Emanuela Grinberga arhīva manuskripti / Manuscripts from the archive of Emanuels Grinbergs

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Browsing Emanuela Grinberga arhīva manuskripti / Manuscripts from the archive of Emanuels Grinbergs by Title

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    Analītiskā ģeometrija
    (Latvijas Valsts Universitāte, 1941) Grinbergs, Emanuels
    Analītiskā ģeometrija. Lekciju konspekts, Lasīts fizikas un matemātikas fakultātes studentiem 1940./41. g.
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    Dažas transformācijas elementārā ģeometrijā
    (1935-04-25) Grinbergs, Emanuels
    Referāts nolasīts matēmatisko zinātņu darbinieku kongresā, 25. aprīlī 1935. gadā. Izdots Rīgā, 1936. Izdevusi Matēmatisko zinātņu darbinieku biedrība. Autors Cand. math. E. Grünbergs
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    Daži pētījumi par telpas ruletēm
    (1933-08-14) Grinbergs, Emanuels
    Darbs kvalificēts kā Kandidāta darbs, Konkursa darbs, iesniegts LŪ, Matēmatikas nodaļai 1933. g. 14. augustā. Stud. math. Emanuels Grünbergs, Matr. 14875. Motto "Patientia vincet." Disertācijā 143 lpp. Publicējam bez pilnā teksta arī disertācijas ievadu.
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    Daži trīssakarīgi grafi un to saimes bez Hamiltona cikliem
    (2013-12-17) Grinbergs, Emanuels
    These manuscripts (in Latvian) contain examples of graphs without Hamiltonian cycles. See the flower snark J5 on the page 13. The date here 1.6.78.
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    Geodesic graphs
    (2013-12-17) Grinbergs, Emanuels
    In the article, written in Russian, geodesic graphs, graphs with unique shortest path between every two vertices, are considered. Geodesic graphs are trees, odd cycles, and nontrivial example, the graph of Petersen. The article is dated 21.11.74.
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    Matemātiķim Emanuelam Grinbergam - 80
    (Zvaigžņotā Debess, 1990-01) Riekstiņš, E.
    īss izcilā latviešu matemātiķa Emanuela Grinberga dzīves un darbības apraksts
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    Motives for reflections Addendum to part one
    (2013-12-17) Grinbergs, Emanuels
    The article (in three pieces of manuscripts), written in Russian, contains some reflections on graph theory. It may be written in 1973.
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    Motives for reflections. Part one
    (2013-12-12) Grinbergs, Emanuels
    Facsimile of manuscript from the archive of Emanuels Grinbergs, University of Latvia. The article (in three pieces of manuscripts), written in Russian, contains some reflections on graph theory. It may be written in 1973.
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    Motives for reflections. Part two
    (2013-12-13) Grinbergs, Emanuels
    Facsimile of a manuscript from the archive of Emanuels Grinbergs, University of Latvia. The article (in three pieces of manuscripts), written in Russian, contains some reflections on graph theory. It may be written in 1973. The graph on page 30 built from Petersen's graph is the flower snark J5, see http://en.wikipedia.org/wiki/Flower_snark. E. Grinbergs was building these graphs before 1975, when graphs named flower snarks were introduced by Rufus Isaacs.
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    Notes in the graph theory. A manuscript (with flower snark J5)
    (2013-12-13) Grinbergs, Emanuels
    This fragment of manuscripts, written in Latvian, is taken from a hardcover notebook of E.Grinbergs. The date when these notes started 29.7.72 is clearly seen on the first page, on the page 7 the date is 31.8.72, on 10th - 28.8.73. On page 6, rights, a graph corresponding to flower snark J5 can be clearly seen, see http://en.wikipedia.org/wiki/Flower_snark. This sample of manuscript shows that E. Grinbergs was building these graphs before 1975, when graphs named flower snarks were introduced by Rufus Isaacs.
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    On educational problems of mathematics for the faculty of economics and management
    (2013-12-17) Grinbergs, Emanuels
    Problems concerning education of mathematics for the students of the Faculty of economics and managements are considered.
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    On Grinberg’s Criterion
    (Universiteit Gent, Faculty of Science, 2019) Brinkmann, Gunnar; Zamfirescu, Carol T.
    We generalize Grinberg’s hamiltonicity criterion for planar graphs. To this end, we first prove a technical theorem for embedded graphs. As a special case of a corollary of this theorem we obtain Zaks’ extension of Grinberg’s Criterion (which encompasses earlier work of Gehner and Shimamoto), but the result also implies Grinberg’s formula in its original form in a much broader context. Further implications are a short proof for a slightly strengthened criterion of Lewis bounding the length of a shortest closed walk from below as well as a generalization of a theorem due to Bondy and Häggkvist. See full version of the article: https://www.sciencedirect.com/science/article/pii/S0195669818301343
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    On osculation, superosculation and characteristic points
    (1943-04) Grinbergs, Emanuels
    Translated into English by D. Zeps Original text: Par oskulāciju, superoskulāciju un charakteristiskiem punktiem, https://dspace.lu.lv/dspace/handle/7/46435 Facsimile of the manuscript of dissertation: https://dspace.lu.lv/dspace/handle/7/46446 Facsimile of the manuscript of computations: https://dspace.lu.lv/dspace/handle/7/46433 Page numbers in translation are from original in Latvian
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    One more geodesic graph
    (2013-12-17) Grinbergs, Emanuels
    In this note, written in Latvian, a way to build geodesic graphs, graphs with unique shortest path between every two vertices, is considered. Geodesic graphs are trees, odd cycles, and nontrivial example, the graph of Petersen. The article is dated 17.4.74.
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    Par n dimensiju Eiklīda telpas līknēm
    (1936-10) Grinbergs, Emanuels
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    Par oskulāciju, superoskulāciju un charakteristiskiem punktiem
    (1943-04) Grinbergs, Emanuels
    No Dr. A.Lūša raksturojuma E.Grinberga zinātniskajam darbam: Doktora disertacija, ko E.Grīnbergs sācis strādāt 1940/41 m.g. Latvija Valsts Universitātē un aizstāvējis Rīgas Universitātē 1944.g. /oponenti prof.Dr.A.Lūsis, doc.E.Fogels un doc.E.Leimanis/, uzrāda patstāvīgu pētījumu raksturu un ievērojamus papildinājumus divu ģeometrisko figuru pieskāršanās un oskulaciju teorijai. Superoskulacijas problemai ir aizrādīts ciešs sakars ar noteikta tipa diferencialvienādojumu singulariem atrisinājumiem. Doktora parbaudījumus specialos priekšmetos viņš izturēiis diferencalvienādojumu ģeometriskās teorijas un algebrisko ivariantu teorijas jautājumos.
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    Some reflections on the education of computer scientists
    (2013-12-17) Grinbergs, Emanuels
    This article in Latvian contains some reflections on educational problems what concerns computer science.