Vladyslav Elijovych Lyantse (in honour of the 100th anniversary of birth)

Some pages of biography and main scientific achievements of professor Wladyslaw Elijowich Lyantse, a famous mathematician, are presented.

Scientometrics view on scientific contacts of academician N.N. Yanenko

В данной статье, посвященной столетию со дня рождения выдающегося советского математика и механика, академика АН СССР, Героя Социалистического Труда Николая Николаевича Яненко, представлен подробный анализ его научной генеалогии с использованием проекта “Математическая генеалогия”. Показано, что в научной генеалогии академика Н.Н. Яненко оказались перечислены имена наиболее выдающихся отечественных математиков XIX в., подавляющего большинства крупнейших математиков континентальной Европы XVII - второй половины XIX вв., а также выдающихся астрономов, физиков, медиков, философов, богословов православия, католицизма, англиканства и лютеранства. Кроме того, проанализировано научное сотрудничество Н.Н. Яненко, зафиксированное в Collaboration Distance Project. Установлено, что расстояние соавторства академика Н.Н. Яненко до наиболее известных математиков и физиков ХХ-XXI вв. составляет 3-5. The present work is devoted to the 100th anniversary of the distinguished Soviet specialist in mathematics and mechanics, academician of the Academy of Sciences of the USSR, Hero of Socialist Labor Nikolai Nikolaevich Yanenko. A detailed analysis of N.N. Yanenko scientific genealogy using the “Mathematical genealogy” project is given. It is demonstrated that the scientific genealogy of N.N. Yanenko contains the name of the most prominent national mathematician of the 19th century, the majority of leading mathematician of the continental Europe of the 16th - 2nd half of the 19th centuries, as well as prominent astronomers, physicists, physicians, philosophers, theologians of the Eastern Orthodox Church, Catholicism, Anglicanism, Lutheranism. The scientific cooperation of N.N. Yanenko is analyzed using the Collaboration Distance Project. The co-authorship distance from N.N. Yanenko to the most famous mathematician and physicists of the 20th-21th centuries is computed to be equal to 3-5.

Famous mathematician, outstanding person of XXI century

Famous mathematician, outstanding person of XXI century.

To the 75th anniversary of Academician of the NAS of Ukraine A. A. Borisenko

May 24, 2021 turned 75 years since the birth of the famous mathematician, academician of the National Academy of Sciences of Ukraine Oleksandr Andriyovych Borisenko. The editorial board welcomes. According to the interviews of O.A. Borisenko: ''Half a century in geometry. To the 75th anniversary of corresponding member of NAS of Ukraine O.A. Borisenko. (2021). Bulletin of the National Academy of Sciences of Ukraine, (5), 95–102.''

«Dvudyuzhii (Sturdy) Shafarevich»

he article is devoted to the biography and views of the famous mathematician and dissident-Russophile I.R. Shafarevich. Since the early 1970s he was an associate of A.I. Solzhenitsyn. In the article the author analyzes the main events of Shafarevich's life and socio-political activity, as well as the ideas of his main works.

THÉORIE DES COMÈTES ET OBSERVATIONS INÉDITES EN OCCIDENT MUSULMAN

In this paper, we present the Aristotelian theory of comets, which is well known in the Muslim West through the commentaries of Ibn Rušd and Ibn Bāǧǧa. This aspect is covered three centuries later in an unknown manuscript attributed to the famous mathematician Ibn Ġāzī al-Miknāsī (1437-1513), and this text is not present in the known list of his works. The author devotes a part of his manuscript to the comet astrology following Ptolemy, and introduces a critical position of Iḫwān al-Ṣafā’, characterized by the rejection of the sidereal comets idea. We are also interested in comet classifications given by Ibn Ġāzī and another author ‘Alī al-Antākī. We found that the content of the De cometis of pseudo-Ptolemy is analogous with the text of Ibn Ġāzī, and almost identical to the text of al-Antākī. Then, we are interested in observations of comets from the 9th to the end of the 19th century in North Africa and in Islamic Spain (Andalusia), recorded in some Arabic manuscripts on astronomy and history, which have never been the subject of an extensive study. The studied observations are: the two comets X/975 P1 and X/998 D1 reported by an anonymous author of the 15th century, the X/1381 V1 comet reported by Ibn al-Qāḍī (1553-1616), the passage of Halley's comet in 1456 reported by Muḥammad al-Zarkašī (1434-1525), the C/1743 X1 comet observed by ‘Abd al-Razzāq ibn Ḥamadūš (1695-1785), which confirm its fan structure, the two observations of Ibn ‘Alī al-Šrīf al-Šalāṭī of the D/1770 L1, and especially the C/1769 P1 comet. The graphic representation of this latter comet is unprecedented in the Muslim West.

Voronoi diagrams – inventor, method, applications

The article presents the person and works of Georgy Voronoi (1868-1908), the inventor of an original method of diagrams, a student of the famous mathematician Andrey Markov. Georgy Voronoi graduated from the Department of Physics and Mathematics at the University of St. Petersburg, and subsequently worked as a professor of mathematics at the Imperial University of Warsaw. One of his students was the future outstanding Polish mathematician Wacław Sierpiński. In his brief lifetime G. Voronoi published several important scientific articles on number theory. In an almost 100 page paper in French published in 1908 he described a method of diagrams, or polygons, which became known as the method of Voronoi diagrams. In the digital age this method and its modifications found new applications. The entry “Voronoi” is getting more popular on the Internet, and the method of Voronoi diagrams and its modifications are widely described in handbooks and scientific articles. The article presents application of the method in the most popular computer programs from the Geographic Information System (GIS) group and presents examples of its usage in research on geographic space in various scientific disciplines.

Matrix Computations of CorwinGreenleaf Multiplicity Functions for Special Unitary Group G = SU (m,n))

In this paper, CorwinGreenleaf multiplicity functions for special unitary group have been studied in the light of the Kirillov–Kostant Theory. This was pioneered by the famous mathematician L. Corwin and F.Greenleaf. The multiplicity function is defined as n(?G?,OH?)=#((OG??pr-1(OG?))/H).In the case where G = SU(m,n), it has been shown that n(OG?,OH?)is at most oneDhaka Univ. J. Sci. 63(2):125-128, 2015 (July)

First graders outwit a famous mathematician

Find zero minus four? Pascal argued it was impossible! Twenty-first-century students, given the right tools, can solve counterintuitive problems.