EuDML | Browse

Items

All a b c d e f g h i j k l m n o p q r s t u v w x y z Other

Previous Page 93 Next

Displaying 1841 – 1860 of 3839

Nearly prime subsemigroups of ßN.

N. Hindman, D. Strauss (1995)

Semigroup forum

Near-rings of continuous functions on compact abelian groups.

W. Mutter (1993)

Semigroup forum

Necessary and sufficient conditions for hypoelliptic of certain left invariant operators on nilpotent Lie groups II.

Lawrence Corwin (1984)

Journal für die reine und angewandte Mathematik

Neighborhood base at the identity of free paratopological groups

Ali Sayed Elfard (2013)

Topological Algebra and its Applications

In 1985, V. G. Pestov described a neighborhood base at the identity of free topological groups on a Tychonoff space in terms of the elements of the fine uniformity on the Tychonoff space. In this paper, we extend Postev’s description to the free paratopological groups where we introduce a neighborhood base at the identity of free paratopological groups on any topological space in terms of the elements of the fine quasiuniformity on the space.

Neighborhoods of the identity of the free abelian topological groups

Donald Marxen (1976)

Mathematica Slovaca

Network character and tightness of the compact-open topology

Richard N. Ball, Anthony W. Hager (2006)

Commentationes Mathematicae Universitatis Carolinae

For Tychonoff $X$ and $α$ an infinite cardinal, let $α def X : =$ the minimum number of $α$ cozero-sets of the Čech-Stone compactification which intersect to $X$ (generalizing $ℝ$ -defect), and let $rt X : = {min}_{α} max (α, α def X)$ . Give $C (X)$ the compact-open topology. It is shown that $τ C (X) \leq n χ C (X) \leq rt X = max (L (X), L (X) def X)$ , where: $τ$ is tightness; $n χ$ is the network character; $L (X)$ is the Lindel"of number. For example, it follows that, for $X$ Čech-complete, $τ C (X) = L (X)$ . The (apparently new) cardinal functions $n χ C$ and $rt$ are compared with several others.

New closure conditions and some problems in loop theory.

A.M. Shelekhov (1991)

Aequationes mathematicae

New models for the action of Hecke operators in spaces of Maass wave forms

Ian Kiming (2007)

Annales de l’institut Fourier

Utilizing the theory of the Poisson transform, we develop some new concrete models for the Hecke theory in a space $M_{λ} (N)$ of Maass forms with eigenvalue $1 / 4 - λ^{2}$ on a congruence subgroup $Γ_{1} (N)$ . We introduce the field $F_{λ} = ℚ (λ, \sqrt{n}, n^{λ / 2} ∣ n \in ℕ)$ so that $F_{λ}$ consists entirely of algebraic numbers if $λ = 0$ .The main result of the paper is the following. For a packet $Φ = (ν_{p} ∣ p ∤ N)$ of Hecke eigenvalues occurring in $M_{λ} (N)$ we then have that either every $ν_{p}$ is algebraic over $F_{λ}$ , or else $Φ$ will – for some $m \in ℕ$ – occur in the first cohomology of a certain space $W_{λ, m}$ which is a...