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  2. Permutation - Wikipedia

    en.wikipedia.org/wiki/Permutation

    This can be remedied by using a different bijective correspondence: after using d i to select an element among i remaining elements of the sequence (for decreasing values of i), rather than removing the element and compacting the sequence by shifting down further elements one place, one swaps the element with the final remaining element. Thus ...

  3. Identity (philosophy) - Wikipedia

    en.wikipedia.org/wiki/Identity_(philosophy)

    For example, consider two children with identical bicycles engaged in a race while their mother is watching. The two children have the same bicycle in one sense (qualitative identity) and the same mother in another sense (numerical identity). [3] This article is mainly concerned with numerical identity, which is the stricter notion.

  4. John Dalton - Wikipedia

    en.wikipedia.org/wiki/John_Dalton

    Elements are made of extremely small particles called atoms. Atoms of a given element are identical in size, mass and other properties; atoms of different elements differ in size, mass and other properties. Atoms cannot be subdivided, created or destroyed. Atoms of different elements combine in simple whole-number ratios to form chemical compounds.

  5. Cellular differentiation - Wikipedia

    en.wikipedia.org/wiki/Cellular_differentiation

    Two conclusions are readily apparent from this study. First, epigenetic processes are heavily involved in cell fate determination, as seen from the similar levels of cytosine methylation between induced pluripotent and embryonic stem cells, consistent with their respective patterns of transcription. Second, the mechanisms of reprogramming (and ...

  6. Dimensional analysis - Wikipedia

    en.wikipedia.org/wiki/Dimensional_analysis

    In engineering and science, dimensional analysis is the analysis of the relationships between different physical quantities by identifying their base quantities (such as length, mass, time, and electric current) and units of measurement (such as metres and grams) and tracking these dimensions as calculations or comparisons are performed.

  7. Symbiogenesis - Wikipedia

    en.wikipedia.org/wiki/Symbiogenesis

    The original theory by Lynn Margulis proposed an additional preliminary merger, but this is poorly supported and not now generally believed. [1] Symbiogenesis (endosymbiotic theory, or serial endosymbiotic theory [2]) is the leading evolutionary theory of the origin of eukaryotic cells from prokaryotic organisms. [3]

  8. Sampling (statistics) - Wikipedia

    en.wikipedia.org/wiki/Sampling_(statistics)

    A visual representation of the sampling process. In statistics, quality assurance, and survey methodology, sampling is the selection of a subset or a statistical sample (termed sample for short) of individuals from within a statistical population to estimate characteristics of the whole population.

  9. Monopolistic competition - Wikipedia

    en.wikipedia.org/wiki/Monopolistic_competition

    The "founding father" of the theory of monopolistic competition is Edward Hastings Chamberlin, who wrote a pioneering book on the subject, Theory of Monopolistic Competition (1933). [3] Joan Robinson 's book The Economics of Imperfect Competition presents a comparable theme of distinguishing perfect from imperfect competition.