The optimization obtained by the use of these trees is comparable to the optimization obtained by solving a semi group problem on trees.
2.
"It's another negative sign for the semi group, " said Dave Ambrose, a senior trader at SoundView Financial Group in Stamford, Connecticut, which specializes in computer-related companies.
3.
Let " R " be a ring that is graded by the ordered semi group of non-negative integers, and let R _ + denote the ideal generated by positively graded elements.
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