# Definition:Set Theory/Historical Note

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## Historical Note on Set Theory

Set theory arose from an attempt to comprehend the question: "What is a number?"

The main initial development of the subject was in fact not directly generated as a result of trying to answer this question, but as a result of Georg Cantor's work around $1870$ to understand the nature of infinite series and related subjects.

As a result of this he began to consider the nature of infinite collections of general object, not just numbers.

*Cantor ....is usually considered the founder of set theory as a mathematical discipline ...*- -- Patrick Suppes:
*Axiomatic Set Theory*(1960, 2nd ed. 1972)

- -- Patrick Suppes:

## Sources

- 1972: Patrick Suppes:
*Axiomatic Set Theory*(2nd ed.) ... (previous) ... (next): $\S 1.1$ Set Theory and the Foundations of Mathematics