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In a broad range of data mining tasks, the fundamental challenge is to efficiently explore a very large space of alternatives. The difficulty is two-fold: first, the size of the space raises computational challenges, and second, it can introduce data sparsity issues even in the presence of very larg ...

The amount of data being collected is growing at a staggering pace. The default is to capture and store any and all data, in anticipation of potential future strategic value, and vast amounts of data are being generated by instrumenting key customer and systems touchpoints. Until recently, data was ...