In this thesis, we shall give a survey on the relations between lattices and quaternary codes. In particular, we will discuss the construction of Niemeier lattices from self-dual quaternary codes. We introduce some definitions and properties about quaternary codes in the beginning of the thesis. Then we study the relation of lattices and quaternary codes by Construction A. Moreover, we use the method of Kitazume and Harada to embed all Niemeier lattices into the Leech lattice.

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