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→Proposed new definition
== Proposed new definition ==
See also http://mathb.in/708, which is the same idea, but perhaps a simpler way of going about it. See also also http://mathb.in/713, which describes how to do a frecency update without bignums.
The new definition is based on exponential decay. It simplifies the algorithm by removing the need for buckets, sampling, and recomputation. It improves the predictions by making them monotonic and continuous.
