Let 𝔤=𝔤0¯⊕𝔤1¯{{mathfrak{g}}={mathfrak{g}}_{bar{0}}oplus{mathfrak{g}}_{bar{1}}} be a basic classical Lie superalgebra over an algebraically closed field 𝐤{{mathbf{k}}} of characteristic p>2{p>2}. Denote by 𝒵{mathcal{Z}} the center of the universal enveloping algebra U(𝔤){U({mathfrak{g}})}. Then 𝒵{mathcal{Z}} turns out to be finitely-generated purely-even commutative algebra without nonzero divisors. In this paper, we demonstrate that the fraction Frac
In this paper, we study representations of non-finitely graded Lie algebras 𝒲(ϵ){mathcal{W}(epsilon)} related to Virasoro algebra, where ϵ=±1{epsilon=pm 1}. Precisely speaking, we completely classify the free 𝒰(𝔥){mathcal{U}(mathfrak{h})}-modules of rank one over 𝒲(ϵ){mathcal{W}(epsilon)}, and find that these module structures are rather different from those of other graded Lie algebras. We also determine the simplicity and isomorphism classes of these modules.
We start a systematic analysis of the first-order model theory of free lattices. Firstly, we prove that the free lattices of finite rank are not positively indistinguishable, as there is a positive