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  2. Free variables and bound variables - Wikipedia

    en.wikipedia.org/wiki/Free_variables_and_bound...

    This expression can then be determined by doing an inorder traversal of the tree. Variable-binding operators are logical operators that occur in almost every formal language. A binding operator Q takes two arguments: a variable v and an expression P, and when applied to its arguments produces a new expression Q(v, P).

  3. Wikipedia:Citing sources - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Citing_sources

    This page in a nutshell: Cite reliable sources.You can add a citation by selecting from the drop-down menu at the top of the editing box.In markup, you can add a citation manually using ref tags.

  4. Op. cit. - Wikipedia

    en.wikipedia.org/wiki/Op._cit.

    The abbreviation is used in an endnote or footnote to refer the reader to a cited work, standing in for repetition of the full title of the work. [1] Op. cit. thus refers the reader to the bibliography, where the full citation of the work can be found, or to a full citation given in a previous footnote.

  5. APA style - Wikipedia

    en.wikipedia.org/wiki/APA_style

    APA style (also known as APA format) is a writing style and format for academic documents such as scholarly journal articles and books. It is commonly used for citing sources within the field of behavioral and social sciences, including sociology, education, nursing, criminal justice, anthropology, and psychology.

  6. The Chicago Manual of Style - Wikipedia

    en.wikipedia.org/wiki/The_Chicago_Manual_of_Style

    The Chicago Manual of Style is published in hardcover and online. The online edition includes the searchable text of the 16th through 18th—its most recent—editions with features such as tools for editors, a citation guide summary, and searchable access to a Q&A, where University of Chicago Press editors answer readers' style questions.

  7. Expression (mathematics) - Wikipedia

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

    A formal expression is a kind of string of symbols, created by the same production rules as standard expressions, however, they are used without regard to the meaning of the expression. In this way, two formal expressions are considered equal only if they are syntactically equal, that is, if they are the exact same expression.

  8. Help:Find sources - Wikipedia

    en.wikipedia.org/wiki/Help:Find_sources

    Once you have found one good scholarly source, you can see what sources it cites and what cited it (citation chaining). This video describes citation chaining using Google Scholar. If you are having trouble accessing a particular source, e.g. due to privacy laws, try this list of ways to get around IP-based restrictions.

  9. Parenthetical referencing - Wikipedia

    en.wikipedia.org/wiki/Parenthetical_referencing

    Complete citations are provided in alphabetical order in a section following the text, usually designated as "Works cited" or "References." The difference between a "works cited" or "references" list and a bibliography is that a bibliography may include works not directly cited in the text. All citations are in the same font as the main text.