In this paper, we consider the following fractional nonlinear elliptic problem: [Formula: see text] where [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] is the pseudodifferential operator with symbol [Formula: see text], and [Formula: see text] is a general nonlinearity of Berestycki–Lions type. Employing variational techniques, we prove the existence of least energy solutions. We also study the regularity, decay, sign, radial symmetry, and monotonicity properties of these solutions.
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Vincenzo Ambrosio (2026) studied this question.
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