Strong Bergman asymptotics for vector-valued polynomial spaces

Let (K,w,v,\b5mu)(K,w,v,\b5mu) satisfy the weighted Bernstein Markov property. Let b1,,bNb_1,\dots,b_N be any orthonormal basis of Pr,nU\mathscr{P}_{r,n}U with respect to the product induced by (K,w,v,μ)(K,w,v,\mu). Define the vector measures

T(r)(ω):=KRe(ω,h=1N(bh,w(x),v)Ubh,w(x)Nvˉ)Udμ(x).T^{(r)}(\omega):=\int_K\operatorname{Re}\left(\omega,\frac{\sum_{h=1}^N\overline{(b_{h,w}(x),v)_U}b_{h,w}(x)}{N}\odot \bar v\right)_U\,d\mu(x).

Strong Bergman asymptotics. The measures satisfy

T(r)1s(2π)nl=1s(,ul)U(ddcVK,Ql)n,T^{(r)}\rightharpoonup^*\frac{1}{s(2\pi)^n}\sum_{l=1}^s(\mathord\cdot,u_l)_U\left(\operatorname*{dd^c}V_{K,Q_l}^*\right)^n,

where Ql=logwlQ_l=-\log w_l and (ddcVK,Q)n\left(\operatorname*{dd^c}V_{K,Q}^*\right)^n is the measure defined in the cited subsection. The same convergence is asserted when (K,v,μ)(K,v,\mu) is replaced by any Bernstein Markov sequence (K,v(r),μ(r))(K,v^{(r)},\mu^{(r)}). This conjecture proposes a vector-valued analogue of strong Bergman asymptotics, identifying the weak-* limit of normalized Bergman-type vector measures; its resolution status is not established by the supplied text.

Sources & referencesView supporting material

Primary source

Ludovico Bruni Bruno and Federico Piazzon, “A pluripotential theoretic framework for polynomial interpolation of vector-valued functions and differential forms”, arXiv:2504.06745 (2025).

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