20120209 
hackbard  fixed outer product, redo inner product! 
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20120209 
hackbard  more math 
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20120209 
hackbard  vector stuff, still need: dual space and inner product 
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20120208 
hackbard  outer product 
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20120207 
hackbard  more math 
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20120206 
hackbard  more math 
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20120205 
hackbard  added math found chapter .. 
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