THE $3k-4$ THEOREM FOR ORDERED GROUPS
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DOI: 10.1017/s0004972717000715
Abstract: Recently, Freiman et al. [‘Small doubling in ordered groups’, J. Aust. Math. Soc. 96(3) (2014), 316–325] proved two ‘structure theorems’ for ordered groups. We give elementary proofs of these two theorems. read more here.
Keywords: theorem ordered; ordered groups;