Mma vectors do not have to be one-dimensional

*To*: mathgroup at yoda.physics.unc.edu*Subject*: Mma vectors do not have to be one-dimensional*From*: pwm at macaw.jhuapl.edu (Phil W. Miller x8335 1-e138)*Date*: Thu, 8 Oct 92 13:03:59 EDT

I posted a question yesterday regarding a problem I had with Mma ignoring dimension for vectors. Well, it was me, not Mma, that ignored dimension when I defined my "vector" as x as {a,b}. One can have row or column vectors in Mma. It is simply a matter of defining a column vector x as {{a},{b}}, or a row vector y as {{a,b}}. Then I do not need to worry about Dot giving me the inner product instead of the intended outer product for the expression A.x . Transpose[A.x] when x is one-dimensional. After the rather obvious solution, I am rather embarrassed for needing to ask the question. Thanks to Jack Lee and Jerry Keiper for your help. Phil Miller