isometry

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isometry

(ī-sŏm′ĭ-trē)
n.
1. Equality of measure.
2. Equality of elevation above sea level.
3. Mathematics A function between metric spaces which preserves distances, such as a rotation or translation in a plane.
4. Biology A proportional change in the size of a part or parts of an organism as the organism grows.
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References in periodicals archive ?
In solution 3 we obtained 9 Noether symmetries, in which 6 are isometries of the corresponding spacetime and the remaining are purely Noether symmetries.
Recently, by proving some Mazur-Ulam type theorems, in [5] and [6], Hatori investigated the problem of linear extendability of surjective isometries between open subgroups (or certain open subsets) of invertible elements of unital Banach algebras see [5, Theorem 3.
This means it is not so easy to determine the isometries that carry tiles in a given patch onto the prototiles.
Isometries of the primary circuit should be a schematic 3D view of the primary cooling circuit of BR2.
The above procedure yields a fractal transform T which is defined in terms of the range-domain assignments (k,j(k)) (along with isometries i(k) if applicable) and [phi]-map parameters ([[alpha].
This quadratic form is interpreted in Physics as the metric tensor of Minkovski spacetime, so this definition is a simply restatement of the fact that Lorentz transformations are precisely the linear transformations which are also isometries of Minkovski spacetime.
Shuffling the data increases the number of isometries in many empirical time series (Figure 6) such as heartbeat intervals, most economic series, atmospheric and oceanic temperature, and also in mathematical bios (Figure 5) and in stochastic series.
Sometimes the students disagreed about the coding, thus giving the teacher an opportunity to further develop their budding ideas about symmetry and the isometries of geometric figures.
We developed the notion of kinetic isometries, where the dancers tried to register an exterior and interior refraction of movement in their bodies, and proceed according to the 'reading' that they achieved of their own states.
1 it follows that the isometries [Mathematical Expression Omitted] (and [Mathematical Expression Omitted] and [Mathematical Expression Omitted] and [Mathematical Expression Omitted]) always have a convergent subsequence, so we may assume [Mathematical Expression Omitted] (and [Mathematical Expression Omitted] and [Mathematical Expression Omitted] and [Mathematical Expression Omitted]).
Among specific topics are sparse hamburger moment multi-sequences, surjective isometries on absolutely continuous vector valued function spaces, extensions of isometries in generalized gyrovector spaces of the positive cones, kernels of adjoints of composition operators with rational symbols of degree two, and associating linear and nonlinear operators.
The notion of normal structure was introduced by Brodskii and Milman (see [4]), when they studied fixed points of isometries.