Wyniki wyszukiwania - BazTech

1

Lemat, który nie jest Burnside’a?

Tomaszewski Witold

MINUT Matematyka i Informatyka na Uczelniach Technicznych

|

2023

|

Nr 5

137-148

PL

Artykuł prezentuje lemat Cauchy’ego-Frobeniusa-Burnside’a na przykładach.

2

Iteracje odwzorowań, orbity, twierdzenie Banacha o punkcie stałym

Ludew Jan Jakub, Różański Michał, Smoleń-Duda Barbara, Wituła Roman, Czernik Szymon

MINUT Matematyka i Informatyka na Uczelniach Technicznych

|

2021

|

Nr 3

166-195

PL

Praca stanowi zbiór zadań i problemów poświęconych wprowadzeniu w teorią punktów stałych, która realizowana jest jedynie w zarysie na drugim semestrze studiów na kierunku matematyka. Stanowi niezależny byt, ale w gruncie rzeczy jest uzupełnieniem finalizowanego opracowania teoretycznego, które również zamierzamy opublikować w tym czasopiśmie.

3

The thermoluminescence of meteorites: a brief 2010 perspective

Sears D. W. G.

Geochronometria

|

2011

|

Vol. 38, no. 3

303-313

EN

Early work on meteorite thermoluminescence, influenced by pottery dating and dosimetry applications, demonstrated a relationship between natural thermoluminescence and (1) the orbital per-ihelion of a meteorite and (2) the terrestrial age (time since fall) of a meteorite. For 14 years natural TL measurements were routinely made on newly recovered Antarctic meteorites to help identify unu-sual thermal and radiation histories, and to sort them by terrestrial age and perihelion. Two examples of the value of such data are presented, an Antarctic meteorite that underwent a major orbit change prior to fall and the collection mechanics of meteorites at the Lewis Cliff collection site. A second major area of focus for meteorite TL, that has no non-meteorite heritage, is the use of their induced TL to provide an extraordinarily sensitive and quantitative means of exploring metamorphic intensity and palaeothermometry. While especially valuable for unequilibrated ordinary chondrites, these types of measurement have proved useful with virtually every major class of meteorite, asteroidal and plan-etary. The challenge now is to extend the technique to small particles, micrometeorites, interplanetary dust particles, and cometary particles.

4

Minimal actions on Cantor cubes

Turek S.

Bulletin of the Polish Academy of Sciences. Mathematics

|

2003

|

Vol. 51, no 2

129-138

EN

There are investigated minimal actions of countable groups on the Cantor cube of weight continuum. In particular there is shown that for every countable abelian group G there exists a homomorphism pi of G into the group Homeo(D^2omega) of all homeomorphisms of the Cantor cube D^2omega onto itself such that for every x is a member of a set D^2omega the orbit {pi{g)(x):g is a member of a set G} is dense in the cube.