Semantic Web Interest Group IRC Scratchpad

Welcome to the Semantic Web Interest Group scratchpad generated automatically from discussions on IRC at port 6667 channel #swig by the chump bot, instructions in the chump user manual. Please use UTF-8 charset on IRC and pastebin for code or data more than 10 lines long.

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last updated at 2012-02-20 22:50
nevali: "All gone. It was a mistake for several reasons. PushState or bust."
danbri: "While the Laplacian spectrum has many attractive theoretical properties which make it very useful for partitioning large sparse arrays, it has at least one drawback: the Fiedler eigenvector is associated with the second smallest eigenvalue."
danbri: "The current method of choice for finding a few eigenvectors of very large sparse matrices is the Lanczos method, which tends not to find small eigenvectors as quickly as it finds the largest eigenvectors."
danbri: Compare Mahout's Lanczos documentation, " Which k? It's actually a spread across the entire spectrum: the first few will most certainly be the largest singular values, and the bottom few will be the smallest."
danbri: ...which means -if I understand correctly- a long wait for 2nd smallest, if dataset is big.
danbri: "We present some recent interesting material from mathematical physics and graph theory that has not appeared in social network literature" (1997)
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