We study a class of 3–manifolds called strong L–spaces, which by definition admit a certain type of Heegaard diagram that is particularly simple from the perspective of Heegaard Floer homology. We provide evidence for the possibility that every strong L–space is the branched double cover of an alternating link in the three-sphere. For example, we establish this fact for a strong L–space admitting a strong Heegaard diagram of genus 2 via an explicit classification. We also show that there exist finitely many strong L–spaces with bounded order of first homology; for instance, through order eight, they are connected sums of lens spaces. The methods are topological and graph-theoretic. We discuss many related results and questions.
Keywords: $3$–manifolds, Heegaard diagrams, Heegaard Floer homology, L–spaces
Greene, Joshua  1 ; Levine, Adam  2
@article{10_2140_agt_2016_16_3167,
author = {Greene, Joshua and Levine, Adam},
title = {Strong {Heegaard} diagrams and strong {L{\textendash}spaces}},
journal = {Algebraic and Geometric Topology},
pages = {3167--3208},
year = {2016},
volume = {16},
number = {6},
doi = {10.2140/agt.2016.16.3167},
url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2016.16.3167/}
}
TY - JOUR AU - Greene, Joshua AU - Levine, Adam TI - Strong Heegaard diagrams and strong L–spaces JO - Algebraic and Geometric Topology PY - 2016 SP - 3167 EP - 3208 VL - 16 IS - 6 UR - http://geodesic.mathdoc.fr/articles/10.2140/agt.2016.16.3167/ DO - 10.2140/agt.2016.16.3167 ID - 10_2140_agt_2016_16_3167 ER -
Greene, Joshua; Levine, Adam. Strong Heegaard diagrams and strong L–spaces. Algebraic and Geometric Topology, Tome 16 (2016) no. 6, pp. 3167-3208. doi: 10.2140/agt.2016.16.3167
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