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  2. Contour line - Wikipedia

    en.wikipedia.org/wiki/Contour_line

    A contour line (also isoline, isopleth, isoquant or isarithm) of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value. [1][2] It is a plane section of the three-dimensional graph of the function parallel to the -plane. More generally, a contour line for a function of ...

  3. Level set - Wikipedia

    en.wikipedia.org/wiki/Level_set

    Level sets show up in many applications, often under different names. For example, an implicit curve is a level curve, which is considered independently of its neighbor curves, emphasizing that such a curve is defined by an implicit equation. Analogously, a level surface is sometimes called an implicit surface or an isosurface.

  4. Contour integration - Wikipedia

    en.wikipedia.org/wiki/Contour_integration

    The contour integral of a complex function: is a generalization of the integral for real-valued functions. For continuous functions in the complex plane , the contour integral can be defined in analogy to the line integral by first defining the integral along a directed smooth curve in terms of an integral over a real valued parameter.

  5. Saddle point - Wikipedia

    en.wikipedia.org/wiki/Saddle_point

    The name derives from the fact that the prototypical example in two dimensions is a surface that curves up in one direction, and curves down in a different direction, resembling a riding saddle. In terms of contour lines, a saddle point in two dimensions gives rise to a contour map with a pair of lines intersecting at the point. Such ...

  6. Contour set - Wikipedia

    en.wikipedia.org/wiki/Contour_set

    Formal definitions. Given a relation on pairs of elements of set. and an element of. The upper contour set of is the set of all that are related to : {\displaystyle \left\ {y~\backepsilon ~y\succcurlyeq x\right\}} The lower contour set of is the set of all such that is related to them:

  7. Streamlines, streaklines, and pathlines - Wikipedia

    en.wikipedia.org/wiki/Streamlines,_streaklines...

    A scalar function whose contour lines define the streamlines is known as the stream function. Dye line may refer either to a streakline: dye released gradually from a fixed location during time; or it may refer to a timeline: a line of dye applied instantaneously at a certain moment in time, and observed at a later instant.

  8. Plot (graphics) - Wikipedia

    en.wikipedia.org/wiki/Plot_(graphics)

    Plot (graphics) A plot is a graphical technique for representing a data set, usually as a graph showing the relationship between two or more variables. The plot can be drawn by hand or by a computer. In the past, sometimes mechanical or electronic plotters were used.

  9. Isoquant - Wikipedia

    en.wikipedia.org/wiki/Isoquant

    B) Example of an isoquant map with two inputs that are perfect complements. An isoquant (derived from quantity and the Greek word isos, ίσος, meaning "equal"), in microeconomics, is a contour line drawn through the set of points at which the same quantity of output is produced while changing the quantities of two or more inputs. [1][2] The ...