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  2. Monty Hall problem - Wikipedia

    en.wikipedia.org/wiki/Monty_Hall_problem

    Third stage: host opens a door. Fourth stage: player makes a final choice. The player wants to win the car, the TV station wants to keep it. This is a zero-sum two-person game. By von Neumann's theorem from game theory, if we allow both parties fully randomized strategies there exists a minimax solution or Nash equilibrium. [9]

  3. Extraneous and missing solutions - Wikipedia

    en.wikipedia.org/wiki/Extraneous_and_missing...

    A missing solution is a valid one which is lost during the solution process. Both situations frequently result from performing operations that are not invertible for some or all values of the variables involved, which prevents the chain of logical implications from being bidirectional.

  4. Singular solution - Wikipedia

    en.wikipedia.org/wiki/Singular_solution

    A singular solution in this stronger sense is often given as tangent to every solution from a family of solutions. By tangent we mean that there is a point x where y s (x) = y c (x) and y' s (x) = y' c (x) where y c is a solution in a family of solutions parameterized by c. This means that the singular solution is the envelope of the family of ...

  5. Two-source hypothesis - Wikipedia

    en.wikipedia.org/wiki/Two-source_hypothesis

    The hypothesis is a solution to what is known as the synoptic problem: the question of how best to account for the differences and similarities between the three synoptic gospels, Matthew, Mark and Luke. The answer to this problem has implications for the order in which the three were composed, and the sources on which their authors drew.

  6. Equation solving - Wikipedia

    en.wikipedia.org/wiki/Equation_solving

    In other words, a solution is a value or a collection of values (one for each unknown) such that, when substituted for the unknowns, the equation becomes an equality. A solution of an equation is often called a root of the equation, particularly but not only for polynomial equations. The set of all solutions of an equation is its solution set.

  7. Sleeping Beauty problem - Wikipedia

    en.wikipedia.org/wiki/Sleeping_Beauty_problem

    We repeat this procedure a large number of times until the box is full of balls of both colours. A single ball is then drawn from the box. In this setting, the question from the original problem resolves to one of two different questions: "what is the probability that a green ball was placed in the box" and "what is the probability a green ball ...

  8. Nirvana fallacy - Wikipedia

    en.wikipedia.org/wiki/Nirvana_fallacy

    It can also refer to the tendency to assume there is a perfect solution to a particular problem. A closely related concept is the "perfect solution fallacy". By creating a false dichotomy that presents one option which is obviously advantageous—while at the same time being completely unrealistic—a person using the nirvana fallacy can attack ...

  9. Exact solutions in general relativity - Wikipedia

    en.wikipedia.org/wiki/Exact_solutions_in_general...

    Noteworthy examples of vacuum solutions, electrovacuum solutions, and so forth, are listed in specialized articles (see below). These solutions contain at most one contribution to the energy–momentum tensor, due to a specific kind of matter or field. However, there are some notable exact solutions which contain two or three contributions ...