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  2. List of theorems - Wikipedia

    en.wikipedia.org/wiki/List_of_theorems

    Sylvester's law of inertia (quadratic forms) Sylvester–Gallai theorem (plane geometry) Symmetric hypergraph theorem (graph theory) Symphonic theorem (triangle geometry) Synge's theorem (Riemannian geometry) Sz.-Nagy's dilation theorem (operator theory) Szegő limit theorems (mathematical analysis) Szemerédi's theorem (combinatorics)

  3. Raising and lowering indices - Wikipedia

    en.wikipedia.org/wiki/Raising_and_lowering_indices

    It is common convention to use greek indices when writing expressions involving tensors in Minkowski space, while Latin indices are reserved for Euclidean space. Well-formulated expressions are constrained by the rules of Einstein summation: any index may appear at most twice and furthermore a raised index must contract with a lowered index ...

  4. List of set identities and relations - Wikipedia

    en.wikipedia.org/wiki/List_of_set_identities_and...

    This article lists mathematical properties and laws of sets, involving the set-theoretic operations of union, intersection, and complementation and the relations of set equality and set inclusion. It also provides systematic procedures for evaluating expressions, and performing calculations, involving these operations and relations.

  5. Test Acts 1673 & 1678 - Wikipedia

    en.wikipedia.org/wiki/Test_Acts_1673_&_1678

    The 1661, 1672 and 1678 acts were repealed by the Promissory Oaths Act 1871, the Statute Law Revision Act 1863 and the Parliamentary Oaths Act 1866 respectively. [1] Religious tests for officers of the ancient universities were repealed by the Universities Tests Act 1871 for England, the University of Dublin Tests Act 1873 , and the ...

  6. Edexcel - Wikipedia

    en.wikipedia.org/wiki/Edexcel

    As Edexcel is the only privately owned examination board in the UK, questions have been raised on whether the examination board is acting in the best interest of students, or solely as a profit making business, due to the wide range of Edexcel-endorsed text books published by Pearson, the international multi-billion company which owns the board.

  7. Index (economics) - Wikipedia

    en.wikipedia.org/wiki/Index_(economics)

    Index numbers are used especially to compare business activity, the cost of living, and employment. They enable economists to reduce unwieldy business data into easily understood terms. In contrast to a cost-of-living index based on the true but unknown utility function, a superlative index number is an index number that can be calculated. [1]

  8. Index of law articles - Wikipedia

    en.wikipedia.org/wiki/Index_of_law_articles

    Labor and materials – Labor law – labor union – Laches – lacunae – Land use – Land value tax – Landlady – Landlocked – Landlord – Landlord and tenant – Landlord and Tenant Act – Landlord's lien – Lapse – Larceny – Last antecedent rule – Last clear chance – Last will and testament – Latent defect – Law ...

  9. Zipf's law - Wikipedia

    en.wikipedia.org/wiki/Zipf's_law

    Zipf's law (/ z ɪ f /; German pronunciation:) is an empirical law stating that when a list of measured values is sorted in decreasing order, the value of the n-th entry is often approximately inversely proportional to n. The best known instance of Zipf's law applies to the frequency table of words in a text or corpus of natural language: