Among other small improvements and speed-ups (see history) version 3.13 brings:
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1.
Pathfinder algorithm - removing lines of a weighted network where values of lines are dissimilarities.
Network / Create New Network / Transform / Reduction / Pathfinder*
Only lines which do not violate the triangle inequality are kept.
It can be applied to medium sized networks (networks with up to approx. 10000 vertices).
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2.
Another centrality measure added to Pajek and PajekXXL: Laplacian Centrality.
It can be used for huge networks as well.
For definition see:
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3.
Kamada-Kawai optimization (especially
Separate Components suboption)
speeded up significantly.
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4.
And last but not the least, do not forget to check this site ;)