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Course 2 (Advanced Algebra, Geometry, Statistics):
Course 2 (Advanced Algebra, Geometry, Statistics):

Lie Differentiation and Angular Momentum
Lie Differentiation and Angular Momentum

... where (i, j, k) constitutes any of the three cyclic permutations of (1, 2, 3), including the unity. Here, the coordinates are Cartesian. Starting with chapter 2 posted in this web site (the first one to be taught in the Kähler calculus phases (II and III) of the summer school), we have not used tan ...
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... • The basis vector vi identified with the ith such state can be represented as a list of numbers: ...
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... • We ‘resolve’ vectors into components using the x and y axes system. • Each component of the vector is shown as a magnitude and a direction. • The directions are based on the x and y axes. We use the “unit vectors” i and j to designate the x and y axes. ...
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The Geometry of Linear Equations

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3.7.5 Multiplying Vectors and Matrices

... It is important to realize that you can use \dot" for both left- and rightmultiplication of vectors by matrices. Mathematica makes no distinction between \row" and \column" vectors. Dot carries out whatever operation is possible. (In formal terms, a.b contracts the last index of the tensor a with th ...
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Definitions in Problem 1 of Exam Review

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Introduction Last year we studied the electric and the magnetic field

< 1 ... 204 205 206 207 208 209 210 211 212 214 >

Four-vector

In the theory of relativity, a four-vector or 4-vector is a vector in Minkowski space, a four-dimensional real vector space. It differs from a Euclidean vector in how its magnitude is determined. The transformations that preserve this magnitude are the Lorentz transformations, which include spatial rotations, boosts (a change by a constant velocity to another inertial reference frame), and temporal and spatial inversions. Regarded as a homogeneous space, the transformation group of Minkowski space is the Poincaré group, which adds to the Lorentz group the group of translations. The Lorentz group may be represented by 4×4 matrices.The article considers four-vectors in the context of special relativity. Although the concept of four-vectors also extends to general relativity, some of the results stated in this article require modification in general relativity.
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