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Codeforces ( Russian: Кодефорсес) is a website that hosts competitive programming contests. [ 1] It is maintained by a group of competitive programmers from ITMO University led by Mikhail Mirzayanov. [ 2] Since 2013, Codeforces claims to surpass Topcoder in terms of active contestants. [ 3] As of 2019, it has over 600,000 registered ...
In mathematics, the lexicographic or lexicographical order (also known as lexical order, or dictionary order) is a generalization of the alphabetical order of the dictionaries to sequences of ordered symbols or, more generally, of elements of a totally ordered set . There are several variants and generalizations of the lexicographical ordering.
Solution set. In mathematics, a solution set is the set of values that satisfy a given set of equations or inequalities . For example, for a set of polynomials over a ring , the solution set is the subset of on which the polynomials all vanish (evaluate to 0), formally. The feasible region of a constrained optimization ...
The subset sum problem (SSP) is a decision problem in computer science. In its most general formulation, there is a multiset of integers and a target-sum , and the question is to decide whether any subset of the integers sum to precisely .[ 1] The problem is known to be NP-complete. Moreover, some restricted variants of it are NP-complete too ...
In mathematics, the Wronskian of n differentiable functions is the determinant formed with the functions and their derivatives up to order n – 1. It was introduced in 1812 by the Polish mathematician Józef Wroński, and is used in the study of differential equations, where it can sometimes show the linear independence of a set of solutions.
Surreal number. A visualization of the surreal number tree. In mathematics, the surreal number system is a totally ordered proper class containing not only the real numbers but also infinite and infinitesimal numbers, respectively larger or smaller in absolute value than any positive real number. Research on the Go endgame by John Horton Conway ...
The international vehicle registration code for the United Kingdom is UK.[2] Prior to 28 September 2021, it was GB.[3] The specification of plates incorporating the UK code was created by the British Number Plate Manufacturers Association, and is seen as the default design by the Department for Transport. [4]
The preliminary injunction by U.S. District Judge Sul Ozerden came the same day the law was set to take effect. A tech industry group sued Mississippi on June 7, arguing the law would ...