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  2. Dilution of precision (navigation) - Wikipedia

    en.wikipedia.org/wiki/Dilution_of_precision...

    Thus a low DOP value represents a better positional precision due to the wider angular separation between the satellites used to calculate a unit's position. Other factors that can increase the effective DOP are obstructions such as nearby mountains or buildings. DOP can be expressed as a number of separate measurements: HDOP

  3. Second-order cone programming - Wikipedia

    en.wikipedia.org/wiki/Second-order_cone_programming

    SOCPs can be solved by interior point methods [2] and in general, can be solved more efficiently than semidefinite programming (SDP) problems. [3] Some engineering applications of SOCP include filter design, antenna array weight design, truss design, and grasping force optimization in robotics. [ 4 ]

  4. Headache (game) - Wikipedia

    en.wikipedia.org/wiki/Headache_(game)

    The playing pieces in the game are known as "cones" (or "men" in the UK) because of their cone shape. This allows them to be stacked on top of one another in unlimited numbers. Each player starts off with four cones, and whenever one player lands on the space occupied by the cone of another, this player captures the opponent's cone.

  5. Nucleolus (game theory) - Wikipedia

    en.wikipedia.org/wiki/Nucleolus_(game_theory)

    A weighted voting game can be represented by only n+1 values: a weight for each player, and the threshold. In a weighted voting game, the core can be computed in time polynomial in n. In contrast, the least-core is NP-hard, but has a pseudopolynomial time algorithm - an algorithm polynomial in n and the maximum weight W. [3]

  6. Cone tracing - Wikipedia

    en.wikipedia.org/wiki/Cone_tracing

    Cone tracing solves certain problems related to sampling and aliasing, which can plague conventional ray tracing. However, cone tracing creates a host of problems of its own. For example, just intersecting a cone with scene geometry leads to an enormous variety of possible results. For this reason, cone tracing has remained mostly unpopular.

  7. Normal cone - Wikipedia

    en.wikipedia.org/wiki/Normal_cone

    The normal cone C X Y or / of an embedding i: X → Y, defined by some sheaf of ideals I is defined as the relative Spec ⁡ (= / +).. When the embedding i is regular the normal cone is the normal bundle, the vector bundle on X corresponding to the dual of the sheaf I/I 2.

  8. Semidefinite programming - Wikipedia

    en.wikipedia.org/wiki/Semidefinite_programming

    A linear programming problem is one in which we wish to maximize or minimize a linear objective function of real variables over a polytope.In semidefinite programming, we instead use real-valued vectors and are allowed to take the dot product of vectors; nonnegativity constraints on real variables in LP (linear programming) are replaced by semidefiniteness constraints on matrix variables in ...

  9. Angular defect - Wikipedia

    en.wikipedia.org/wiki/Angular_defect

    The opposite notion is the excess. Classically the defect arises in two contexts: in the Euclidean plane, angles about a point add up to 360°, while interior angles in a triangle add up to 180°. However, on a convex polyhedron , the angles of the faces meeting at a vertex add up to less than 360° (a defect), while the angles at some vertices ...