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  2. 3D rotation group - Wikipedia

    en.wikipedia.org/wiki/3D_rotation_group

    By definition, a rotation about the origin is a transformation that preserves the origin, Euclidean distance (so it is an isometry), and orientation (i.e., handedness of space). Composing two rotations results in another rotation, every rotation has a unique inverse rotation, and the identity map satisfies the

  3. List of Super NES enhancement chips - Wikipedia

    en.wikipedia.org/wiki/List_of_Super_NES...

    The Cx4 chip is a math coprocessor used by Capcom and produced by Hitachi (now Renesas) to perform general trigonometric calculations for wireframe effects, sprite positioning, and rotation. It maps and transforms wireframes in Capcom's second and third games of the Mega Man X series. [2] It is based on the Hitachi HG51B169 DSP and clocked at ...

  4. Rotation formalisms in three dimensions - Wikipedia

    en.wikipedia.org/wiki/Rotation_formalisms_in...

    Rotation formalisms are focused on proper (orientation-preserving) motions of the Euclidean space with one fixed point, that a rotation refers to.Although physical motions with a fixed point are an important case (such as ones described in the center-of-mass frame, or motions of a joint), this approach creates a knowledge about all motions.

  5. Intensive animal farming - Wikipedia

    en.wikipedia.org/wiki/Intensive_animal_farming

    In the United States, farmed animals are excluded by half of all state animal cruelty laws including the federal Animal Welfare Act. The 28-hour law, enacted in 1873 and amended in 1994 states that when animals are being transported for slaughter, the vehicle must stop every 28 hours and the animals must be let out for exercise, food, and water.

  6. Rotation - Wikipedia

    en.wikipedia.org/wiki/Rotation

    A sphere rotating (spinning) about an axis. Rotation or rotational motion is the circular movement of an object around a central line, known as an axis of rotation.A plane figure can rotate in either a clockwise or counterclockwise sense around a perpendicular axis intersecting anywhere inside or outside the figure at a center of rotation.

  7. Rotation matrix - Wikipedia

    en.wikipedia.org/wiki/Rotation_matrix

    Noting that any identity matrix is a rotation matrix, and that matrix multiplication is associative, we may summarize all these properties by saying that the n × n rotation matrices form a group, which for n > 2 is non-abelian, called a special orthogonal group, and denoted by SO(n), SO(n,R), SO n, or SO n (R), the group of n × n rotation ...

  8. Möbius transformation - Wikipedia

    en.wikipedia.org/wiki/Möbius_transformation

    There are 3 representatives fixing {0, 1, ∞}, which are the three transpositions in the symmetry group of these 3 points: /, which fixes 1 and swaps 0 with ∞ (rotation by 180° about the points 1 and −1), , which fixes ∞ and swaps 0 with 1 (rotation by 180° about the points 1/2 and ∞), and / which fixes 0 and swaps 1 with ∞ ...

  9. Three Sisters (agriculture) - Wikipedia

    en.wikipedia.org/wiki/Three_Sisters_(agriculture)

    The Three Sisters planting method is featured on the reverse of the 2009 US Sacagawea dollar. [1]Agricultural history in the Americas differed from the Old World in that the Americas lacked large-seeded, easily domesticated grains (such as wheat and barley) and large domesticated animals that could be used for agricultural labor.