منابع مشابه
Unless reasoning.
We report the results of two experiments investigating conditional inferences from conditional unless assertions, such as Juan is not in León unless Nuria is in Madrid. Experiments 1 and 2 check Fillenbaum's hypothesis about the semantic similarity of unless with if not and only if assertions; both also examine inferential endorsements (Experiment 1) and endorsements and latencies (Experiment 2...
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Let γ(G) be the domination number of a graph G, and let αk(G) be the maximum number of vertices in G, no two of which are at distance ≤ k in G. It is easy to see that γ(G) ≥ α2(G). In this note it is proved that γ(G) is bounded from above by a linear function in α2(G) if G has no large complete bipartite graph minors. Extensions to other parameters αk(G) are also derived.
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For a set of distances D = {d1, . . . , dk} a set A is called D-avoiding if no pair of points of A is at distance di for some i. We show that the density of A is exponentially small in k provided the ratios d1/d2, d2/d3, . . . , dk−1/dk are all small enough. This resolves a question of Székely, and generalizes a theorem of Furstenberg-Katznelson-Weiss, Falconer-Marstrand, and Bourgain. Several ...
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We study property testing in the context of distributed computing, under the classical CONGEST model. It is known that testing whether a graph is triangle-free can be done in a constant number of rounds, where the constant depends on how far the input graph is from being triangle-free. We show that, for every connected 4-node graph H , testing whether a graph is H-free can be done in a constant...
متن کاملBuilding Blocks and Excluded Sums
Figure 3. The four terms PPij, PSij, SPij, and SSij “wrap around” the excluded center cell i,j to cover the shaded region. Figure 2. The prefix algorithm. The prefix and suffix sums Pi ,Si are computed as cumulative sums starting from the left and from the right. The excluded sum is then Pi–1 + Si+1. If we peel away, layer by layer, the complexities of the fast multipole method, we find that it...
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ژورنال
عنوان ژورنال: American Journal of Orthodontics and Dentofacial Orthopedics
سال: 2018
ISSN: 0889-5406
DOI: 10.1016/j.ajodo.2018.07.002