/Contents 9 0 R stream 13 0 obj << This is the amount of set theory that everyone with an interest in matters mathematical should know. The notion of set is taken as “undefined”, “primitive”, or “basic”, so we don’t try to define what a set is, … 1. >> It’s probably a good idea to look through the supplement at the start of the course, but completing many Any formal theory starts with the speci cation of its language. xڽYYo��~�_��� ���l^3@ /�A��l2J�B(�e1�CKRc+�>U]�K�lOf������ꮖ�_����,ֻE�U,�/���o�w���-W��9�������v�˥�����+x��m�U%�=Jڽ)�6�&9Q�˕t�K�d��| Iw}��2�N��DQ�T@�������������?ֿ��C4�u$/\B+�C� /Resources 1 0 R Intuitively, a set is a collection of all elements that satisfy a certain given property. This brief document summarizes what is required. >> stream /Resources 7 0 R /MediaBox [0 0 595.276 841.89] In other words, we might be tempted to postulate the following rule of formation for sets. %PDF-1.5 /Filter /FlateDecode 1 Elementary Set Theory Notation: fgenclose a set. JN��A�r�=? /ProcSet [ /PDF /Text ] f1;2;3g= f3;2;2;1;3gbecause a set is not de ned by order or multiplicity. Why Axiomatic Set Theory? ��w�P�Գ432SIS043�333W076�304WIQ����Ԍ
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