinate in all these cases 
is pointed out.
He also formulated a number of theorems based on scientific results, which 
are the content of this lecture
-	The lecture is dedicated to the memory of two heads of the 
Department of Mechanics of MI SASA, academician Tatomir P. Andjeliċ 
(1903-1993) and Professor Danilo P. Raškoviċ (1910-19085)

* * *

Среда, 20. април, 11:00

Др Ненад Швракић, Институт за физику у Београду

НАСЛОВ и Апстракт ће бити накнадно најављени

__________________________


Регистрациони линк: https://miteam.mi.sanu.ac.rs/asset/CyzPn2zriMsWWNzii 
Учествовање путем регистрационог линка вам омогућује да будете активан учесник, 
да постављате питања, пратите коментаре на чету и преузимате фајлове.

Предавање је могуће пратите као анонимни учесник путем линка:
https://miteam.mi.sanu.ac.rs/asset/yujMwF3JyYqzw6Jth/?group=yujMwF3JyYqzw6Jth

Главна страница Семинара
http://www.mi.sanu.ac.rs/novi_sajt/research/seminars/relativity_cosmological.php.

Руководилац Семинара за теорију релативности и космолошке моделе
проф. др Жарко Мијајловић

Секретар Семинара за теорију релативности и космолошке моделе
др Татјана Јакшић Кругер
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