Things that can and things that cannot be done in PRA

Things That Can and Things That Cannot Be Done in PRA

Things that can and things that can ’ t be done in PRA Ulrich

Things that can and things that can’t be done in PRA

It is well-known by now that large parts of (non-constructive) mathematical reasoning can be carried out in systems T which are conservative over primitive recursive arithmetic PRA (and even much weaker systems). On the other hand there are principles S of elementary analysis (like the Bolzano-Weierstraß principle, the existence of a limit superior for bounded sequences etc.) which are known to...

Things that can be made into themselves

One says that a property P of sets of natural numbers can be made into itself iff there is a numbering α0, α1, . . . of all left-r.e. sets such that the index set {e : αe satisfies P} has the property P as well. For example, the property of being Martin-Löf random can be made into itself. Herein we characterize those singleton properties which can be made into themselves. A second direction of ...

Things That Can Be Changed in Early Intervention in Childhood.

INTRODUCTION Early intervention implies a model of support focused on a child, family and a broader community from early childhood. The aim of this study was to analyze the elements of the successful early intervention in childhood, as well as to assess the role of a special educator and rehabilitator and level of their involvement in implementing the program on the territory of Novi Sad. MAT...