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  2. Split exact sequence - Wikipedia

    en.wikipedia.org/wiki/Split_exact_sequence

    The term split exact sequence is used in two different ways by different people. Some people mean a short exact sequence that right-splits (thus corresponding to a semidirect product) and some people mean a short exact sequence that left-splits (which implies it right-splits, and corresponds to a direct product).

  3. Fallacy of the undistributed middle - Wikipedia

    en.wikipedia.org/wiki/Fallacy_of_the...

    In this case, the middle term is the class of students, and the first use clearly refers to 'all students'. It is therefore distributed across the whole of its class, and so can be used to connect the other two terms (backpack carriers, and my grandfather). Again, note below that "student" is distributed:

  4. Splitting (psychology) - Wikipedia

    en.wikipedia.org/wiki/Splitting_(psychology)

    Splitting, also called binary thinking, dichotomous thinking, black-and-white thinking, all-or-nothing thinking, or thinking in extremes, is the failure in a person's thinking to bring together the dichotomy of both perceived positive and negative qualities of something into a cohesive, realistic whole.

  5. Cell division - Wikipedia

    en.wikipedia.org/wiki/Cell_division

    The human body experiences about 10 quadrillion cell divisions in a lifetime. [8] The primary concern of cell division is the maintenance of the original cell's genome. Before division can occur, the genomic information that is stored in chromosomes must be replicated, and the duplicated genome must be cleanly divided between progeny cells. [9]

  6. Group extension - Wikipedia

    en.wikipedia.org/wiki/Group_extension

    A split extension is an extension 1 → K → G → H → 1 {\displaystyle 1\to K\to G\to H\to 1} with a homomorphism s : H → G {\displaystyle s\colon H\to G} such that going from H to G by s and then back to H by the quotient map of the short exact sequence induces the identity map on H i.e., π ∘ s = i d H {\displaystyle \pi \circ s ...

  7. Completing the square - Wikipedia

    en.wikipedia.org/wiki/Completing_the_square

    Animation depicting the process of completing the square. (Details, animated GIF version)In elementary algebra, completing the square is a technique for converting a quadratic polynomial of the form ⁠ + + ⁠ to the form ⁠ + ⁠ for some values of ⁠ ⁠ and ⁠ ⁠. [1]

  8. Splitting lemma - Wikipedia

    en.wikipedia.org/wiki/Splitting_lemma

    For a direct sum this is clear, as one can inject from or project to the summands. For a left split sequence, the map t × r: B → A × C gives an isomorphism, so B is a direct sum (3.), and thus inverting the isomorphism and composing with the natural injection C → A × C gives an injection C → B splitting r (2.).

  9. Fission (biology) - Wikipedia

    en.wikipedia.org/wiki/Fission_(biology)

    The object experiencing fission is usually a cell, but the term may also refer to how organisms, bodies, populations, or species split into discrete parts. [ 1 ] [ 2 ] [ 3 ] The fission may be binary fission , in which a single organism produces two parts, or multiple fission , in which a single entity produces multiple parts.