Издательство: | Книга по требованию |
Дата выхода: | июль 2011 |
ISBN: | 978-6-1312-6751-2 |
Объём: | 84 страниц |
Масса: | 147 г |
Размеры(В x Ш x Т), см: | 23 x 16 x 1 |
High Quality Content by WIKIPEDIA articles! In mathematics, a Clifford–Klein form is a double coset space ?G/H, where G is a reductive Lie group, H a closed subgroup of G, and ? a discrete subgroup of G that acts properly discontinuously on the homogeneous space G/H. A suitable discrete subgroup ? may or may not exist, for a given G and H. If ? exists, there is the question of whether ?G/H can be taken to be a compact space, called a compact Clifford–Klein form. When H is itself compact, classical results show that a compact Clifford–Klein form exists. Otherwise it may not, and there are a number of negative results.
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