Results 81 to 90 of about 626 (221)
Groups where free subgroups are abundant
, 2011 Given an infinite topological group G and a cardinal κ>0, we say that G is almost κ-free if the set of κ-tuples (gi)i∈κ∈Gκ which freely generate free subgroups of G is dense in Gκ.
Mesyan, Zachary, Zachary Mesyan
core +1 more source
Interface‐Engineered Binary Framework Composites: Advancing Porous Materials for Precision Medicine
Advanced Materials Interfaces, EarlyView.Binary framework composites integrate two complementary porous architectures into a unified platform, enabling multifunctional design, enhanced structural tunability, and improved physicochemical performance. By combining high surface area, ordered porosity, interfacial synergy, and versatile functionalization, these hybrid materials offer new ...
Navid Rabiee +3 more
wiley +1 more source
Pro-$p$ groups of positive rank gradient and Hausdorff dimension
, 2019 Let $G$ be a finitely generated pro-$p$ group of positive rank gradient. Motivated by the study of Hausdorff dimension, we show that finitely generated closed subgroups $H$ of infinite index in $G$ never contain any infinite subgroups $K$ that are ...
Klopsch, Benjamin +5 more
core +1 more source
Advanced Materials Technologies, EarlyView.The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz +5 more
wiley +1 more source
On the outer automorphism groups of free groups
, 2014 We prove that the outer automorphism group of a free group of countably infinite rank is ...
Tolstykh, Vladimir
core +1 more source
Advanced Materials Technologies, EarlyView.Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu +8 more
wiley +1 more source
, 2012 In this thesis we consider in detail the following two fundamental problems for semigroup presentations: 1. Given a semigroup find a presentation defining it. 2. Given a presentation describe the semigroup defined by it.
Ruškuc, Nik
core
Sums of automorphisms of free modules and completely decomposable groups
, 2005 For certain groups and modules we discuss the property that every endomorphism of that group or module is a sum of two automorphisms. Firstly, we consider the general case of a free R-module, M, of countably infinite rank where R is an associative unital
C. Meehan, Meehan, C.
core +1 more source
Advanced Materials Technologies, EarlyView.Multi‐million cycle reliability for liquid metal stretchable electronics is achieved through a continuous cycle of mechanical testing, failure mode and mechanism analysis and implementing subsequent mitigation strategies. ABSTRACT Stretchable electronics that combine mechanical compliance with reliable electrical performance are essential for ...
Lennert Purnal +8 more
wiley +1 more source
Polygonal words in free groups
, 2010 [2000] Primary 20F36, 20F65 hyperbolic group, surface group Abstract. A longstanding question of Gromov asks whether every one-ended word-hyperbolic group contains a subgroup isomorphic to the fundamental group of a closed hyperbolic surface. An infinite
S.-H. Kim +3 more
core +1 more source