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Obelus
An obelus (plural: obeluses or obeli) is a term in typography that refers to a historical mark which has resolved to three modern meanings: * Division sign * Dagger * Commercial minus sign (limited geographical area of use) The word "obelus" comes from (obelós), the Ancient Greek word for a sharpened stick, spit, or pointed pillar. This is the same root as that of the word 'obelisk'. In mathematics, the first symbol is mainly used in Anglophone countries to represent the mathematical operation of division. In editing texts, the second symbol, also called a dagger mark , is used to indicate erroneous or dubious content; or as a reference mark or footnote indicator. It also has other uses in a variety of specialist contexts. Use in text annotation The modern dagger symbol originated from a variant of the obelus, originally depicted by a plain line , or a line with one or two dots . It represented an iron roasting spit, a dart, or the sharp end of a javelin, symbol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dagger (mark)
A dagger, obelisk, or obelus is a typographical mark that usually indicates a footnote if an asterisk has already been used. The symbol is also used to indicate death (of people) or extinction (of species). It is one of the modern descendants of the obelus, a mark used historically by scholars as a critical or highlighting indicator in manuscripts. (The term obelisk derives from the grc-gre, ὀβελίσκος ('), which means "little obelus"; from (') meaning 'roasting spit'). A double dagger or diesis is a variant with two handles that usually marks a third footnote after the asterisk and dagger. The triple dagger is a variant with three handles and is used by medievalists to indicate another level of notation. History The dagger symbol originated from a variant of the obelus, originally depicted by a plain line or a line with one or two dots . It represented an iron roasting spit, a dart, or the sharp end of a javelin, symbolizing the skewering or cutting ou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dagger (typography)
A dagger, obelisk, or obelus is a typographical mark that usually indicates a footnote if an asterisk has already been used. The symbol is also used to indicate death (of people) or extinction (of species). It is one of the modern descendants of the obelus, a mark used historically by scholars as a critical or highlighting indicator in manuscripts. (The term obelisk derives from the grc-gre, ὀβελίσκος ('), which means "little obelus"; from (') meaning 'roasting spit'). A double dagger or diesis is a variant with two handles that usually marks a third footnote after the asterisk and dagger. The triple dagger is a variant with three handles and is used by medievalists to indicate another level of notation. History The dagger symbol originated from a variant of the obelus, originally depicted by a plain line or a line with one or two dots . It represented an iron roasting spit, a dart, or the sharp end of a javelin, symbolizing the skewering or cutting ou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Obelus Variants
An obelus (plural: obeluses or obeli) is a term in typography that refers to a historical mark which has resolved to three modern meanings: * Division sign * Dagger * Commercial minus sign (limited geographical area of use) The word "obelus" comes from (obelós), the Ancient Greek word for a sharpened stick, spit, or pointed pillar. This is the same root as that of the word 'obelisk'. In mathematics, the first symbol is mainly used in Anglophone countries to represent the mathematical operation of division. In editing texts, the second symbol, also called a dagger mark , is used to indicate erroneous or dubious content; or as a reference mark or footnote indicator. It also has other uses in a variety of specialist contexts. Use in text annotation The modern dagger symbol originated from a variant of the obelus, originally depicted by a plain line , or a line with one or two dots . It represented an iron roasting spit, a dart, or the sharp end of a javelin, symbolizi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Division Sign
The division sign () is a symbol consisting of a short horizontal line with a dot above and another dot below, used in Anglophone countries to indicate mathematical division. However, this usage, though widespread in some countries, is not universal; it is used for other purposes in other countries and its use to denote division is not recommended in the ISO 80000-2 standard for mathematical notation. In mathematics The obelus, a historical glyph consisting of a horizontal line with (or without) one or more dots, was first used as a symbol for division in 1659, in the algebra book ' by Johann Rahn, although previous writers had used the same symbol for subtraction. pp 270,271 Some near-contemporaries believed that John Pell, who edited the book, may have been responsible for this use of the symbol. Other symbols for division include the slash or solidus , the colon , and the fraction bar (the horizontal bar in a vertical fraction). The ISO 80000-2 standard for mathemat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commercial Minus Sign
The commercial minus sign is a typographical and mathematical symbol used in commercial and financial documents in some European languages, in specific contexts. In some commercial and financial documents, especially in Germany and Scandinavia, the commercial minus sign is used to signify a negative remainder of a division operation. The symbol is also used in the margins of letters to indicate an enclosure, where the upper point is sometimes replaced with the corresponding number. The Uralic Phonetic Alphabet uses commercial minus signs to denote borrowed forms of a sound. In Finland, it is used as a symbol for a correct response (the check mark indicates an ''incorrect'' response). Typographic variant In Germany, the form was historically an alternative to the formal glyph, since this could be conveniently typed on a typewriter. It also provides a convenient alternative means for typing on a modern keyboard, without needing to resort to Unicode input. See also * Obelus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aristarchian Symbols
Aristarchian symbols are editorial marks developed during the Hellenistic period and the early Roman empire for annotating then-ancient Greek texts—mainly the works of Homer. They were used to highlight missing text, text which was discrepant between sources, and text which appeared in the wrong place. Two main types of ancient Greek philological annotations can be distinguished: signs and explicit notes. Aristarchian symbols are signs. Early development The first philological sign () invented by Zenodotos of Ephesos, the first head of the Alexandrinian Library, in his edition of Homer was the (, a short horizontal dash ), which Zenodotos used to mark spurious lines. For this reason, the practice of using signs for textual criticism has been called 'obelism'. Aristophanes of Byzantium invented later the ' asterisk' () to mark lines that are duplicated from another place, as well as the 'lunate sigma' () and the 'antisigma' () for two consecutive and interchangeable li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Obelism
Obelism is the practice of annotating manuscripts with marks set in the margins. Modern obelisms are used by editors when proofreading a manuscript or typescript. Examples are "stet" (which is Latin for "Let it stand", used in this context to mean "disregard the previous mark") and "dele" (for "Delete"). The obelos symbol (see obelus) gets its name from the spit, or sharp end of a lance in ancient Greek. An obelos was placed by editors on the margins of manuscripts, especially in Homer, to indicate lines that may not have been written by Homer. The system was developed by Aristarchus and notably used later by Origen in his ''Hexapla''. Origen marked spurious words with an opening obelos and a closing metobelos ("end of obelus"). There were many other such shorthand Shorthand is an abbreviated symbolic writing method that increases speed and brevity of writing as compared to longhand, a more common method of writing a language. The process of writing in shorthand is called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Division Sign
The division sign () is a symbol consisting of a short horizontal line with a dot above and another dot below, used in Anglophone countries to indicate mathematical division. However, this usage, though widespread in some countries, is not universal; it is used for other purposes in other countries and its use to denote division is not recommended in the ISO 80000-2 standard for mathematical notation. In mathematics The obelus, a historical glyph consisting of a horizontal line with (or without) one or more dots, was first used as a symbol for division in 1659, in the algebra book ' by Johann Rahn, although previous writers had used the same symbol for subtraction. pp 270,271 Some near-contemporaries believed that John Pell, who edited the book, may have been responsible for this use of the symbol. Other symbols for division include the slash or solidus , the colon , and the fraction bar (the horizontal bar in a vertical fraction). The ISO 80000-2 standard for mathemat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ratio
In mathematics, a ratio shows how many times one number contains another. For example, if there are eight oranges and six lemons in a bowl of fruit, then the ratio of oranges to lemons is eight to six (that is, 8:6, which is equivalent to the ratio 4:3). Similarly, the ratio of lemons to oranges is 6:8 (or 3:4) and the ratio of oranges to the total amount of fruit is 8:14 (or 4:7). The numbers in a ratio may be quantities of any kind, such as counts of people or objects, or such as measurements of lengths, weights, time, etc. In most contexts, both numbers are restricted to be positive. A ratio may be specified either by giving both constituting numbers, written as "''a'' to ''b''" or "''a'':''b''", or by giving just the value of their quotient Equal quotients correspond to equal ratios. Consequently, a ratio may be considered as an ordered pair of numbers, a fraction with the first number in the numerator and the second in the denominator, or as the value denoted by this ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colon (punctuation)
The colon is a punctuation mark consisting of two equally sized dots aligned vertically. A colon often precedes an explanation, a list, or a quoted sentence. It is also used between hours and minutes in time, between certain elements in medical journal citations, chapter and verse in Bible citations, and, in the US, for salutations in business letters and other formal letter writing. History In Ancient Greek, in rhetoric and prosody, the term (', 'limb, member of a body') did not refer to punctuation, but to a member or section of a complete thought or passage; see also '' Colon (rhetoric)''. From this usage, in palaeography, a colon is a clause or group of clauses written as a line in a manuscript.''Oxford English Dictionary'', 1st ed. "colon, ''n.²''" Oxford University Press (Oxford), 1891. In the 3rd century BC, Aristophanes of Byzantium is alleged to have devised a punctuation system, in which the end of such a was thought to occasion a medium-length breath, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fraction (mathematics)
A fraction (from la, fractus, "broken") represents a part of a whole or, more generally, any number of equal parts. When spoken in everyday English, a fraction describes how many parts of a certain size there are, for example, one-half, eight-fifths, three-quarters. A ''common'', ''vulgar'', or ''simple'' fraction (examples: \tfrac and \tfrac) consists of a numerator, displayed above a line (or before a slash like ), and a non-zero denominator, displayed below (or after) that line. Numerators and denominators are also used in fractions that are not ''common'', including compound fractions, complex fractions, and mixed numerals. In positive common fractions, the numerator and denominator are natural numbers. The numerator represents a number of equal parts, and the denominator indicates how many of those parts make up a unit or a whole. The denominator cannot be zero, because zero parts can never make up a whole. For example, in the fraction , the numerator 3 indicates that the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slash (punctuation)
The slash is the oblique slanting line punctuation mark . Also known as a stroke, a solidus or several other historical or technical names including oblique and virgule. Once used to mark periods and commas, the slash is now used to represent division and fractions, exclusive 'or' and inclusive 'or', and as a date separator. A slash in the reverse direction is known as a backslash. History Slashes may be found in early writing as a variant form of dashes, vertical strokes, etc. The present use of a slash distinguished from such other marks derives from the medieval European virgule ( la, virgula, which was used as a period, scratch comma, and caesura mark. (The first sense was eventually lost to the low dot and the other two developed separately into the comma and caesura mark ) Its use as a comma became especially widespread in France, where it was also used to mark the continuation of a word onto the next line of a page, a sense later taken on by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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