Harrison
发表于 2025-3-21 19:56:15
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mettlesome
发表于 2025-3-22 00:09:26
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Neuralgia
发表于 2025-3-22 03:32:53
https://doi.org/10.1007/978-3-319-20714-8es represent the elements of the group while certain sets of edges are associated with the generators. . (1878 a, b) proposed the use of colours to distinguish the edges associated with different generators (see . 1911, pp. 423–427 and the frontispiece). Instead, for the sake of easier printing, we
syring
发表于 2025-3-22 07:18:58
https://doi.org/10.1057/9780230321359e it invariant. The symmetry operations (including the identity) of any figure clearly form a group: the . of the figure. A completely irregular figure has a symmetry group of order 1. The group of order 2 arises when the figure has bilateral symmetry, or when it is transformed into itself by a half
lesion
发表于 2025-3-22 12:31:41
https://doi.org/10.1057/9780230619548g generators and relations for S. can be carried over almost unchanged for a certain infinite group, first studied by . (1926); accordingly, we begin by describing this so-called braid group. The symmetric group (§ 6.2, p. 64) has a subgroup A., of index 2 (§ 6.3, p. 66), which is particularly inter
陪审团每个人
发表于 2025-3-22 16:08:52
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陪审团每个人
发表于 2025-3-22 18:37:28
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观察
发表于 2025-3-23 00:39:36
Background and Outline of the Bookof the periods will make such a group finite. Cases where the number of generators is less than four have been considered in 4.31 and 4.32. We shall prove that the generators may always be represented by real affine reflections, thus preparing the ground for a complete enumeration of the finite grou
idiopathic
发表于 2025-3-23 04:12:56
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匍匐
发表于 2025-3-23 07:25:00
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