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An explicit algebraic vector in cartesian coordinates
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The first and third components
The "nth" component returns unevaluated
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Substituting n by something concrete, the component is obtained
Here A_ is an abstract non-projected vector; by default, in the framework of the Physics[Vectors] package, symbols ending with "_" represent non-projected vectors (to change this postfix see Setup:
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The second component
When is replaced by a projected vector, the selection of the component is performed
It is also possible to work all abstract; this is the "nth" component of a non-projected vector
Component admits as argument a generic algebraic vectorial expression, for instance
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Note however that when the expression passed to Component is not a vector, the computation is interrupted with an error message
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