Home U+2100 to U+214F Letterlike Symbols
Glyph for U+2135
Source: Noto Sans

U+2135 Alef Symbol

U+2135 was added to Unicode in version 1.1 (1993). It belongs to the block U+2100 to U+214F Letterlike Symbols in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Other Letter and is commonly used, that is, in no specific script. The character is also known as first transfinite cardinal (countable).

The glyph is a Compat composition of the glyph Glyph for U+05D0 Hebrew Letter Alef. It has a Neutral East Asian Width. In bidirectional context it acts as Left To Right and is not mirrored. The glyph can, under circumstances, be confused with 1 other glyphs. In text U+2135 behaves as Alphabetic regarding line breaks. It has type Other Letter for sentence and Alphabetic Letter for word breaks. The Grapheme Cluster Break is Any.

The Wikipedia has the following information about this codepoint:

In mathematics, particularly in set theory, the aleph numbers are a sequence of numbers used to represent the cardinality (or size) of infinite sets that can be well-ordered. They were introduced by the mathematician Georg Cantor and are named after the symbol he used to denote them, the Hebrew letter aleph ( ℵ {displaystyle ,aleph ,} ).

The cardinality of the natural numbers is ℵ 0 {displaystyle ,aleph _{0},} (read aleph-nought or aleph-zero; the term aleph-null is also sometimes used), the next larger cardinality of a well-orderable set is aleph-one ℵ 1 , {displaystyle ,aleph _{1};,} then ℵ 2 {displaystyle ,aleph _{2},} and so on. Continuing in this manner, it is possible to define a cardinal number ℵ α {displaystyle ,aleph _{alpha },} for every ordinal number α , {displaystyle ,alpha ;,} as described below.

The concept and notation are due to Georg Cantor, who defined the notion of cardinality and realized that infinite sets can have different cardinalities.

The aleph numbers differ from the infinity ( ∞ {displaystyle ,infty ,} ) commonly found in algebra and calculus, in that the alephs measure the sizes of sets, while infinity is commonly defined either as an extreme limit of the real number line (applied to a function or sequence that "diverges to infinity" or "increases without bound"), or as an extreme point of the extended real number line.


System Representation
UTF-8 E2 84 B5
UTF-16 21 35
UTF-32 00 00 21 35
URL-Quoted %E2%84%B5
HTML-Escape ℵ
Wrong windows-1252 Mojibake ℵ
HTML-Escape ℵ
HTML-Escape ℵ
alias first transfinite cardinal (countable)
LATEX \aleph
Adobe Glyph List aleph

Related Characters



Complete Record

Property Value
Age 1.1 (1993)
Unicode Name ALEF SYMBOL
Block Letterlike Symbols
General Category Other Letter
Script Common
Bidirectional Category Left To Right
Combining Class Not Reordered
Decomposition Type Compat
Decomposition Mapping Glyph for U+05D0 Hebrew Letter Alef
Simple Lowercase Mapping Glyph for U+2135 Alef Symbol
Lowercase Mapping Glyph for U+2135 Alef Symbol
Simple Uppercase Mapping Glyph for U+2135 Alef Symbol
Uppercase Mapping Glyph for U+2135 Alef Symbol
Simple Titlecase Mapping Glyph for U+2135 Alef Symbol
Titlecase Mapping Glyph for U+2135 Alef Symbol
Case Folding Glyph for U+2135 Alef Symbol
ASCII Hex Digit
Bidi Control
Bidi Mirrored
Composition Exclusion
Case Ignorable
Changes When Casefolded
Changes When Casemapped
Changes When NFKC Casefolded
Changes When Lowercased
Changes When Titlecased
Changes When Uppercased
Full Composition Exclusion
Default Ignorable Code Point
Emoji Modifier Base
Emoji Component
Emoji Modifier
Emoji Presentation
Extended Pictographic
FC NFKC Closure Glyph for U+2135 Alef Symbol
Grapheme Cluster Break Any
Grapheme Base
Grapheme Extend
Grapheme Link
Hex Digit
ID Continue
ID Start
IDS Binary Operator
IDS Trinary Operator and
Indic Mantra Category
Indic Positional Category NA
Indic Syllabic Category Other
Jamo Short Name
Join Control
Logical Order Exception
Noncharacter Code Point
NFC Quick Check Yes
NFD Quick Check Yes
NFKC Casefold Glyph for U+05D0 Hebrew Letter Alef
NFKC Quick Check No
NFKD Quick Check No
Other Alphabetic
Other Default Ignorable Code Point
Other Grapheme Extend
Other ID Continue
Other ID Start
Other Lowercase
Other Math
Other Uppercase
Prepended Concatenation Mark
Pattern Syntax
Pattern White Space
Quotation Mark
Regional Indicator
Sentence Break Other Letter
Soft Dotted
Sentence Terminal
Terminal Punctuation
Unified Ideograph
Variation Selector
Word Break Alphabetic Letter
White Space
XID Continue
XID Start
Expands On NFC
Expands On NFD
Expands On NFKC
Expands On NFKD
Bidi Paired Bracket Glyph for U+2135 Alef Symbol
Bidi Paired Bracket Type None
East Asian Width Neutral
Hangul Syllable Type Not Applicable
ISO 10646 Comment
Joining Group No_Joining_Group
Joining Type Non Joining
Line Break Alphabetic
Numeric Type None
Numeric Value not a number
Simple Case Folding Glyph for U+2135 Alef Symbol
Script Extension
Vertical Orientation U