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  2. Curve orientation - Wikipedia

    en.wikipedia.org/wiki/Curve_orientation

    This definition relies on the fact that every simple closed curve admits a well-defined interior, which follows from the Jordan curve theorem. The inner loop of a beltway road in a country where people drive on the right side of the road is an example of a negatively oriented ( clockwise ) curve.

  3. Orientation (vector space) - Wikipedia

    en.wikipedia.org/wiki/Orientation_(vector_space)

    The orientation of a real vector space or simply orientation of a vector space is the arbitrary choice of which ordered bases are "positively" oriented and which are "negatively" oriented. In the three-dimensional Euclidean space , right-handed bases are typically declared to be positively oriented, but the choice is arbitrary, as they may also ...

  4. Green's theorem - Wikipedia

    en.wikipedia.org/wiki/Green's_theorem

    Lemma 1 (Decomposition Lemma) — Assume is a rectifiable, positively oriented Jordan curve in the plane and let be its inner region. For every positive real δ {\displaystyle \delta } , let F ( δ ) {\displaystyle {\mathcal {F}}(\delta )} denote the collection of squares in the plane bounded by the lines x = m δ , y = m δ {\displaystyle x=m ...

  5. Line of beauty - Wikipedia

    en.wikipedia.org/wiki/Line_of_beauty

    Serpentine lines from Hogarth's The Analysis of Beauty. Line of beauty is a term and a theory in art or aesthetics used to describe an S-shaped curved line (a serpentine line) appearing within an object, as the boundary line of an object, or as a virtual boundary line formed by the composition of several objects.

  6. Differential form - Wikipedia

    en.wikipedia.org/wiki/Differential_form

    An example of a 1-dimensional manifold is an interval [a, b], and intervals can be given an orientation: they are positively oriented if a < b, and negatively oriented otherwise. If a < b then the integral of the differential 1 -form f ( x ) dx over the interval [ a , b ] (with its natural positive orientation) is

  7. Elements of art - Wikipedia

    en.wikipedia.org/wiki/Elements_of_art

    Mark making is the interaction between the artist and the materials they are using. [1] It provides the viewer of the work with an image of what the artist had done to create the mark, reliving what the artist had done at the time. [1] Materiality is the choice of materials used and how it impacts the work of art and how the viewer perceives it ...

  8. Why does the I-95 Pawtucket S curve exist? Here's the history

    www.aol.com/sports/why-does-95-pawtucket-curve...

    Why the Pawtucket S curve exists on I-95. When the government was gearing up to build the interstate highway system in the 1950s, the main concern many people had was whether their land would be ...

  9. Euclidean plane - Wikipedia

    en.wikipedia.org/wiki/Euclidean_plane

    Let C be a positively oriented, piecewise smooth, simple closed curve in a plane, and let D be the region bounded by C. If L and M are functions of ( x , y ) defined on an open region containing D and have continuous partial derivatives there, then [ 7 ] [ 8 ]