Let $\mathscr{H}$ be a simplicial function space on a metric compact space $X$. Then the Choquet boundary $ChX$ of $\mathscr{H}$ is an $F_{\sigma }$-set if and only if given any bounded Baire-one function $f$ on $ChX$ there is an $\mathscr{H}$-affine bounded Baire-one function $h$ on $X$ such that $h=f$ on $ChX$. This theorem yields an answer to a problem of F. Jellett from [8] in the case of a metrizable set $X$.

Given a normalized Orlicz function M we provide an easy formula for a distribution such that, if X is a random variable distributed accordingly and X₁,...,Xₙ are independent copies of X, then $1/C_p{\left|\right|x\left|\right|}_M\le \left|\right|\left(x_i{X}_i\right){ⁿ}_{i=1}{\left|\right|}_p\le C_p{\left|\right|x\left|\right|}_M$, where $C_p$ is a positive constant depending only on p. In case p = 2 we need the function t ↦ tM’(t) - M(t) to be 2-concave and as an application immediately obtain an embedding of the corresponding Orlicz spaces into L₁[0,1]. We also provide a general result replacing the ${\ell }_p$-norm by an arbitrary N-norm. This...

Let $G$ be an Archimedean $\ell$-group. We denote by $G^d$ and $R_D\left(G\right)$ the divisible hull of $G$ and the distributive radical of $G$, respectively. In the present note we prove the relation ${\left(R_D\left(G\right)\right)}^d=R_D\left(G^d\right)$. As an application, we show that if $G$ is Archimedean, then it is completely distributive if and only if it can be regularly embedded into a completely distributive vector lattice.

A uni-nullnorm is a special case of 2-uninorms obtained by letting a uninorm and a nullnorm share the same underlying t-conorm. This paper is mainly devoted to solving the distributivity equation between uni-nullnorms with continuous Archimedean underlying t-norms and t-conorms and some binary operators, such as, continuous t-norms, continuous t-conorms, uninorms, and nullnorms. The new results differ from the previous ones about the distributivity in the class of 2-uninorms, which have not yet...

We establish an inversion formula for the M. M. Djrbashian A. H. Karapetyan integral transform (cf. [6]) on the Siegel domain ${\Omega }_n=\zeta \in {ℂ}^n:\varrho \left(\zeta \right)>0$, $\varrho \left(\zeta \right)=Im\left({\zeta }_1\right)-{\left|{\zeta }^{\text{'}}\right|}^2$. We build a family of Kähler metrics of constant holomorphic curvature whose potentials are the ${\varrho }^{\alpha }$-Bergman kernels, α > -1, (in the sense of Z. Pasternak-Winiarski [20] of ${\Omega }_n$. We build an anti-holomorphic embedding of ${\Omega }_n$ in the complex projective Hilbert space $ℂ\mathbb{P}\left(H_{\alpha }^2\left({\Omega }_n\right)\right)$ and study (in connection with work by A. Odzijewicz [18] the corresponding transition probability amplitudes....

Motivated by recent developments on calculus in metric measure spaces $(X,\mathrm{d},\mathrm{m})$, we prove a general duality principle between Fuglede’s notion [15] of $p$-modulus for families of finite Borel measures in $(X,\mathrm{d})$ and probability measures with barycenter in $L^q(X,\mathrm{m})$, with $q$ dual exponent of $p\in (1,\infty )$. We apply this general duality principle to study null sets for families of parametric and non-parametric curves in $X$. In the final part of the paper we provide a new proof, independent of optimal transportation, of the equivalence...