Existence result for the CR-Yamabe equation
DOI:
https://doi.org/10.6092/issn.2240-2829/4017Keywords:
Reeb vector field, mountain-pass with symmetryAbstract
In this note we will prove that the CR-Yamabe equation has infinitely many changing-sign solutions. The problem is variational but the associated functional does not satisfy the Palais-Smale compactness condition; by mean of a suitable group action we will define a subspace on which we can apply the minimax argument of Ambrosetti-Rabinowitz. The result solves a question left open from the classification results of positive solutions by Jerison-Lee in the '80s.
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