Editing Approximation (section)

====Unicode====
{{See also|Unicode mathematical operators}}

Approximate equalities denoted by wavy or dotted symbols.<ref>{{cite web| title =Mathematical Operators – Unicode| url =https://www.unicode.org/charts/PDF/U2200.pdf| access-date =2013-04-20}}</ref>
{{aligned table |cols=2|class=wikitable
| {{Unichar|223C|TILDE OPERATOR}} | Sometimes indicates [[proportionality (mathematics)|proportionality.]]
| {{Unichar|223D|REVERSED TILDE}} | Sometimes indicates proportionality.
| {{Unichar|2243|ASYMPTOTICALLY EQUAL TO}} | Combined "≈" and "{{=}}" representing [[Asymptotic analysis|asymptotic equality]].
| {{Unichar|2245|APPROXIMATELY EQUAL TO}} | Combined "≈" and "{{=}}" representing [[isomorphism]] or [[congruence relation|congruence]].
| {{unichar|2246|approximately but not actually equal to}} |
| {{unichar|2247|neither approximately nor actually equal to}} |
| {{Unichar|2248|ALMOST EQUAL TO}} |
| {{Unichar|2249|NOT ALMOST EQUAL TO}} |
| {{Unichar|224A|ALMOST EQUAL OR EQUAL TO}} | Combined "≈" and "{{=}}" representing equivalence or approximate equivalence.
| {{Unichar|2250|APPROACHES THE LIMIT}} | Represents a variable, like {{mvar|y}}, approaching a [[limit (mathematics)|limit]], for example, <math>\lim_{x \to \infty} y(x) \doteq 0</math>.<ref>{{cite book |title=D & D Standard Oil & Gas Abbreviator |year=2006 |publisher=PennWell 
 |url=https://books.google.com/books?id=7FPtZp8abSAC&dq=%22%E2%89%90%22+approach+limit&pg=PA366 |access-date=May 21, 2020 |quote=≐ approaches a limit |page=366|isbn=9781593701086 }}</ref>
| {{Unichar|2252|APPROXIMATELY EQUAL TO OR THE IMAGE OF}} | "<big>≈</big>" or "<big>≃</big>" equivalent in [[Japanese language|Japan]], [[Taiwanese Mandarin|Taiwan]], and [[Korean language|Korea]].
| {{Unichar|2253|IMAGE OF OR APPROXIMATELY EQUAL TO}} | Reversed variant of "≒" (U+2252).
| {{Unichar|225F|QUESTIONED EQUAL TO|nlink=≟}} |
| {{unichar|2A85|LESS-THAN OR APPROXIMATE}} |
| {{unichar|2A86|GREATER-THAN OR APPROXIMATE}} |
}}