Definition:Strictly Smaller Set
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Let $S$ and $T$ be sets.
$S$ is defined as being strictly smaller than $T$ if and only if:
$S$ is strictly smaller than $T$ can be denoted:
- $S < T$
Also known as
If $S$ is strictly smaller than $T$, then $S$ is said to be of strictly lower cardinality than $T$.
- 2010: Raymond M. Smullyan and Melvin Fitting: Set Theory and the Continuum Problem (revised ed.) ... (previous) ... (next): Chapter $1$: General Background: $\S 4$ Larger and smaller