# Euler Diagram/Examples

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## Examples of Euler Diagrams

The following examples show:

- $(\text a)$ The subset relation $T \subseteq S$
- $(\text b)$ Examples of disjoint sets $S \cap T = \O$
- $(\text c)$ The most general case: $S \cap T \ne \O$, $T \nsubseteq S$, $S \nsubseteq T$

The shape of the areas is irrelevant, but usually circles are used.

## Sources

- 1965: A.M. Arthurs:
*Probability Theory*... (previous) ... (next): Chapter $1$: Set Theory: $1.2$: Sets and subsets

- (where this is referred to as a Venn diagram)

- 1965: J.A. Green:
*Sets and Groups*... (previous) ... (next): $\S 1.2$.Subsets: Example $10$

- (where this is referred to as a Venn diagram)