Random Combinations with Bounded Differences and Cospan
نویسندگان
چکیده
be an r combination from n, Moser and Abramson [17] used the terms differences for the quantities dj = xJ+l -Xj, j = 1, 2,..., r -1, span for d = xr-xl, and cospan for n -d. It is clear that dj-l is, for j 1,2, . . . , r l , the number of integers, from {1,2,...,«}, which lie "between" Xj and xJ+l. Similarly, (n-d)-l is the number of integers from xr clockwise to xY. To the r-combination (1.1) there corresponds a unique place-indicator vector (sl9 e2,..., sn) defined by (1 if/ = *!,...,*,., [0 otherwise.
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