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This usage probably developed as a typed alternative to the libra symbol used for the same purpose in written mathematics, which is an equal sign with the upper bar replaced by a bar with an upward hump, bump, or loop in the middle (︍︍♎︎) or, sometimes, a tilde (≃). [citation needed] The symbol "≈" is also used for this purpose.
Typographical symbols and punctuation marks are marks and symbols used in typography with a variety of purposes such as to help with legibility and accessibility, or to identify special cases. This list gives those most commonly encountered with Latin script. For a far more comprehensive list of symbols and signs, see List of Unicode characters.
An approximate model is used to make calculations easier. Approximations might also be used if incomplete information prevents use of exact representations. The type of approximation used depends on the available information , the degree of accuracy required , the sensitivity of the problem to this data, and the savings (usually in time and ...
U+002B + PLUS SIGN – various symbols with strokes extending to left, up, right and down. U+002D - HYPHEN-MINUS – probably an ASCII character the most used for approximations. A conventional representation of hyphen , an approximation of dash (especially as -- and --- ), minus sign − and line drawing horizontal line ─ (see the image).
An approximate or range conversion is acceptable if the exact historical value is uncertain (e.g. stadion). Metric units not part of the SI or accepted for use with it should either be replaced with SI or SI-accepted units (e.g. joules instead of ergs ), or they should be treated as obscure units in the same way as furlongs.
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.
Estimated sign specification. The estimated sign, ℮, also referred to as the e-mark or estimated quantity (French: quantité estimée) can be found on most prepackaged products in the European Union (EU).