论说一切有部“二谛”思想之变迁 (original) (raw)

On crossed product rings with twisted involutions, their module categories and L-theory

arXiv: K-Theory and Homology, 2007

We study the Farrell-Jones Conjecture with coefficients in an additive G-category with involution. This is a variant of the L-theoretic Farrell-Jones Conjecture which originally deals with group rings with the standard involution. We show that this formulation of the conjecture can be applied to crossed product rings R*G equipped with twisted involutions and automatically implies the a priori more general fibered version.

Characterizing Translations on Groups by Cosets of Their Subgroups

Communications in Algebra, 2012

On a group, constant functions and left translations by group elements map left cosets into left cosets for every subgroup. We determine classes of groups for which this property of preserving cosets characterizes constants and translations, e.g., finite non-abelian groups that are perfect, partitioned, primitive, or generated by elements of prime order p. For certain classes of groups we construct other coset-preserving functions, in particular, power endomorphisms and functions defined in terms of the subgroup lattice.

Recognizing Invisible Violence: A Thirty-Year Ethnographic Retrospective

As an anthropologist writing since 1979 about violence, poverty, and social inequality, first in Central America and then in the United States, I have worried about the danger of inadvertently contributing to a voyeurism or pornography of brutality that pathologizes the unworthy poor. I did not, however, seek out the topic of violence in my fieldwork sites. Violence imposed itself on me because it is central to the organization of power in everyday life and has been throughout history. There is a much bigger problem with the politics of representation, however, in anthropology, social medicine, and public health, and that is the failure to recognize the violence that generally overwhelms the people we study. Violence is spread unequally across the globe, and the ways it maintains exploitative power structures need to be docum ented and denounced. Unfortunately, although direct physical violence is easily visible, it is merely the tip of the iceberg. Often it distracts us from being able to see the less clearly visible forms of coercion, fear, and subjectification through which violence deceptively and perniciously morphs over time and through history. These deceptive forms of violence are largely invisible to or " mis-recognized " by both protagonists and victims—who are often one and the same. This misrecognition legitimizes to the general public the policies and institutions that politically impose suffering on the socially vulnerable.

Teoría de Conjuntos

Lic. Dennis A. Redtwitz

es el "padre" de la teoría de conjuntos. Fue la primera persona en estudiar los conjuntos como tales, y no sólo sus aplicaciones (funciones, etc.). Describió la palabra conjunto con las siguientes palabras: