A congruence relation θ on an algebra A is fully invariant if every endomorphism of A preserves θ. A congruence θ is verbal if there exists a variety V such that θ is the least congruence of A such that A/θ ∈ V. Every verbal congruence relation is known to be fully invariant. This paper investigates fully invariant congruence relations that are verbal, algebras whose fully invariant congruences...

The Madsen-Tillmann spectra defined by categories of threeand four-dimensional Spin manifolds have a very rich algebraic structure, whose surface is scratched here. For Michael Atiyah, in deep gratitude. 1. Cobordism categories 1.1 Many variations and generalizations are possible, but to begin, consider the topological two-category DCobord whose objects are oriented smooth closed d-manifolds (D...

Roberson and Davidoff (2000) found that color categorical perception (CP; better cross-category than within-category discrimination) was eliminated by verbal, but not by visual, interference presented during the interstimulus interval (ISI) of a discrimination task. On the basis of this finding, Roberson and Davidoff concluded that CP was mediated by verbal labels, and not by perceptual mechani...

When two objects carry the same category label, we tend to perceive that these objects are similar. When two objects carry different category labels, we perceive that these objects are dissimilar. How does this happen? In an attempt to clarify the effect of category labels on similarity judgments, pictures of animal tissues were presented with fictitious labels and participants judged the simil...

the paper aims at describing verbal tense system in the dialect of adkan, a village in khorasan-e shomali province in the northeast of iran. it seems that this dialect is one of the tati dialects in the area. since the main objective was to collect the oldest dialect, the data was gathered by interviewing some educated and uneducated old and middle-aged speakers. this study which is the first s...

Teachers’ verbal behavior is a key contributor to provision of appropriate indirect intervention in language learning contexts; however, it is surprising that professionals in ELT, to date, have not proposed a structured oral/verbal framework to deliver intervention and assistance in language learning contexts. To help redress this gap, Heron’s Six-Category Intervention Analysis was adapted to ...