We generalize Kawamata's product formula for volumes of canonical divisors to arbitrary divisors using Okounkov bodies.
Bibliographical noteFunding Information:
This work was partially supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT and Future Planning (S. Choi and J. Park: NRF-2016R1C1B2011446, S.-J. Jung: NRF-2017R1C1B1005166).
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