منابع مشابه
Vertical perimeter versus horizontal perimeter
Given k ∈ N, the k’th discrete Heisenberg group, denoted H Z , is the group generated by the elements a1, b1, . . . , ak, bk, c, subject to the commutator relations [a1, b1] = . . . = [ak, bk] = c, while all the other pairs of elements from this generating set are required to commute, i.e., for every distinct i, j ∈ {1, . . . , k} we have [ai, aj ] = [bi, bj ] = [ai, bj ] = [ai, c] = [bi, c] = ...
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ژورنال
عنوان ژورنال: British Journal of General Practice
سال: 2009
ISSN: 0960-1643,1478-5242
DOI: 10.3399/bjgp09x454205