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  2. Rivalry - Wikipedia

    en.wikipedia.org/wiki/Rivalry

    A rivalry in which competitors remain at odds over specific issues or outcomes, but otherwise maintain civil relations, can be called a friendly rivalry.Institutions such as universities often maintain friendly rivalries, with the idea that "[a] friendly rivalry encourages an institution to bring to the fore the very best it has to offer, knowing that if it is deficient, others will supersede ...

  3. Dual (category theory) - Wikipedia

    en.wikipedia.org/wiki/Dual_(category_theory)

    In category theory, a branch of mathematics, duality is a correspondence between the properties of a category C and the dual properties of the opposite category C op.Given a statement regarding the category C, by interchanging the source and target of each morphism as well as interchanging the order of composing two morphisms, a corresponding dual statement is obtained regarding the opposite ...

  4. Math wars - Wikipedia

    en.wikipedia.org/wiki/Math_wars

    The largest supporter of reform in the US has been the National Council of Teachers of Mathematics. [4]One aspect of the debate is over how explicitly children must be taught skills based on formulas or algorithms (fixed, step-by-step procedures for solving math problems) versus a more inquiry-based approach in which students are exposed to real-world problems that help them develop fluency in ...

  5. Cold War - Wikipedia

    en.wikipedia.org/wiki/Cold_War

    The Cold War was a period of global geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 until the dissolution of the Soviet Union in 1991.

  6. Timeline of rival political parties - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_Rival...

    This article lists a timeline of notable political rivalries by country. Political party rivalries are not to be confused with rival family houses within a nation, or warring factions from different nations. This list will not indicate every rival political party within a nation, such as in multiple-party governments.

  7. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    [6] [7] [8] Quizlet's blog, written mostly by Andrew in the earlier days of the company, claims it had reached 50,000 registered users in 252 days online. [9] In the following two years, Quizlet reached its 1,000,000th registered user. [10] Until 2011, Quizlet shared staff and financial resources with the Collectors Weekly website. [11]

  8. Binary opposition - Wikipedia

    en.wikipedia.org/wiki/Binary_opposition

    The political (rather than analytic or conceptual) critique of binary oppositions is an important part of third wave feminism, post-colonialism, post-anarchism, and critical race theory, which argue that the perceived binary dichotomy between man/woman, civilized/uncivilised, and white/black have perpetuated and legitimized societal power structures favoring a specific majority.

  9. Military victories against the odds - Wikipedia

    en.wikipedia.org/wiki/Military_victories_against...

    Throughout history, in various wars and conflicts, there have been a number of historic victories won by a smaller force, against a larger foe. Conditions and situations for these sorts of military victories against the odds have been numerous. Some victories have been pivotal to the conflict they were part of, or provided inspiration for the ...