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  2. Antipodal point - Wikipedia

    en.wikipedia.org/wiki/Antipodal_point

    The two points P and P ' (red) are antipodal because they are ends of a diameter PP ', a segment of the axis a (purple) passing through the sphere's center O (black). P and P ' are the poles of a great circle g (green) whose points are equidistant from each (with a central right angle).

  3. Negative relationship - Wikipedia

    en.wikipedia.org/wiki/Negative_relationship

    Diametrically opposed points represent a correlation of –1 = cos(π), called anti-correlation. Any two points not in the same hemisphere have negative correlation. An example would be a negative cross-sectional relationship between illness and vaccination, if it is observed that where the incidence of one is higher than average, the incidence ...

  4. Differential game - Wikipedia

    en.wikipedia.org/wiki/Differential_game

    Differential games are related closely with optimal control problems. In an optimal control problem there is single control () and a single criterion to be optimized; differential game theory generalizes this to two controls (), and two criteria, one for each player. [3]

  5. Polar opposite - Wikipedia

    en.wikipedia.org/wiki/Polar_opposite

    A polar opposite is the diametrically opposite point of a circle or sphere. It is mathematically known as an antipodal point, or antipode when referring to the Earth. It is also an idiom often used to describe people and ideas that are opposites. Polar Opposite or Polar Opposites may also refer to: Polar Opposite, a 2011 EP by Sick Puppies

  6. Antipode - Wikipedia

    en.wikipedia.org/wiki/Antipode

    Antipodes, points on the Earth's surface that are diametrically opposed; Antipodes Islands, inhospitable volcanic islands south of New Zealand; The Antipodes, a principally British term for Australia and New Zealand (or more broadly the area known as Australasia), based on a rough proximity to the antipode of Britain

  7. A US-Russia prisoner exchange with diametrically opposed ...

    www.aol.com/us-russia-prisoner-exchange...

    The harrowing ordeals of three Americans jailed in Russia came to a happy ending around midnight on Thursday, when they stepped off a plane and into emotional embraces with family members waiting ...

  8. Lexell's theorem - Wikipedia

    en.wikipedia.org/wiki/Lexell's_theorem

    An area formula for spherical triangles analogous to the formula for planar triangles. Given a fixed base , an arc of a great circle on a sphere, and two apex points and on the same side of great circle , Lexell's theorem holds that the surface area of the spherical triangle is equal to that of if and only if lies on the small-circle arc , where and are the points antipodal to and , respectively.

  9. Post-processual archaeology - Wikipedia

    en.wikipedia.org/wiki/Post-processual_archaeology

    The post-processualists' approach to archaeology is diametrically opposed to that of the processualists. The processualists, as positivists, believed that the scientific method should and could apply to archaeological investigation, therefore allowing archaeologists to present objective statements about past societies based upon the evidence.