Weighted quermassintegral conjecture for static convex domains

Let Ω \Omega be a static convex domain with smooth boundary in Hn+1 \mathbb H^{n+1}. For 0l<kn+10\leq l<k\leq n+1, define

hk(r)=Wkλ(Br)=ωnsinhn+1krcoshkr,h_k(r)=W_k^{\lambda'}(B_r)=\omega_n\sinh^{n+1-k}r\cosh^k r,

where BrB_r is the geodesic ball of radius rr, and let hl1h_l^{-1} denote the inverse of the monotone function hlh_l. The weighted curvature integrals are

W0λ(Ω)=Mudμ,Wkλ(Ω)=MλEk1dμ(1kn+1).W_{0}^{\lambda'}(\Omega)=\int_M u\,d\mu,\qquad W_k^{\lambda'}(\Omega)=\int_M\lambda' E_{k-1}\,d\mu\quad(1\leq k\leq n+1).

Weighted quermassintegral conjecture. One has

Wkλ(Ω)hkhl1(Wlλ(Ω)).W_k^{\lambda'}(\Omega)\geq h_k\circ h_l^{-1}\bigl(W_l^{\lambda'}(\Omega)\bigr).

Equality holds if and only if Ω\Omega is a geodesic ball centered at the origin. This would extend the known weighted isoperimetric and Alexandrov–Fenchel inequalities for static convex domains in hyperbolic space to all pairs 0l<kn+10\leq l<k\leq n+1.

Sources & referencesView supporting material

Primary source

Yingxiang Hu and Haizhong Li, “Geometric inequalities for static convex domains in hyperbolic space”, arXiv:2105.03911 (2021).

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