aleph number
Sign in to saveAlso known as ALEF SYMBOL, ℵ, aleph symbol, alef number
alef symbol (U+2135) or aleph, written left-to-right as the mathemical symbol ‹ℵ› for the first transfinite cardinal (countable); ordered sequence of transfinite numbers used to represent the cardinality (or size) of infinite countable sets
In the Vinony graph
Vinony's link graph records 403 inbound references to aleph number, and connects out to semantic theory of truth, natural number and mathematical logic.
Vinony files it under Cardinal numbers, Hebrew alphabet and Infinity.
Vinony links it to 33 Wikipedia language editions.
Wikidata facts
- Subclass of
- transfinite number
- Named after
- aleph
- Image
- U+2135.svg
Show 9 more facts
- maintained by WikiProject
- WikiProject Mathematics
- Commons category
- ℵ
- Unicode code point
- 2135
- HTML entity
- ℵ
- Unicode block
- Letterlike Symbols
- Unicode character name
- ALEF SYMBOL
- different from
- א
- studied by
- axiomatic set theory
- Unicode character
- ℵ
Sources (3)
via Wikidata · CC0
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Encyclopedic overview
Aleph-nought, aleph-zero, or aleph-null, the smallest infinite cardinal number
In mathematics, particularly in set theory, the aleph numbers are a sequence of numbers used to represent the cardinality (or size) of infinite sets. They were introduced by the mathematician Georg Cantor and are named after the symbol he used to denote them, the Hebrew letter aleph (ℵ).
Excerpted from Wikipedia’s “aleph number” article, available under the CC BY-SA 4.0 licence.