Summarized Dimensions Revisited

Communication Strategies Revisited: Looking beyond Interactional and Psycholinguistic Perspectives

Second language (L2) communication strategies (CSs) have traditionally been dealt with through either interactional or psychological perspectives. However, this paper is a critical attempt to question the status of the particular kinds of psycholinguistic and interactional approaches that currently dominate the field of second language acquisition (SLA). In this way, it expands the significance...

Cobordism of involutions revisited, revisited

Boardman’s work [3,4] on Conner and Floyd’s five-halves conjecture looks remarkably contemporary in retrospect. This note reexamines some of that work from a perspective proposed recently by Greenlees and Kriz. 1. Unoriented involutions A large part of Boardman’s argument can be summarized as a commutative diagram 0 // N geo Z/2Z∗ // ⊕i≥0Ni(BO∗−i) ∂ //

Personality and Culture Revisited: Linking Traits and Dimensions of Culture

The Self-dual Action of the Ashtekar Formalism Revisited

Different aspects of the self-dual (anti-self-dual) action of the Ashtekar canonical formalism are revisited. In particular, we study the equivalences and differences between the various versions of such an action. Our analysis may be useful for the development of Ashtekar formalism in eight dimensions. Pacs numbers: 04.60.-m, 04.65.+e, 11.15.-q, 11.30.Ly November, 2004 1 [email protected]

19 v 1 2 6 Se p 20 06 The causal hierarchy of spacetimes

The full causal ladder of spacetimes is constructed, and their updated main properties are developed. Old concepts and alternative definitions of each level of the ladder are revisited, with emphasis in minimum hypotheses. The implications of the recently solved " folk questions on smoothability " , and alternative proposals (as recent isocausality), are also summarized.