U+212D BlackLetter Capital C
U+212D was added in Unicode version 1.1 in 1993. It belongs to the block
This character is a Uppercase Letter and is commonly used, that is, in no specific script.
The glyph is a font version of the glyph
The Wikipedia has the following information about this codepoint:
In set theory, the cardinality of the continuum is the cardinality or "size" of the set of real numbers $R$, sometimes called the continuum. It is an infinite cardinal number and is denoted by $c$ (lowercase Fraktur "c") or $R$.
The real numbers $R$ are more numerous than the natural numbers $N$. Moreover, $R$ has the same number of elements as the power set of $N.$ Symbolically, if the cardinality of $N$ is denoted as ${\aleph}_{0}$, the cardinality of the continuum is
This was proven by Georg Cantor in his uncountability proof of 1874, part of his groundbreaking study of different infinities. The inequality was later stated more simply in his diagonal argument in 1891. Cantor defined cardinality in terms of bijective functions: two sets have the same cardinality if, and only if, there exists a bijective function between them.
Between any two real numbers a < b, no matter how close they are to each other, there are always infinitely many other real numbers, and Cantor showed that they are as many as those contained in the whole set of real numbers. In other words, the open interval (a,b) is equinumerous with $R.$ This is also true for several other infinite sets, such as any ndimensional Euclidean space ${R}^{n}$ (see space filling curve). That is,
The smallest infinite cardinal number is ${\aleph}_{0}$ (alephnull). The second smallest is ${\aleph}_{1}$ (alephone). The continuum hypothesis, which asserts that there are no sets whose cardinality is strictly between ${\aleph}_{0}$ and $c$, means that $c={\aleph}_{1}$. The truth or falsity of this hypothesis is undecidable and cannot be proven within the widely used Zermelo–Fraenkel set theory with axiom of choice (ZFC).
Representations
System  Representation 

Nº  8493 
UTF8  E2 84 AD 
UTF16  21 2D 
UTF32  00 00 21 2D 
URLQuoted  %E2%84%AD 
HTML hex reference  ℭ 
Wrong windows1252 Mojibake  â„ 
HTML named entity  ℭ 
HTML named entity  ℭ 
L^{A}T_{E}X  \mathfrak{C} 
Related Characters
Confusables
Elsewhere
Complete Record
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1.1 (1993)  
BLACKLETTER CAPITAL C  
BLACKLETTER C  
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