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  2. List of decommissioned ships of the Hellenic Navy - Wikipedia

    en.wikipedia.org/wiki/List_of_decommissioned...

    Sotir (A384), ex-RFA Salventure A King Salvor-class salvage vessel, built by William Simons & Co (Renfrew) and equipped with a decompression chamber. Ships of this class had a displacement of 1780 tons and measured 65.4 m in length, 11.3 m in beam with a 3.9 m draught.

  3. AP United States Government and Politics - Wikipedia

    en.wikipedia.org/wiki/AP_United_States...

    Compelling Amish students to attend school past the eighth grade violates the free exercise clause U.S. Const. amend. I; Wis. Stat. § 118.15 (Wisconsin Compulsory School Attendance Law) Tinker v. Des Moines Independent Community School District: 1969 Public school students have the right to wear black armbands in school to protest the Vietnam War

  4. Characteristic function (probability theory) - Wikipedia

    en.wikipedia.org/wiki/Characteristic_function...

    The characteristic function of a uniform U(–1,1) random variable.This function is real-valued because it corresponds to a random variable that is symmetric around the origin; however characteristic functions may generally be complex-valued.

  5. Lattice (order) - Wikipedia

    en.wikipedia.org/wiki/Lattice_(order)

    A lattice is an abstract structure studied in the mathematical subdisciplines of order theory and abstract algebra.It consists of a partially ordered set in which every pair of elements has a unique supremum (also called a least upper bound or join) and a unique infimum (also called a greatest lower bound or meet).

  6. Conjugate gradient method - Wikipedia

    en.wikipedia.org/wiki/Conjugate_gradient_method

    In mathematics, the conjugate gradient method is an algorithm for the numerical solution of particular systems of linear equations, namely those whose matrix is positive-semidefinite. The conjugate gradient method is often implemented as an iterative algorithm , applicable to sparse systems that are too large to be handled by a direct ...

  7. Indian Army - Wikipedia

    en.wikipedia.org/wiki/Indian_Army

    Yudh Abhyas 2012 – US and Indian Army military exercise video trailer Indian Army Aviation Corps Dhruv helicopter ferrying U.S. soldiers during the Yudh Abhyas training exercise in 2009 The Yudh Abhyas exercise is an ongoing series, since 2005 of joint exercises between the Indian and United States armies, agreed upon under the New Framework ...

  8. Clifford algebra - Wikipedia

    en.wikipedia.org/wiki/Clifford_algebra

    A Clifford algebra is a unital associative algebra that contains and is generated by a vector space V over a field K, where V is equipped with a quadratic form Q : V → K.The Clifford algebra Cl(V, Q) is the "freest" unital associative algebra generated by V subject to the condition [c] = , where the product on the left is that of the algebra, and the 1 on the right is the algebra's ...

  9. Tautology (logic) - Wikipedia

    en.wikipedia.org/wiki/Tautology_(logic)

    In mathematical logic, a tautology (from Ancient Greek: ταυτολογία) is a formula that is true regardless of the interpretation of its component terms, with only the logical constants having a fixed meaning.