His research interests span theoretical and practical challenges with developing systems that perceive, learn, and reason.

But even with further refinements, it remained a theoretical challenge to produce commercial quantities of product.

Graph coloring enjoys many practical applications as well as theoretical challenges.

Language's emergence in Homo sapiens, from this perspective, presents no special theoretical challenge.

The emergence of such a faculty in Homo sapiens, from this standpoint, presents biological science with a major theoretical challenge.

Once the consensus began to fragment, theoretical challenges found room to enter.

Teller assumed creating the fission bomb would be nothing more than an engineering problem, and that the "Super" provided a much more interesting theoretical challenge.

There are some theoretical challenges to setting up a completely wireless mesh network.

The explanation of this small but positive value is an outstanding theoretical challenge (see the section below).

Much of the theoretical challenge of finding genetic risk factors comes from the heterogeneity of the stroke phenotype.