%0 Journal Article %T Notes on Calabi-Yau ordinary differential equations %A Jeng-Daw Yu %J Mathematics %D 2008 %I arXiv %X We investigate the structures of Calabi-Yau differential equations and the relations to the arithmetic of the pencils of Calabi-Yau varieties behind the equations. This provides explanations of some observations and computations in a recent paper by Samol and van Straten. %U http://arxiv.org/abs/0810.4040v1