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when toggle format what by license comment
Dec 15, 2010 at 14:48 comment added Jeff Strom I didn't claim it was better; I simply offered other existing notation, as requested by the OP.
Dec 15, 2010 at 11:02 comment added Pietro Majer (but why $d_i$ is better than $\tau_i$, so as to require a new answer?)
Dec 14, 2010 at 1:45 history answered Jeff Strom CC BY-SA 2.5