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  2. Age of the captain - Wikipedia

    en.wikipedia.org/wiki/Age_of_the_captain

    In 2018, the question "If a ship had 26 sheep and 10 goats onboard, how old is the ship's captain?" appeared in a fifth-grade examination for 11-year-old students of a Shunqing primary school. A Weibo commenter noted that the total weight of 26 average sheep and 10 average goats is 7,700 kg (17,000 lb).

  3. Millennium Prize Problems - Wikipedia

    en.wikipedia.org/wiki/Millennium_Prize_Problems

    The Millennium Prize Problems are seven well-known complex mathematical problems selected by the Clay Mathematics Institute in 2000. The Clay Institute has pledged a US $1 million prize for the first correct solution to each problem.

  4. An Introduction to the Philosophy of Mathematics - Wikipedia

    en.wikipedia.org/wiki/An_Introduction_to_the...

    The book has eight chapters and an epilogue with each chapter ending with a list of discussion questions and further readings. [1] [3] Chapter 1 briefly covers what Colyvan calls the "big isms" which dominated early 20th century philosophy of mathematics: logicism, formalism and intuitionism.

  5. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

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  7. Ring (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Ring_(mathematics)

    In mathematics, rings are algebraic structures that generalize fields: multiplication need not be commutative and multiplicative inverses need not exist. Informally, a ring is a set equipped with two binary operations satisfying properties analogous to those of addition and multiplication of integers.

  8. Geometric invariant theory - Wikipedia

    en.wikipedia.org/wiki/Geometric_invariant_theory

    (The book was greatly expanded in two later editions, with extra appendices by Fogarty and Mumford, and a chapter on symplectic quotients by Kirwan.) The book uses both scheme theory and computational techniques available in examples. The abstract setting used is that of a group action on a scheme X. The simple-minded idea of an orbit space

  9. Diophantine geometry - Wikipedia

    en.wikipedia.org/wiki/Diophantine_geometry

    In mathematics, Diophantine geometry is the study of Diophantine equations by means of powerful methods in algebraic geometry.By the 20th century it became clear for some mathematicians that methods of algebraic geometry are ideal tools to study these equations. [1]