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  2. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    [12] [6] The 2020 Mathematics Subject Classification contains no less than sixty-three first-level areas. [13] Some of these areas correspond to the older division, as is true regarding number theory (the modern name for higher arithmetic) and geometry. Several other first-level areas have "geometry" in their names or are otherwise commonly ...

  3. Wikipedia - Wikipedia

    en.wikipedia.org/wiki/Wikipedia

    [11] [12] While the reliability of Wikipedia was frequently criticized in the 2000s, it has improved over time, receiving greater praise from the late 2010s onward [3] [13] [14] while becoming an important fact-checking site. [15] [16] Articles on breaking news are often accessed as sources for frequently updated information about those events ...

  4. Philosophy - Wikipedia

    en.wikipedia.org/wiki/Philosophy

    Philosophy ('love of wisdom' in Ancient Greek) is a systematic study of general and fundamental questions concerning topics like existence, reason, knowledge, value, mind, and language. It is a rational and critical inquiry that reflects on its methods and assumptions.

  5. Doctor of Philosophy - Wikipedia

    en.wikipedia.org/wiki/Doctor_of_Philosophy

    The typical duration of a doctoral program can depend heavily on the subject and area of research. Usually, three to five years of full-time research work are required. The average time to graduation is 4.5 years. [83] In 2014, the median age of new PhD graduates was 30.4 years. [84]

  6. Psychology - Wikipedia

    en.wikipedia.org/wiki/Psychology

    Psychology is the scientific study of mind and behavior. [1] [2] Its subject matter includes the behavior of humans and nonhumans, both conscious and unconscious phenomena, and mental processes such as thoughts, feelings, and motives.

  7. Cat - Wikipedia

    en.wikipedia.org/wiki/Cat

    A male cat is called a tom or tomcat [11] (or a gib, [12] if neutered). A female is called a queen [13] [14] (or sometimes a molly, [15] if spayed). A juvenile cat is referred to as a kitten. In Early Modern English, the word kitten was interchangeable with the now-obsolete word catling. [16]

  8. Islam - Wikipedia

    en.wikipedia.org/wiki/Islam

    In Arabic, Islam (Arabic: إسلام, lit. 'submission [to God]') [11] [12] [13] is the verbal noun of Form IV originating from the verb سلم (salama), from the triliteral root س-ل-م (), which forms a large class of words mostly relating to concepts of submission, safeness, and peace. [14]