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The multiplication sign ( × ), also known as the times sign or the dimension sign, is a mathematical symbol used to denote the operation of multiplication, which results in a product. [ 1] While similar to a lowercase X ( x ), the form is properly a four-fold rotationally symmetric saltire. [ 2]
Multiplication (often denoted by the cross symbol ×, by the mid-line dot operator ⋅, by juxtaposition, or, on computers, by an asterisk *) is one of the four elementary mathematical operations of arithmetic, with the other ones being addition, subtraction, and division. The result of a multiplication operation is called a product .
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 ...
middle dot(for multiplication) 1698 (perhaps deriving from a much earlier use of middle dot to separate juxtaposed numbers) division slash(a.k.a. solidus) 1718 (deriving from horizontal fraction bar, invented by Abu Bakr al-Hassarin the 12th century) Thomas Twining.
Any such symbol can be called a decimal mark, decimal marker, or decimal sign. Symbol-specific names are also used; decimal point and decimal comma refer to a dot (either baseline or middle ) and comma respectively, when it is used as a decimal separator; these are the usual terms used in English, [ 1 ] [ 2 ] [ 3 ] with the aforementioned ...
The New York Times Best Seller list is widely considered the preeminent list of best-selling books in the United States. Since October 12, 1931, The New York Times Book Review has published the list weekly. In the 21st century, it has evolved into multiple lists, grouped by genre and format, including fiction and nonfiction, hardcover, paperback and electronic. The list is based on a ...
Snellen chart. Purpose. Snellen chart is used to estimate visual acuity (last three rows are 20/15, 20/13 and 20/10) A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862 as a measurement tool for the acuity formula ...
The history of mathematical notation [1] includes the commencement, progress, and cultural diffusion of mathematical symbols and the conflict of the methods of notation confronted in a notation's move to popularity or inconspicuousness. Mathematical notation [2] comprises the symbols used to write mathematical equations and formulas.