# A Product Formula for the Normalized Volume of Free Sums of Lattice Polytopes

@article{Chen2019APF, title={A Product Formula for the Normalized Volume of Free Sums of Lattice Polytopes}, author={Tianran Chen and Robert Davis}, journal={Advances in Algebra}, year={2019} }

The free sum is a basic geometric operation among convex polytopes. This note focuses on the relationship between the normalized volume of the free sum and that of the summands. In particular, we show that the normalized volume of the free sum of full dimensional polytopes is precisely the product of the normalized volumes of the summands.

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