منابع مشابه
The probability of neural connexions
J In some areas of a nervous system there is no obvious plan of connexions. I f it is assumed, first, that in these areas fibre growth is random, and secondly, that connexions are formed if axon and dendrite approach within a critical distance, there are certain mathematical consequences. If fibre density is defined and measured in a particular way it is possible to derive a formula for the ave...
متن کاملAsymptotics for general connexions at infinity
This is a preliminary set of notes on the asymptotic behavior of the monodromy of connexions near a general point at∞ in the spaceMDR of connexions on a compact Riemann surface X. We will consider a path of connexions of the form (E,∇+ tθ) which approaches the boundary divisor transversally at the point on the boundary of MDR corresponding to a general Higgs bundle (E, θ). This is very similar ...
متن کاملConnexon connexions in the thalamocortical system.
Electrical synapses are composed of gap junction channels that interconnect neurons. They occur throughout the mammalian brain, although this has been appreciated only recently. Gap junction channels, which are made of proteins called connexins, allow ionic current and small organic molecules to pass directly between cells, usually with symmetrical ease. Here we review evidence that electrical ...
متن کاملConnexions sur les systèmes linéaires stabilisables
Résumé En utilisant des concepts et des techniques venant de la géométrie non-commutative, le but de ce papier est de montrer que tout système linéaire stabilisable de manière interne au sens de Desoer, Vidyasagar, Zames. . . peut être doté d’une structure de connexion de Grassmann/Levi-Civita. Similairement, tout contrôleur stabilisant admet une telle connexion. Nous explicitons cette construc...
متن کاملConnexions: An Alternative Approach to Publishing
Web technologies offer new methods for quickly sharing and disseminating knowledge. Digital libraries of scholarly assets are proliferating online, with materials being openly licensed and shared. Sharing knowledge provides learners, instructors and researchers with access to the most recent findings, encouraging more rapid breakthroughs that lead to positive impacts to society. These new publi...
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ژورنال
عنوان ژورنال: Transactions of the American Mathematical Society
سال: 1944
ISSN: 0002-9947
DOI: 10.1090/s0002-9947-1944-0010555-7