<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Peregrin, Jaroslav</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Odkud se berou axiomy logiky? </style></title><secondary-title><style face="normal" font="default" size="100%">Organon F</style></secondary-title><translated-title><style face="normal" font="default" size="100%">Where Do the Axioms of Logic Come from?</style></translated-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Axioms</style></keyword><keyword><style  face="normal" font="default" size="100%">logic</style></keyword><keyword><style  face="normal" font="default" size="100%">Natural Deduction</style></keyword><keyword><style  face="normal" font="default" size="100%">negation</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2013</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.klemens.sav.sk/fiusav/doc/organon/prilohy/2013/2/117-139.pdf</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">2</style></number><volume><style face="normal" font="default" size="100%">20</style></volume><pages><style face="normal" font="default" size="100%">117-139</style></pages><language><style face="normal" font="default" size="100%">Czech</style></language><abstract><style face="normal" font="default" size="100%">Systems of axioms for elementary logic we can find in textbooks are usually not very transparent; and the reader might well wonder how did precisely such a set of axioms come into being. In this paper we present a way of constituting one such non-transparent set of axioms, namely the one presented by E. Mendelson in his &lt;i&gt;Introduction to Mathematical Logic&lt;/i&gt;, in a transparent way, with the aim of helping the reader to get an insight into the workings of the axioms.</style></abstract><custom3><style face="normal" font="default" size="100%">117139</style></custom3><custom5><style face="normal" font="default" size="100%">1</style></custom5></record></records></xml>