Berge's distance 3 pairs of genus 2 Heegaard splittings
Abstract
Following an example discovered by John Berge, we show that there is a 4-component link L ⊂ (S1 x S2)#(S1 x S2) so that, generically, the result of Dehn surgery on L is a 3-manifold with two inequivalent genus 2 Heegaard splittings, and each of these Heegaard splittings is of Hempel distance 3.
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