In a recent note F. Lin showed that if a rational homology sphere Y admits a taut foliation then the Heegaard Floer module HF⁻(Y) contains a copy of F[U]/U as a summand (arXiv:2309.01222). This implies that either the L-space conjecture is false or that Heegaard Floer homology satisfies a geography restriction. We verify that Lin's geography restriction holds for a wide class of rational homology spheres. Indeed, we show that the Heegaard Floer module HF⁻(Y) may satisfy a stronger geography restriction.
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Alfieri et al. (2024) studied this question.
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