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<p>of  corresponding to the variation  assigns to every  the <a href="page.php?w=tangent_vector">tangent vector</a></p>

<p>In terms of the <a href="page.php?w=tangent_map">tangent map</a>,</p>

<p>Here  is the tangent map of  where  and </p>

<p><big>Properties</big></p>
<p>
* Coordinate representation. If  are the coordinates in an arbitrary chart on  and  then <br/>
* If, for some time instant  and every   then, for every  <br/>
* If  then </p>

<p><big>Examples</big></p>
<p><big>Free particle in R<sup>3</sup></big></p>
<p>A single particle freely moving in  has 3 degrees</p><p>
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