U+2241 Not Tilde
U+2241 was added in Unicode version 1.1 in 1993. It belongs to the block
This character is a Math Symbol and is commonly used, that is, in no specific script.
The glyph is a canonical composition of the glyphs
The Wikipedia has the following information about this codepoint:
In mathematics, two sequences of numbers, often experimental data, are proportional or directly proportional if their corresponding elements have a constant ratio. The ratio is called coefficient of proportionality (or proportionality constant) and its reciprocal is known as constant of normalization (or normalizing constant). Two sequences are inversely proportional if corresponding elements have a constant product, also called the coefficient of proportionality.
This definition is commonly extended to related varying quantities, which are often called variables. This meaning of variable is not the common meaning of the term in mathematics (see variable (mathematics)); these two different concepts share the same name for historical reasons.
Two functions $f\left(x\right)$ and $g\left(x\right)$ are proportional if their ratio $\frac{f\left(x\right)}{g\left(x\right)}$ is a constant function.
If several pairs of variables share the same direct proportionality constant, the equation expressing the equality of these ratios is called a proportion, e.g., a/b = x/y = ⋯ = k (for details see Ratio). Proportionality is closely related to linearity.
Representations
System  Representation 

Nº  8769 
UTF8  E2 89 81 
UTF16  22 41 
UTF32  00 00 22 41 
URLQuoted  %E2%89%81 
HTML hex reference  ≁ 
Wrong windows1252 Mojibake  â‰ 
HTML named entity  ≁ 
HTML named entity  ≁ 
L^{A}T_{E}X  \not\sim 
Elsewhere
Complete Record
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1.1 (1993)  
NOT TILDE  
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Mathematical Operators  
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