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  2. Position and momentum spaces - Wikipedia

    en.wikipedia.org/wiki/Position_and_momentum_spaces

    Mathematically, the duality between position and momentum is an example of Pontryagin duality. In particular, if a function is given in position space, f(r), then its Fourier transform obtains the function in momentum space, φ(p). Conversely, the inverse Fourier transform of a momentum space function is a position space function.

  3. Position - Wikipedia

    en.wikipedia.org/wiki/Position

    Human position, the spatial relation of the human body to itself and the environment Position (obstetrics), the orientation of a baby prior to birth; Positions of the feet in ballet; Position (music), the location of the hand on a musical instrument; Proprioception, the sense of the relative position of neighbouring parts of the body

  4. General position - Wikipedia

    en.wikipedia.org/wiki/General_position

    General position is a property of configurations of points, or more generally other subvarieties (lines in general position, so no three concurrent, and the like). General position is an extrinsic notion, which depends on an embedding as a subvariety. Informally, subvarieties are in general position if they cannot be described more simply than ...

  5. Quadrant (plane geometry) - Wikipedia

    en.wikipedia.org/wiki/Quadrant_(plane_geometry)

    The expression reads "All Science Teachers Crazy" and proceeding counterclockwise from the upper right quadrant, we see that "All" functions are positive in quadrant I, "Science" (for sine) is positive in quadrant II, "Teachers" (for tangent) is positive in quadrant III, and "Crazy" (for cosine) is positive in quadrant IV.

  6. Science - Wikipedia

    en.wikipedia.org/wiki/Science

    Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. [1] [2] Modern science is typically divided into two or three major branches: [3] the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; and the social sciences (e.g., economics, psychology, and sociology), which ...

  7. Center of pressure (fluid mechanics) - Wikipedia

    en.wikipedia.org/wiki/Center_of_pressure_(fluid...

    Center of pressure is used in sailboat design to represent the position on a sail where the aerodynamic force is concentrated.. The relationship of the aerodynamic center of pressure on the sails to the hydrodynamic center of pressure (referred to as the center of lateral resistance) on the hull determines the behavior of the boat in the wind.

  8. Social position - Wikipedia

    en.wikipedia.org/wiki/Social_position

    A position that is deemed the most important to a given individual is called central, others are peripheral. If a sequence of positions is required to obtain a given position, it can be defined as a career, and a change of position in this context is a promotion or demotion. Some social positions may make it easier for a given person to obtain ...

  9. Positional game - Wikipedia

    en.wikipedia.org/wiki/Positional_game

    If all positions in are taken while no player wins, the game is considered a draw. The classic example of a positional game is tic-tac-toe . In it, X {\displaystyle X} contains the 9 squares of the game-board, F {\displaystyle {\mathcal {F}}} contains the 8 lines that determine a victory (3 horizontal, 3 vertical and 2 diagonal), and the ...