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The triple bar or tribar, ≡, is a symbol with multiple meanings in mathematics, logic, science, and design. Learn how it is used in different contexts, such as congruence, modular arithmetic, botanical nomenclature, and hamburger icon.
Learn the meanings and uses of various mathematical symbols, such as + (plus sign), − (minus sign), × (multiplication sign), and more. See examples, syntax, and Unicode and LaTeX renderings of each symbol.
Learn the meaning and usage of various emoticons or textual portrayals of a writer's moods or facial expressions. Find out the difference between Western, Eastern and 2channel style emoticons, and how to type them on different platforms.
A fraction is a number that represents a part of a whole or a number of equal parts. The denominator is the number of parts in a whole, and the numerator is the number of parts in a fraction. Learn about different forms, operations and applications of fractions.
Learn about the origin, meaning and variations of the equals sign (=), the mathematical symbol for equality. Find out how it is used in different languages and contexts, such as definitions, conditional statements, assignments and comparisons.
Learn about the less-than sign (<), a mathematical symbol that denotes an inequality between two values. Find out how it is used in computing, HTML, Unicode, and other fields, and see different forms and meanings of the symbol.
At any instant of time, the net force on a body is equal to the body's acceleration multiplied by its mass or, equivalently, the rate at which the body's momentum is changing with time. If two bodies exert forces on each other, these forces have the same magnitude but opposite directions. [1] [2]
Learn about the definition, properties and applications of powers of two, which are numbers of the form 2n where n is an integer. Find out how powers of two relate to binary numerals, computer science, Mersenne primes, Fermat primes and Euclid's Elements.