Some computations on trivial canonical-bundle solvmanifolds

We compute the Dolbeault and the Bott-Chern cohomology of six dimensional solvmanifolds endowed with a complex structure of splitting type, introduced by Kasuya, and with trivial canonical bundle. We build, following results by Angella and Kasuya, finite dimensional double subcomplexes (CΓ•,•,∂,∂¯)⊆(∧•,•G/Γ,∂,∂¯) for which the inclusion is an isomorphism in cohomology. We decompose such double complexes into indecomposable ones. Lastly, we study some notions of formality for this class of manifolds, giving a characterization of the ∂∂¯-Lemma property in general complex dimension, and we compute triple ABC-Massey products on them.