isometry


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

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.
References in periodicals archive ?
The set of all isometric operators which can be extended to be a linear isometry of X into Y is denoted by [J.sub.l].
The condition factor increases from November to February, while the isometry factor decreases, during the months of maximum maturation stage.
It is important to note that because the major axis is not coincident with isometry it summarizes some shape variation (and as well, the remaining axes explain some size variation).
Then we define coordinate charts [Mathematical Expression Omitted] as the composition of the linear isometry of Euclidean space to the tangent space at [Mathematical Expression Omitted] taking the standard frame to the frame [Mathematical Expression Omitted] with the exponential map at [Mathematical Expression Omitted] into [M.sub.k].
If there is no global isometry carrying g on to g!prime^, then the 'past' does not determine the 'future' even up to isomorphism.
Let A = DU be the polar decomposition of A, where U is an isometry and D = [square root of (A*A)] is non-negative.
Non avian theropods and ungulates showed a negative allometry, feline's isometry and birds a positive allometry in the lower leg (Table I).
Consequently, once an initial condition has been chosen, there exists a unique isometry [bar.h] [member of] Isom([N.sub.o], [[bar.g].sub.o]) preserving the Killing fiber flow ([[bar.h].sub.*[xi] = [xi]) and satisfying [[pi].sub.o] [??] [bar.h] = h [??] [[pi].sub.o].
Currently, Gregory is the chairman and CEO of Isometry Advisors Inc as well as a director at Iconic Therapeutics and the Sosei Group Corporation.
Then M has the holonomy representation: [Hol.sub.M] : [[pi].sub.1](M, *) [right arrow] [Isom.sup.+][H.sup.3], where [Isom.sup.+][H.sup.3] is the orientation preserving isometry group of hyperbolic 3-space [H.sup.3].
In 1964, Forelli [11] showed that every isometry on [H.sup.p] for 1 < p < [infinity] and p [not equal to] 2 is a weighted composition operator.