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Mapping is of total length equal to $#{$self->Matrix}, and represents the mapping of a node in graph 1 to the node in graph 2. So the first element in $mapping indicates that the first node in the graph1 is mapped to said node in graph 2, with -1 indicating no match. Most of the time, the size of $mapping is in the 20 to 150 element range, although there are outliers.

Below is an example of how mapping changes when comparing two identical graphs:

-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,- +1 0,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,4,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,4,5,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,4,5,6,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,4,5,6,7,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,4,5,6,7,8,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,4,5,6,7,8,9,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,4,5,6,7,8,9,10,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,4,5,6,7,8,9,10,11,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,4,5,6,7,8,9,10,11,12,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,4,5,6,7,8,9,10,11,12,13,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,-1,-1,-1,-1,-1,-1,-1 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,-1,-1,-1,-1,-1,-1 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,-1,-1,-1,-1,-1 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,-1,-1,-1,-1 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,-1,-1,-1 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,-1,-1 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,-1

And here with dissimilar graphs:

-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,-1,-1,-1,-1,-1,-1,-1,-1,-1 0,-1,-1,-1,-1,-1,-1,-1,-1,-1 1,-1,-1,-1,-1,-1,-1,-1,-1,-1 1,-1,-1,-1,-1,-1,-1,-1,-1,-1 3,-1,-1,-1,-1,-1,-1,-1,-1,-1 3,-1,-1,-1,-1,-1,-1,-1,-1,-1 4,-1,-1,-1,-1,-1,-1,-1,-1,-1 4,-1,-1,-1,-1,-1,-1,-1,-1,-1 6,-1,-1,-1,-1,-1,-1,-1,-1,-1 6,-1,-1,-1,-1,-1,-1,-1,-1,-1 8,-1,-1,-1,-1,-1,-1,-1,-1,-1 8,-1,-1,-1,-1,-1,-1,-1,-1,-1


In reply to Re^6: Optimization Help by jmmitc06
in thread Optimization Help by jmmitc06

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    [Corion]: hippo: Yeah, but at least two years ago, it still was close enough to 20% cut
    [Corion]: But I have a very positive experience with a four day workweek and a three day weekend. I can't easily go back though to full money.
    [Corion]: That is easy without having to pay for a house, a wife or children though. If I had any of these, or any two of these, the decision wouldn't be that easy.
    [ambrus]: wait. I understand no wife and children, but how do you not have to pay for a house?
    [hippo]: I had a low-paid job about 20 years ago and seriously considered going down to a 3-day week. Would have worked 60% of the time for about 80% of the cash.
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