Reduction (recursion theory), given sets A and B of natural numbers, is it possible to effectively convert a method for deciding membership in B into a method for deciding membership in A?
Data reduction, simplifying data in order to facilitate analysis
Graph reduction, an efficient version of non-strict evaluation
L-reduction, a transformation of optimization problems which keeps the approximability features
Partial order reduction, a technique for reducing the size of the state-space to be searched by a model checking algorithm
Strength reduction, a compiler optimization where a function of some systematically changing variable is calculated more efficiently by using previous values of the function
Reduce (higher-order function), in functional programming, a family of higher-order functions that process a data structure in some order and build up a return value
Reduced instruction set computing, a CPU design philosophy favoring an instruction set reduced in size and complexity of addressing, to simplify implementation, instruction level parallelism, and compiling
Reduction system, reduction strategy, the application of rewriting systems to eliminate reducible expressions
Reduced form, in statistics, an equation which relates the endogenous variable X to all the available exogenous variables, both those included in the regression of interest (W) and the instruments (Z)
Reduced homology, a minor modification made to homology theory in algebraic topology, designed to make a point have all its homology groups zero
Reduced product, a construction that generalizes both direct product and ultraproduct
Reduced residue system, a set of φ(n) integers such that each integer is relatively prime to n and no two are congruent modulo n
Reduced ring, a ring with no non-zero nilpotent elements
Reduced row echelon form, a certain reduced row echelon form of a matrix which completely and uniquely determines its row space
Reduced word, in a free group, a word with no adjacent generator-inverse pairs
Variance reduction, a procedure used to increase the precision of the estimates that can be obtained for a given number of iterations
Reductio ad absurdum, a form of argument in which a proposition is disproven by following its implications to an absurd consequence
Eidetic reduction, a technique in the study of essences in phenomenology whose goal is to identify the basic components of phenomena
Intertheoretic reduction, in philosophy of science, one theory makes predictions that perfectly or almost perfectly match the predictions of a second theory
Settlements
Reductions, settlements in Spanish America intended to control and Christianize Indians
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