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  2. Help:Basic table markup - Wikipedia

    en.wikipedia.org/wiki/Help:Basic_table_markup

    Note, rowspan="2" and colspan="2" can be used on cells to span multiple rows and columns. Header cells are created with ! Header cell , which can be column or row headers.

  3. jQuery - Wikipedia

    en.wikipedia.org/wiki/JQuery

    For example, jQuery can be used for finding an element in the document with a certain property (e.g. all elements with the h1 tag), changing one or more of its attributes (e.g. color, visibility), or making it respond to an event (e.g. a mouse click).

  4. Raising and lowering indices - Wikipedia

    en.wikipedia.org/wiki/Raising_and_lowering_indices

    For a (0,2) tensor, [1] twice contracting with the inverse metric tensor and contracting in different indices raises each index: =. Similarly, twice contracting with the metric tensor and contracting in different indices lowers each index:

  5. Pockels effect - Wikipedia

    en.wikipedia.org/wiki/Pockels_effect

    With the addition of a Brewster window (left), this change in polarization can be converted to a change in the intensity of the beam, by transmitting only the p-polarized vector component. In optics , the Pockels effect , or Pockels electro-optic effect , is a directionally-dependent linear variation in the refractive index of an optical medium ...

  6. Git - Wikipedia

    en.wikipedia.org/wiki/Git

    Git has two data structures: a mutable index (also called stage or cache) that caches information about the working directory and the next revision to be committed; and an object database that stores immutable objects. The index serves as a connection point between the object database and the working tree.