In this paper we use Quillen’s model structure given by Dwyer-Kan for the category of simplicial groupoids (with discrete object of objects) to describe in this category, in the simplicial language, the fundamental homotopy theoretical constructions of path and cylinder objects. We then characterize the associated left and right homotopy relations in terms of simplicial identities and give a si...

A megamodel is a model, whose instances are systems of models and intermodel relationships. To be independent of a particular modeling language, typical megamodels reduce models and their relationships to unstructured nodes and edges, thus creating a significant gap between abstract megamodels and their concrete instances. We address this gap problem by mathematical means borrowed from category...

In this guest column, I wish to present some informal and personal recollections of the exciting early days of ADJ. This time was very important to me personally, and I think was also signiicant for the eld of algebraic speciication. Because these recollections are so personal, they are also necessarily biased, and probably inaccurate in some respects; but perhaps this will just make the result...

One major aspect of successful language acquisition is the ability to organize words into form class categories and generalize from properties of experienced items to novel items. Furthermore, learners must often determine how to use a new word, when there is very sparse information regarding its acceptable contexts. In this work we employ an artificial language learning paradigm to explore how...

In [4] the trace space of parallel non-looped, non-branching processes is given as a prod-simplicial complex derived from an index category. For looped processes, the state space is a torus and the trace space is a disjoint union of tracespaces of deloopings. The index category for the trace space of the deloopings is developed from the once delooped case. When just one process is looped, the i...

comparative literature is defined as an empiric disciplinewithin literary studies that focuses on the comparison between a literature andother literature(s) or other forms of human expression. nowadays, due to theclash between the two trends existing in the discipline -the historical and thetheoretical, comparative literature is immersed in a process of theoretical andpractical renewal that foc...

In this paper we use Quillen's model structure given by Dwyer-Kan for the category of simplicial groupoids (with discrete object of objects) to describe in this category, in the simplicial language, the fundamental homotopy theoretical constructions of path and cylinder objects. We then characterize the associated left and right homotopy relations in terms of simplicialidentities and give a sim...

The present study aimed to document the constraints and limits in applying reflective teaching principles in ELT settings in Iran from the teachers’ perspective along with solutions and coping strategies to help remove the obstacles. 60 teachers teaching general English at 6 language institutes were selected through convenience sampling. First, the teacher participants filled out a reflectivity...