https://en.formulasearchengine.com/w/api.php?action=feedcontributions&feedformat=atom&user=124.171.233.222
formulasearchengine - User contributions [en]
2026-08-22T04:56:29Z
User contributions
MediaWiki 1.47.0-wmf.7
https://en.formulasearchengine.com/w/index.php?title=Kelvin%E2%80%93Voigt_material&diff=9910
Kelvin–Voigt material
2013-06-17T10:18:04Z
<p>124.171.233.222: </p>
<hr />
<div>An '''affine vector field''' (sometimes '''affine collineation''' or '''affine''') is a [[projective vector field]] preserving [[geodesic]]s and preserving the [[affine parameter]]. Mathematically, this is expressed by the following condition: <br />
<br />
:<math>(\mathcal{L}_X g_{ab})_{;c}=0<br />
</math><br />
<br />
==See also==<br />
<br />
* [[Conformal vector field]]<br />
* [[Curvature collineation]]<br />
* [[Homothetic vector field]]<br />
* [[Killing vector field]]<br />
* [[Matter collineation]]<br />
* [[Spacetime symmetries]]<br />
<br />
{{relativity-stub}}<br />
<br />
[[Category:Mathematical methods in general relativity]]</div>
124.171.233.222