Lets suppose we have a two vectors where ##\vec u=c\vec r## where c is just a reel constant number.Can we say ##\vec u## and ##\vec r## is parallel.(adsbygoogle = window.adsbygoogle || []).push({});

How can we define ""parallel" vectors ? Like in most general way.

I know that when c is positive real number they are definitly parallel.But when c is negative still can we call them "parallel".I am thinking yes we can but I need some solid proof

Thanks

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# I Whats the meaning of Parallel in Vectors

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