READING: I §1 2
Back to reading:
I §1 1
begin quote ita"
CHAPTER I [:] Notions from Set Theory [...] §1. SETS AND ELEMENTS. SUBSETS. "end quote
These pages assume that the reader has the book and is reading along. topic index contents
Please read these notes from the beginning to here, and then paragraph 4 of §1.
ELEMENTS OF SETS
I think 'being in a set' - indicated by the symbol - is another concept that is somewhat more subtle that it appears. Because ...
begin quote ita-1-1-4-pg2 "
The symbol must also have other properties (which we don't specify here) that enable us, given certain sets, to construct others.
This is also something I missed on my first reading, although I recall various constructions, and I am looking forward very much to looking at those constructions again - keeping in mind the just quoted connection to the symbol .