Competition is the act of striving against another force for the purpose of achieving dominance or attaining a reward or goal, or out of a biological imperative such as survival. Competition is a term widely used in several fields, including biochemistry, ecology, economics, business, politics, and sports. Competition may be between two or more forces, life forms, agents, systems, individuals, or groups, depending on the context in which the term is used.
Competition may yield various results to the participants, including both intrinsic and extrinsic rewards. Some, such as survival advantages, including favorable territory, are intrinsic biological factors that occur as a result of ecological competition between organisms. Others, such as competition in business and politics, involve competition between humans. In addition, extrinsic symbols, such as trophies, plaques, ribbons, prizes, or laudations, may be given to the winner(s). Such symbolic rewards are commonly used wherever the rewards inherent in the competition are primarily intrinsic, such as at human sporting and academic competitions. In general, the rewards range widely but usually help reinforce the advantage that one participant has over the other participant(s).

American Mathematics Competitions - Organization that administers the AMC, the AIME, and the USAMO, with information about the contests, math problem archives, recommended reading lists, and other resources for students interested in mathematics.
Meta Description: [ The Mathematical Association of America's American Mathematics Competitions is the oldest (began in 1950) and most prestigious mathematics competition for high schools and middle schools. ]
Australian Mathematics Trust - Sponsors a number of competitions in the Australian continent.
Crux Mathematicorum with Mathematical Mayhem - Problem-solving journal at the senior secondary and university undergraduate levels.
Math Competitions in USA - Sample problems, information and links from multiple contests.
Mathematics Archives - links to contests, problem sets, journals sites.
Putnam Exam Information - Results from the Putnam competition, old exams, and problem archives. Includes problem of the day, selected from over 540 different Putnam, National or International Olympiad problems.
Meta Description: [ Putnam Competition Information ]
Valentin Vornicu's MathLinks - Math Olympiad Problem Solving site with a weekly contest, resembling IMO in difficulty, with a large math forum and downloadable materials.
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