difference sets

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• Difference set — For the concept of set difference, see complement (set theory). In combinatorics, a (v,k,λ) difference set is a subset D of a group G such that the order of G is v, the size of D is k, and every nonidentity element of G can be expressed as a… …   Wikipedia

• Difference and Repetition —   …   Wikipedia

• Difference-map algorithm — Iterations 0, 100, 200, 300 and 400 in the difference map reconstruction of a grayscale image from its Fourier transform modulus The difference map algorithm is a search algorithm for general constraint satisfaction problems. It is a meta… …   Wikipedia

• Difference map algorithm — The difference map algorithm is a search algorithm for general constraint satisfaction problems. It is a meta algorithm in the sense that it is built from more basic algorithms that perform projections onto constraint sets. From a mathematical… …   Wikipedia

• difference + politics —    by Paul Patton   Deleuze s ontological conception of a world of free differences suggests a defence of the particular against all forms of universalisation or representation. Every time there is representation, he argues, there is an… …   The Deleuze dictionary

• difference + politics —    by Paul Patton   Deleuze s ontological conception of a world of free differences suggests a defence of the particular against all forms of universalisation or representation. Every time there is representation, he argues, there is an… …   The Deleuze dictionary

• Difference engine — For the novel by William Gibson and Bruce Sterling, see The Difference Engine. The London Science Museum s difference engine, built from Babbage s design. The design has the same precision on all columns, but when calculating converging… …   Wikipedia

• Difference hierarchy — In set theory, the difference hierarchy over a pointclass is a hierarchy of larger pointclasses generated by taking differences of sets. If Γ is a pointclass, then the set of differences in Γ is . In usual notation, this set is denoted by 2 Γ.… …   Wikipedia

• Difference density map — In protein crystallography, a difference density map shows the spatial distribution of the difference between the measured electron density of the crystal and the electron density explained by the current model. Conventionally, they are displayed …   Wikipedia

• difference — noun 1) the difference between the two sets of data Syn: dissimilarity, contrast, distinction, differentiation, variance, variation, divergence, disparity, deviation, polarity, gulf, gap, imbalance, contradiction, contradistinction …   Thesaurus of popular words

• difference — noun 1) the difference between the two sets of data Syn: dissimilarity, contrast, distinction, differentiation, variance, variation, divergence, disparity, contradiction 2) we ve had our differences Syn: disagreement …   Synonyms and antonyms dictionary