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  2. Substitution (logic) - Wikipedia

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

    The identity substitution, which maps every variable to itself, is the neutral element of substitution composition. A substitution σ is called idempotent if σσ = σ, and hence tσσ = tσ for every term t. When x i ≠t i for all i, the substitution { x 1 ↦ t 1, …, x k ↦ t k} is idempotent if and only if none of the variables x i ...

  3. List of computing and IT abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_computing_and_IT...

    This is a list of computing and IT acronyms, initialisms and abbreviations. 0–9. 1GL—first ... Liskov substitution, Interface segregation, Dependency Inversion;

  4. Glossary of chemistry terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chemistry_terms

    Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...

  5. List of English abbreviations made by shortening words

    en.wikipedia.org/wiki/List_of_English...

    This is a list of common abbreviations in the English language ... substitute subway sum summarize sus (or suss) suspect sush sushi sync or synch synchronization

  6. IUPAC nomenclature of organic chemistry - Wikipedia

    en.wikipedia.org/wiki/IUPAC_nomenclature_of...

    The name of each substitution is prefixed to the hydride cation name. If many substitutions by the same functional group occur, then the number is indicated by prefixing with "di-", "tri-" as with halogenation. (CH 3) 3 O + is trimethyloxonium. CH 3 F 3 N + is trifluoromethylammonium.

  7. Lists of abbreviations - Wikipedia

    en.wikipedia.org/wiki/Lists_of_abbreviations

    List of abbreviations in photography; List of glossing abbreviations (grammatical terms used in linguistic interlinear glossing) List of legal abbreviations; List of medical abbreviations; List of abbreviations for medical organisations and personnel; Reporting mark (owners of rolling stock and other railway equipment) List of style guide ...

  8. Substitution table - Wikipedia

    en.wikipedia.org/wiki/Substitution_table

    A substitution table is used while teaching structures of English. [1] [2] Substitution tables were invented by Harold E. Palmer, [3] who defines substitution as "the process by which any authentic sentence may be multiplied indefinitely by substituting for any of its words or word-groups others of the same grammatical family and within certain semantic limits".

  9. Synonymous substitution - Wikipedia

    en.wikipedia.org/wiki/Synonymous_substitution

    Point substitution mutations of a codon, classified by their impact on protein sequence. A synonymous substitution (often called a silent substitution though they are not always silent) is the evolutionary substitution of one base for another in an exon of a gene coding for a protein, such that the produced amino acid sequence is not modified.