How to determine the cone membership of a vector
The method to determine the cone membership of a vector is based on the dual cone. It is shown that to check if a vector belongs to a cone what we can do it to obtain its dual cone and evaluating the dot products of the vector by the basic vectors of its vector space part and the edges of the acute cone part; if all the first are all null and all the last are less than or equal to zero, the vector belongs to the iniital cone, otherwise it does not. Some examples are given.
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