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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. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...
The following table lists many specialized symbols commonly used in modern mathematics, ordered by their introduction date. The table can also be ordered alphabetically by clicking on the relevant header title.
In mathematics, the study of the circle has ... that is, not containing their boundaries, or as closed, ... The compass in this 13th-century manuscript is a symbol of ...
The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics. Additionally, the subsequent columns contains an informal explanation, a short example, the Unicode location, the name for use in HTML documents, [1] and the LaTeX symbol.
clockwise closed circle arrow: u+2941 ⥀: anticlockwise closed circle arrow: u+2940 〶 circled postal mark: u+3036 🎯: direct hit: u+1f3af ⨸: circled division sign: u+2a38 ⨷: multiplication sign in double circle: u+2a37 ♽ partially-recycled paper symbol: u+267d ♼ recycled paper symbol: u+267c ☯: yin yang: u+262f ☮: peace symbol ...
In mathematics, the Borromean rings [a] are three simple closed curves in three-dimensional space that are topologically linked and cannot be separated from each other, but that break apart into two unknotted and unlinked loops when any one of the three is cut or removed.
where C is the circumference of a circle, d is the diameter, and r is the radius. More generally, = where L and w are, respectively, the perimeter and the width of any curve of constant width. = where A is the area of a circle. More generally, =
In geometry, a disk (also spelled disc) [1] is the region in a plane bounded by a circle. A disk is said to be closed if it contains the circle that constitutes its boundary, and open if it does not. [2] For a radius, , an open disk is usually denoted as and a closed disk is ¯.