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  2. Cross-ratio - Wikipedia

    en.wikipedia.org/wiki/Cross-ratio

    The point D is the harmonic conjugate of C with respect to A and B precisely if the cross-ratio of the quadruple is −1, called the harmonic ratio. The cross-ratio can therefore be regarded as measuring the quadruple's deviation from this ratio; hence the name anharmonic ratio. The cross-ratio is preserved by linear fractional transformations.

  3. Vertical bar - Wikipedia

    en.wikipedia.org/wiki/Vertical_bar

    In chemistry, the vertical line is used in cell notation of electrochemical cells. Example, Zn | Zn 2+ || Cu 2+ | Cu Single vertical lines show components of the cell which do not mix, usually being in different phases. The double vertical line ( || ) is used to represent salt bridge; which is used to allow free moving ions to move.

  4. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    The font used in the TeX rendering is an italic style. This is in line with the convention that variables should be italicized. As Greek letters are more often than not used as variables in mathematical formulas, a Greek letter appearing similar to the TeX rendering is more likely to be encountered in works involving mathematics.

  5. Bresenham's line algorithm - Wikipedia

    en.wikipedia.org/wiki/Bresenham's_line_algorithm

    Bresenham's line algorithm is a line drawing algorithm that determines the points of an n-dimensional raster that should be selected in order to form a close ...

  6. Overline - Wikipedia

    en.wikipedia.org/wiki/Overline

    An overline, overscore, or overbar, is a typographical feature of a horizontal line drawn immediately above the text. In old mathematical notation, an overline was called a vinculum, a notation for grouping symbols which is expressed in modern notation by parentheses, though it persists for symbols under a radical sign.

  7. First Off, What Is a Double Lip Line? - AOL

    www.aol.com/lifestyle/tiktok-telling-double-lip...

    “A double lip line refers to when the lips have two distinct contours: one line that slightly protrudes and defines the outer edge, and another that shapes the inner part of the lip,” explains ...

  8. McCabe–Thiele method - Wikipedia

    en.wikipedia.org/wiki/McCabe–Thiele_method

    For example, if the feed is a saturated liquid, q = 1 and the slope of the q-line is infinite (drawn as a vertical line). As another example, if the feed is saturated vapor, q = 0 and the slope of the q-line is 0 (a horizontal line). [2] The typical McCabe–Thiele diagram in Figure 1 uses a q-line representing a partially vaporized feed.

  9. Dual representation - Wikipedia

    en.wikipedia.org/wiki/Dual_representation

    Then the map () is the reflection about the line through. [8] The self-dual representations are then the ones that lie along the line through α 3 {\displaystyle \alpha _{3}} . These are the representations with labels of the form ( m , m ) {\displaystyle (m,m)} , which are the representations whose weight diagrams are regular hexagons.