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math.GT2000
On p-symmetric Heegaard splittings
Michele Mulazzani
We show that every p-fold strictly-cyclic branched covering of a b-bridge link in admits a p-symmetric Heegaard splitting - in the sense of Birman and Hilden - of genus $g=(b…
math.GT2000
2-symmetric transformations for 3-manifolds of genus two
Luigi Grasselli, Michele Mulazzani, Roman Nedela
As previously known, all 3-manifolds of genus two can be represented by edge-coloured graphs uniquely defined by 6-tuples of integers satisfying simple conditions. The present pape…
math.GT2000
Genus one 1-bridge knots and Dunwoody manifolds
Luigi Grasselli, Michele Mulazzani
In this paper we show that all 3-manifolds of a family introduced by M. J. Dunwoody are cyclic coverings of lens spaces (eventually ), branched over genus one 1-bridge kno…