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Published November 18, 2015 | Submitted
Book Section - Chapter Open

Surface Operators

Abstract

We give an introduction and a broad survey of surface operators in 4d gauge theories, with a particular emphasis on aspects relevant to AGT correspondence. One of the main goals is to highlight the boundary between what we know and what we don't know about surface operators. To this end, the survey contains many open questions and suggests various directions for future research. Although this article is mostly a review, we did include a number of new results, previously unpublished.

Additional Information

© 2015 Springer International Publishing Switzerland.

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