Zobrazeno 1 - 10
of 3 890
pro vyhledávání: '"Base (group theory)"'
Autor:
Timothy C. Burness, Aner Shalev
Publikováno v:
Journal of Algebra. 607:160-185
Fix a positive integer $d$ and let $\Gamma_d$ be the class of finite groups without sections isomorphic to the alternating group $A_d$. The groups in $\Gamma_d$ were studied by Babai, Cameron and P\'{a}lfy in the 1980s and they determined bounds on t
Autor:
Nick Gill, Bianca Lodá
Publikováno v:
Journal of Algebra. 607:286-299
We study the natural action of S n on the set of k-subsets of the set { 1 , … , n } when 1 ≤ k ≤ n 2 . For this action we calculate the maximum size of a minimal base, the height and the maximum length of an irredundant base. Here a base is a s
Autor:
Aleksandr V. Pukhlikov
Publikováno v:
Izvestiya: Mathematics. 86:334-411
In this paper we prove the birational superrigidity of Fano-Mori fibre spaces $\pi\colon V\to S$, every fibre of which is a complete intersection of type $d_1\cdot d_2$ in the projective space ${\mathbb P}^{d_1+d_2}$, satisfying certain conditions of
Autor:
Zemer Kosloff, Alexandre I. Danilenko
Publikováno v:
Proceedings of the American Mathematical Society. 150:1541-1557
Given an infinite countable discrete amenable group Γ \Gamma , we construct explicitly sharply weak mixing nonsingular Poisson Γ \Gamma -actions of each Krieger’s type: I I I λ III_\lambda , for λ ∈ [ 0 , 1 ] \lambda \in [0,1] , and I I ∞ I
Publikováno v:
Journal of Prosthodontic Research. 66:68-74
PURPOSE To measure the accuracy of the additively manufactured casts with 3 base designs: solid, honeycomb-structure, and hollowed bases. METHODS A virtual cast was used to create different base designs: solid (S Group), honeycomb-structure (HC group
Autor:
Ziqin Feng
Publikováno v:
Proceedings of the American Mathematical Society. 150:877-889
A topological space $X$ is defined to have a neighborhood $P$-base at any $x\in X$ from some poset $P$ if there exists a neighborhood base $(U_p[x])_{p\in P}$ at $x$ such that $U_p[x]\subseteq U_{p'}[x]$ for all $p\geq p'$ in $P$. We prove that a com
Publikováno v:
IEEE Transactions on Electron Devices. 68:6286-6291
A novel LDMOS featuring bulk full gate (BFG) with bulk channel and electron accumulation effect, named BFG-LDMOS, is proposed and investigated. The BFG includes bulk gate oxide (BGO) that is inserted in the ${N}$ -drift and the full gate (FG) that is
Autor:
Philippe Gille, Erhard Neher
Publikováno v:
Indagationes Mathematicae. 32:1290-1310
A fundamental result of Springer says that a quadratic form over a field of characteristic ≠ 2 is isotropic if it is so after an odd degree field extension. In this paper we generalize Springer’s theorem as follows. Let R be an arbitrary semiloca
Autor:
Walid Wannes
Publikováno v:
Bulletin of the Malaysian Mathematical Sciences Society. 45:623-629
Let $$g \geqslant 2$$ be an integer and $$S_g(n)$$ denote the sum of the digits in base g of the positive integer n. We obtain asymptotic formulas for the number of odd integers up to x that can be written as a product pq, with p, q both primes, sati
Autor:
Jonathan Schilhan
Publikováno v:
Archive for Mathematical Logic. 61:567-581
We study the definability of ultrafilter bases on $$\omega $$ in the sense of descriptive set theory. As a main result we show that there is no coanalytic base for a Ramsey ultrafilter, while in L we can construct $$\Pi ^1_1$$ P-point and Q-point bas