The logarithmic Brunn-Minkowski conjecture for origin-symmetric convex bodies

Let K,LKe(Rn)K,L\in\mathcal{K}_e(\mathbb{R}^n) be origin-symmetric convex bodies containing the origin in their interiors, and let KtL1tK^tL^{1-t} denote their logarithmic combination, defined as the Wulff shape of hKthL1th_K^th_L^{1-t}, where hKh_K and hLh_L are the support functions. For t[0,1]t\in[0,1], The logarithmic Brunn-Minkowski conjecture.

vol(KtL1t)vol(K)tvol(L)1t.\operatorname{vol}(K^tL^{1-t})\geq \operatorname{vol}(K)^t\operatorname{vol}(L)^{1-t}.

This is the logarithmic analogue of the Brunn-Minkowski inequality and is known in dimension two, for bodies sufficiently close to the unit q\ell^q-ball when q2q\geq 2, and under certain reflection symmetries. The general case remains open.

Sources & referencesView supporting material

Primary source

Luca Iffland, “The local logarithmic Brunn-Minkowski inequality for bodies of revolution”, arXiv:2602.17912 (2026).

Additional references

3 papers in this index state this conjecture (2014–2026). The statement above is taken from the most recent of them; the others are arXiv:2101.02549, arXiv:1409.4346.

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