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  2. Publisher Item Identifier - Wikipedia

    en.wikipedia.org/wiki/Publisher_Item_Identifier

    The Publisher Item Identifier (PII) is a unique identifier used by a number of scientific journal publishers to identify documents. [1] It uses the pre-existing ISSN or ISBN of the publication in question, and adds a character for source publication type, an item number, and a check digit.

  3. Gathering of personally identifiable information - Wikipedia

    en.wikipedia.org/wiki/Gathering_of_personally...

    The gathering of personally identifiable information (PII) refers to the collection of public and private personal data that can be used to identify individuals for various purposes, both legal and illegal. PII gathering is often seen as a privacy threat by data owners, while entities such as technology companies, governments, and organizations ...

  4. Wikipedia:Signatures of living persons - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Signatures_of...

    Criteria to consider would be whether: (1) the subject has published their own signature; (2) secondary sources have reproduced the signature, with the subject's consent; (3) the image of the signature is from a reliable source, (4) the signature is directly relevant to the article in which it is displayed, and (5) the use of the signature ...

  5. Personal data - Wikipedia

    en.wikipedia.org/wiki/Personal_data

    Personal data, also known as personal information or personally identifiable information (PII), [1] [2] [3] is any information related to an identifiable person. The abbreviation PII is widely used in the United States , but the phrase it abbreviates has four common variants based on personal or personally , and identifiable or identifying .

  6. Signature (logic) - Wikipedia

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

    In the context of first-order logic, the symbols in a signature are also known as the non-logical symbols, because together with the logical symbols they form the underlying alphabet over which two formal languages are inductively defined: The set of terms over the signature and the set of (well-formed) formulas over the signature.

  7. Personal identifier - Wikipedia

    en.wikipedia.org/wiki/Personal_identifier

    Personal Identifiers (PID) are a subset of personally identifiable information (PII) data elements, which identify an individual and can permit another person to "assume" that individual's identity without their knowledge or consent. [1] PIIs include direct identifiers (name, social security number) and indirect identifiers (race, ethnicity ...

  8. Metric signature - Wikipedia

    en.wikipedia.org/wiki/Metric_signature

    The signature of a metric tensor is defined as the signature of the corresponding quadratic form. [2] It is the number (v, p, r) of positive, negative and zero eigenvalues of any matrix (i.e. in any basis for the underlying vector space) representing the form, counted with their algebraic multiplicities.

  9. Pseudomathematics - Wikipedia

    en.wikipedia.org/wiki/Pseudomathematics

    Pseudomathematics, or mathematical crankery, is a mathematics-like activity that does not adhere to the framework of rigor of formal mathematical practice. Common areas of pseudomathematics are solutions of problems proved to be unsolvable or recognized as extremely hard by experts, as well as attempts to apply mathematics to non-quantifiable ...