Abstract
Gaussian noise stability results have recently played an important role in proving results in hardness of approximation in computer science and in the study of voting schemes in social choice. We prove a new Gaussian noise stability result generalizing an isoperimetric result by Borell on the heat kernel and derive as applications:

An optimality result for majority in the context of Condorcet voting.

A proof of a conjecture on “cosmic coin tossing” for low influence functions.
We also discuss a Gaussian noise stability conjecture which may be viewed as a generalization of the “Double Bubble” theorem and show that it implies:

A proof of the “Plurality is Stablest Conjecture”.

That the FriezeJerrum SDP for MAXqCUT achieves the optimal approximation factor assuming the Unique Games Conjecture.
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Supported by an Alfred Sloan fellowship in Mathematics, by NSF CAREER grant DMS0548249 (CAREER), by DOD ONR grant (N00140710506), by BSF grant 2004105, by ISF grant 1300/08, by a Minerva Foundation grant and by ERC Marie Curie Grant 2008 239317.
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Isaksson, M., Mossel, E. Maximally stable Gaussian partitions with discrete applications. Isr. J. Math. 189, 347–396 (2012). https://doi.org/10.1007/s1185601101817
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Keywords
 Social Choice
 Invariance Principle
 Social Choice Function
 Independent Sequence
 Double Bubble