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Communications of the ACM

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The Research archive provides access to all Research articles published in past issues of Communications of the ACM.

December 2010


From Communications of the ACM

Technical Perspective: QIP = PSPACE Breakthrough

It is now clear that for a wide range of problems, quantum computers offer little or no advantage over their classical counterparts.


From Communications of the ACM

Technical Perspective: Iterative Signal Recovery From Incomplete Samples

You are given a large set of data values, and you are requested to compress, clean, recover, recognize, and/or predict it. Sounds familiar? This is the…


From Communications of the ACM

QIP = PSPACE

QIP = PSPACE

The collection of computational problems having quantum interactive proof systems consists precisely of those problems solvable with an ordinary classical computer using at most a polynomial amount of memory (or QIP = PSPACE …


From Communications of the ACM

CoSaMP: Iterative Signal Recovery From Incomplete and Inaccurate Samples

CoSaMP: Iterative Signal Recovery From Incomplete and Inaccurate Samples

Compressive sampling (CoSa) is a new paradigm for developing data sampling technologies. The main computational challenge in CoSa is to reconstruct a compressible signal from the reduced representation acquired by the sampling…