in vector addition we assume that they are translation invariant .however in einsteins space
definition where we believe it to be curved unlike euclidean space ,is t not true that they
will no longer be translation invariant .in that case how could we add vectors?
vectors were introduced because they help physicists specify laws without reference to any
particular coordinate system...can we then say that position vector is really a vector because
after all it depends on where we choose our origin?