20120620 
hackbard  after ice SO stuff 
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20120216 
hackbard  hopefully final layout 
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20120211 
hackbard  getting more and more worth, rewrite?!? 
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20120208 
hackbard  outer product 
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20120207 
hackbard  more math, started operators 
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20120207 
hackbard  more math 
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20120206 
hackbard  more math intro 
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20120206 
hackbard  more math 
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20120205 
hackbard  added math found chapter .. 
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20120120 
hackbard  var meth 
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