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The symbol ≡ (
triple bar Triple is used in several contexts to mean "threefold" or a " treble": Sports * Triple (baseball), a three-base hit * A basketball three-point field goal * A figure skating jump with three rotations * In bowling terms, three strikes in a row * ...
) is used in science and mathematics with several different meanings. It may refer to the following:


Mathematics

*
Definition A definition is a statement of the meaning of a term (a word, phrase, or other set of symbols). Definitions can be classified into two large categories: intensional definitions (which try to give the sense of a term), and extensional definitio ...
: Identity of a variable and a mathematical expression because of the definition of the variable *
Logical biconditional In logic and mathematics, the logical biconditional, also known as material biconditional or equivalence or bidirectional implication or biimplication or bientailment, is the logical connective used to conjoin two statements P and Q to form th ...
, in logic (if and only if) *
Modular arithmetic In mathematics, modular arithmetic is a system of arithmetic operations for integers, other than the usual ones from elementary arithmetic, where numbers "wrap around" when reaching a certain value, called the modulus. The modern approach to mo ...
, a ≡ b (mod m) * General
equivalence relation In mathematics, an equivalence relation is a binary relation that is reflexive, symmetric, and transitive. The equipollence relation between line segments in geometry is a common example of an equivalence relation. A simpler example is equ ...
, often denoted using a triple bar


Chemistry

*
Triple bond A triple bond in chemistry is a chemical bond between two atoms involving six Electron pair bond, bonding electrons instead of the usual two in a covalent bond, covalent single bond. Triple bonds are stronger than the equivalent covalent bond, sin ...
, a type of covalent bond between two atoms


Computing

*
Hamburger button The hamburger button (), so named for its unintentional resemblance to a hamburger, is a Button (computing), button typically placed in a top corner of a graphical user interface. Its function is to toggle a menu (sometimes referred to as a hambu ...
, often used for drop-down menus * Symbol for the
line feed A newline (frequently called line ending, end of line (EOL), next line (NEL) or line break) is a control character or sequence of control characters in character encoding specifications such as ASCII, EBCDIC, Unicode, etc. This character, or ...
character in
ISO 2047 ISO 2047 (Information processing – Graphical representations for the control characters of the 7-bit coded character set) is a standard for graphical representation of the control characters for debugging purposes, such as may be found in t ...


See also

*
≅ An approximation is anything that is intentionally similar but not exactly equal to something else. Etymology and usage The word ''approximation'' is derived from Latin ''approximatus'', from ''proximus'' meaning ''very near'' and the prefix ' ...
, a symbol sometimes used to show an approximate value, :
≅ An approximation is anything that is intentionally similar but not exactly equal to something else. Etymology and usage The word ''approximation'' is derived from Latin ''approximatus'', from ''proximus'' meaning ''very near'' and the prefix ' ...
is also used to show geometric congruence * The eight
trigram Trigrams are a special case of the ''n''-gram, where ''n'' is 3. They are often used in natural language processing for performing statistical analysis of texts and in cryptography for control and use of ciphers and codes. See results of analysi ...
s of the
Bagua The ''bagua'' ( zh, c=八卦, p=bāguà, l=eight trigrams) is a set of symbols from China intended to illustrate the nature of reality as being composed of mutually opposing forces reinforcing one another. ''Bagua'' is a group of trigrams—co ...
: ☰, ☱, ☲, ☳, ☴, ☵, ☶, ☷ * Ξ, capital letter Xi of the
Greek alphabet The Greek alphabet has been used to write the Greek language since the late 9th or early 8th century BC. It was derived from the earlier Phoenician alphabet, and is the earliest known alphabetic script to systematically write vowels as wel ...
*
三 Chinese numerals are words and characters used to denote numbers in written Chinese. Today, speakers of Chinese languages use three written numeral systems: the system of Arabic numerals used worldwide, and two indigenous systems. The more famil ...
, Chinese numeral for the number 3 *
Glossary of mathematical symbols A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula ...
*
Tesla Model 3 The Tesla Model 3 is a Battery electric vehicle, battery electric powered Mid-size car, mid-size sedan with a fastback body style built by Tesla, Inc., introduced in 2017. The vehicle is marketed as being more affordable to more people than pr ...
, whose logo originally stylized the digit 3 as three horizontal bars *
III (disambiguation) III or iii may refer to: Companies * Information International, Inc., a computer technology company * Innovative Interfaces, Inc., a library-software company * 3i, formerly Investors in Industry, a British investment company Other uses * I ...
, three letter Is in a row {{disambiguation