If x E G \ E, then g(x) := (E V x) n F (where E V x is the subspace generated by E U {x}) is a unique point of F, i.e. F, then g: G \ {z} -4 F is the projection with center z of G onto F.
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If x E G \ E, then g(x) := (E V x) n F (where E V x is the subspace generated by E U {x}) is a unique point of F, i.e. F, then g: G \ {z} -4 F is the projection with center z of G onto F.
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