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≡
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| Identical to |
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| Punctuation |
| apostrophe |
( ’ ' ) |
| brackets |
( [ ], ( ), { }, ⟨ ⟩ ) |
| colon |
( : ) |
| comma |
( , ، 、 ) |
| dash |
( ‒, –, —, ― ) |
| ellipsis |
( …, ..., . . . ) |
| exclamation mark |
( ! ) |
| full stop / period |
( . ) |
| hyphen |
( ‐ ) |
| hyphen-minus |
( - ) |
| question mark |
( ? ) |
| quotation marks |
( ‘ ’, “ ”, ' ', " " ) |
| semicolon |
( ; ) |
| slash / stroke / solidus |
( /, ⁄ ) |
| Word dividers |
| interpunct |
( · ) |
| space |
( ) ( ) ( ) |
| General typography |
| ampersand |
( & ) |
| asterisk |
( * ) |
| at sign |
( @ ) |
| backslash |
( \ ) |
| bullet |
( • ) |
| caret |
( ^ ) |
| dagger |
( †, ‡ ) |
| degree |
( ° ) |
| ditto mark |
( ″ ) |
| inverted exclamation mark |
( ¡ ) |
| inverted question mark |
( ¿ ) |
| number sign / pound / hash |
( # ) |
| numero sign |
( № ) |
| obelus |
( ÷ ) |
| ordinal indicator |
( º, ª ) |
| percent, per mil |
( %, ‰ ) |
| plus and minus |
( + − ) |
| basis point |
( ‱ ) |
| pilcrow |
( ¶ ) |
| prime |
( ′, ″, ‴ ) |
| section sign |
( § ) |
| tilde |
( ~ ) |
| underscore / understrike |
( _ ) |
| vertical bar / broken bar / pipe |
( ¦, | ) |
| Intellectual property |
| copyright symbol |
( © ) |
| registered trademark |
( ® ) |
| service mark |
( ℠ ) |
| sound recording copyright |
( ℗ ) |
| trademark |
( ™ ) |
| Currency |
| currency (generic) |
( ¤ ) |
| currency (specific) |
| ( ₳ ฿ ₵ ¢ ₡ ₢ ₠ $ ₫ ৳ ₯ € ƒ ₣ ₲ ₴ ₭ ₺ ℳ ₥ ₦ ₧ ₱ ₰ £ ₹ ₨ ₪ ₸ ₮ ₩ ¥ ៛ ) |
| Uncommon typography |
| asterism |
( ⁂ ) |
| hedera |
( ❧ ) |
| index / fist |
( ☞ ) |
| interrobang |
( ‽ ) |
| irony punctuation |
( ؟ ) |
| lozenge |
( ◊ ) |
| reference mark |
( ※ ) |
| tie |
( ⁀ ) |
| Related |
| diacritical marks |
| logic symbols |
| whitespace characters |
| non-English quotation style |
( « », „ ” ) |
| In other scripts |
| Chinese punctuation |
| Hebrew punctuation |
| Japanese punctuation |
| Korean punctuation |
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This article is about the symbol. For the horse jump, see
Oxer.
The triple bar, ≡, is a symbol with multiple, context-dependent meanings. It has the appearance of a "=" sign with a third line.
In logic, it has a similar meaning to the if and only if connective, ⇔. However, in some texts ⇔ is used as a symbol in logic formulas, while ≡ is for reasoning about those formulas (as in metalogic).
In mathematics it sometimes used a symbol for congruence (although not the only one). Particularly, in number theory, it has the meaning of modular congruence: 
if N divides a − b.
This symbol is also used when it appears in an equation which is a definition of its left-hand side, that is an equation which is not derived but instead defined.
It is also used for "identical equality" of functions; one writes 
for two functions f, g if we have 
for all x.
In chemistry, the triple bar can be used to represent a triple bond between atoms. For example, HC≡CH is a common shorthand for acetylene.
The triple bar character in Unicode as codepoint U+2261 ≡ identical to (HTML: ≡ ≡). LaTeX \equiv corresponds to the triple bar.
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if N divides a − b.
for two functions f, g if we have 
for all x.
