Anony-Mousse
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 Mar13 awarded Nice Question Dec20 awarded Constituent Dec16 awarded Caucus Oct16 awarded Notable Question Jun19 awarded Nice Answer Jun6 comment Pearson correlation and metric properties Interesting idea. z-standardization is a linear transformation in the transposed space. If metric properties survive transposition, this would pretty much yield a proof. Feb26 comment Precision and performance of Euclidean distance I don't get any precision problems on this example. Feb21 awarded Notable Question Feb5 awarded Commentator Feb5 comment Is it faster to count to the infinite going one by one or two by two? To make it more explicit: when everybody moves from room $i$, to room $2i$ - who will be in a room with an odd number afterwards? The room must have become empty! And when you are told to move to room $2i$, that room must also be empty - because whoever was in there just moved to room $4i$. Everbody moves to a room that just became vacant. Feb5 comment Is it faster to count to the infinite going one by one or two by two? Try to prove that the room is occupied. Because whoever was in there, supposedly moved to room $\pi(\pi(j))$, didn't he? Therefore, the destination room became empty. Feb5 revised Is it faster to count to the infinite going one by one or two by two? added 994 characters in body Feb4 revised Is it faster to count to the infinite going one by one or two by two? added 73 characters in body Feb4 awarded Yearling Feb3 awarded Teacher Feb3 answered Is it faster to count to the infinite going one by one or two by two? Feb1 comment Estimating the geometric shape of a point cloud without using the vertex information Define "geometric shape". Have you looked at alpha shapes? I don't think clustering is what you are looking for. Why would you lose vertex information the first place? Jul17 awarded Popular Question Jun2 comment Cosine similarity / distance and triangle equation Note that in C I asked about it being pseudo metric: en.wikipedia.org/wiki/Pseudometric_space which does allow non-identical vectors to have distance 0. Feb24 awarded Popular Question