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Blackboard bold. Blackboard bold is a style of writing bold symbols on a blackboard by doubling certain strokes, commonly used in mathematical lectures, and the derived style of typeface used in printed mathematical texts. The style is most commonly used to represent the number sets ( natural numbers ), ( integers ), ( rational numbers ...
Since then, blackboard bold has gradually gained currency, and is now commonly used in mathematical printing to denote certain common objects in a style distinct from other uses of bold letters. Today, either blackboard bold or ordinary bold letters can be used interchangeably to represent the standard number systems (,,,,,) and for certain ...
Use boldface in the remainder of the article only in a few special cases: After following a redirect: Terms which redirect to an article or section are commonly bolded when they appear in the first couple of paragraphs of the lead section, or at the beginning of another section (for example, subtopics treated in their own sections or alternative names for the main topic – see § Article ...
Uses. Reusable writing surface on which text or drawings are made. A blackboard or a chalkboard is a reusable writing surface on which text or drawings are made with sticks of calcium sulphate or calcium carbonate, known, when used for this purpose, as chalk. Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.
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 ...
History of sentence spacing. The history of sentence spacing is the evolution of sentence spacing conventions from the introduction of movable type in Europe by Johannes Gutenberg to the present day. Typesetting in all European languages enjoys a long tradition of using spaces of varying widths for the express purpose of enhancing readability.
The term "Insular script" is used to refer to a diverse family of scripts used for different functions. At the top of the hierarchy was the Insular half-uncial (or "Insular majuscule "), used for important documents and sacred text. The full uncial, in a version called "English uncial", was used in some English centres.
Capitalization. Capitalization ( American English) or capitalisation ( British English) is writing a word with its first letter as a capital letter (uppercase letter) and the remaining letters in lower case, in writing systems with a case distinction. The term also may refer to the choice of the casing applied to text.