When a candidate model for data is nonidentifiable, conventional wisdom dictates that the model must be simplified somehow, in order to gain identifiability. We explore two scenarios involving mismeasured variables where in fact model expansion, as opposed to model contraction, might be used to obtain an identifiable model. We compare the merits of model contraction and model expansion. We also...

The aim of this article is to simplify Pfanzagl’s proof of consistency for asymptotic maximum likelihood estimators, and to extend it to more general asymptotic M -estimators. The method relies on the existence of a sort of contraction of the parameter space which admits the true parameter as a fixed point. The proofs are short and elementary.

The aim of this article is to simplify Pfanzagl’s proof of consistency for asymptotic maximum likelihood estimators, and to extend it to more general asymptotic M -estimators. The method relies on the existence of a sort of contraction of the parameter space which admits the true parameter as a fixed point. The proofs are short and elementary.

The aim of this article is to simplify Pfanzagl’s proof of consistency for asymptotic maximum likelihood estimators, and to extend it to more general asymptotic M -estimators. The method relies on the existence of a sort of contraction of the parameter space which admits the true parameter as a fixed point. The proofs are short and elementary.

For a family of graphs G, the G-Contraction problem takes as an input graph G and integer k, goal is to decide if there exists subset F⊆E(G) size at most k such that G/F in G. Here, obtained from by contracting all edges F. In this article, we initiate study Grid Contraction parameterized complexity point view. We present fixed parameter tractable algorithm, running time 2O(k)⋅|V(G)|O(1), for p...

Murthy, K. S., J. R. Grider, J. F. Kuemmerle, and G. M. Makhlouf. Sustained muscle contraction induced by agonists, growth factors, and Ca mediated by distinct PKC isozymes. Am J Physiol Gastrointest Liver Physiol 279: G201–G210, 2000.—The role of protein kinase C (PKC) in sustained contraction was examined in intestinal circular and longitudinal muscle cells. Initial contraction induced by ago...

In this paper, the notion of cyclic $varphi$-contraction in fuzzymetric spaces is introduced and a fixed point theorem for this typeof mapping is established. Meantime, an example is provided toillustrate this theorem. The main result shows that a self-mappingon a G-complete fuzzy metric space has a unique fixed point if itsatisfies the cyclic $varphi$-contraction. Afterwards, some results inco...