Cyclic branched covers of alternating knots and $L$-spaces
  For any alternating knot, it is known that the double branched cover of the $3$-sphere branched over the knot is an $L$-space. We show that the three-fold cyclic branched cover is also an $L$-space for any genus one alternating knot. 
Masakazu Teragaito
math.GT