The system was further refined by his student Aristophanes of Byzantium, who first introduced the asterisk and used a symbol resembling a ⊤ for an obelus ; and finally by Aristophanes ' student, in turn, Aristarchus, from whom they earned the name of ' Aristarchian symbols '.

While the asterisk ( asteriscus ) was used for corrective additions, the obelus was used for corrective deletions of invalid reconstructions.

The obelus was also occasionally used as a mathematical symbol for subtraction.

Meanwhile, division was represented with the classic mathematical division symbol ( the obelus, ÷), which was implemented by overstriking a minus sign and a colon ( on both EBCDIC and ASCII paper terminals ).

Many new readings were inserted in the text with an asterisk affixed, while an obelus was used to mark many others as corrupt.

" In the Septuagint column used the system of diacritical marks which was in use with the Alexandrian critics of Homer, especially Aristarchus, marking with an obelus under different forms, as "./.

The obelus is also used alone to represent the division operation itself, as for instance as a label on a key of a calculator.

Some scholars used the obelus and various other critical symbols, in conjunction with a second symbol known as the metobelos (" end of obelus "), variously represented as two vertically arranged dots, a γ-like symbol, a mallet-like symbol, or a diagonal slash ( with or without one or two dots ).

310 – 320 – 403 ) used both a horizontal slash or hook ( with or without dots ) and an upright and slightly slanting dagger to represent an obelus.

St. Jerome ( c. 347 – 420 ) used a simple horizontal slash for an obelus, but only for passages in the Old Testament.

The obelus accompanied by points is used when we do not know whether a passage should be suppressed or not.

The obelus had been used by some writers to represent subtraction, and that usage continued in some parts of Europe ( including Norway and, until fairly recently, Denmark ).

The obelus is occasionally used in Polish language typography to represent ranges ( such as the range 1 ÷ 10 ).

The obelus is primarily used as a symbol for division ( as on a calculator ) and as an operator in elementary arithmetic.

In Denmark, the obelus is used as the mathematical symbol for " Subtraction ".

The dagger symbol originated from a variant of the obelus ( plural: obeli ), originally depicted by a plain line (-) or a line with one or two dots (÷).

Isidore of Seville ( c. 560 – 636 AD ) described the use of the symbol as follows: " The obelus is appended to words or phrases uselessly repeated, or else where the passage involves a false reading, so that, like the arrow, it lays low the superfluous and makes the errors disappear ...

An obelus ( symbol: ÷, plural: obeli ) is a symbol consisting of a short horizontal line with a dot above and below.

The word " obelus " comes from, the Greek word for a sharpened stick, spit, or pointed pillar.

Rahn is credited with the invention of the division sign ÷ ( obelus ); it has also been attributed to Pell, who taught Rahn a three-column spreadsheet-style technique of tabulation of calculations, and acted as editor for Rahn's 1659 book Teutsche Algebra in which it appeared.

A second way to show division is to use the obelus ( or division sign ), common in arithmetic, in this manner:

In the Unicode character set, the obelus is known as the “ division sign ” and has the code point U + 00F7.

In English-speaking countries, long division does not use the slash (/) or obelus (÷) signs, instead displaying the dividend, divisor, and ( once it is found ) quotient in a tableau.

The obelus is believed to have been invented by the Homeric scholar Zenodotus as one of a system of editorial symbols.

The obelus, invented by Aristarchus to mark suspected passages in Homer, is frequent in manuscripts of the Gospel to mark just those sections, like the Pericope in John, which modern editors reject.

In Microsoft Windows, the obelus is produced with Alt + 0247 on the number pad or by pressing Alt Gr, Shift and the "+ =" key.

In LaTeX, the obelus is obtained by < tt >

Three variants of obelus glyphs.

# A recension of the Septuagint, with ( 1 ) interpolations to indicate where the Hebrew is not represented in the Septuagint — these are taken mainly from Theodotion's text and marked with asterisks, and ( 2 ) indications, using signs called obeloi ( singular: obelus ), of where words, phrases, or occasionally larger sections in the Septuagint do not reflect any underlying Hebrew.

But her prettiness was what he had noticed first, and all the other things had come afterward: cruelty, meanness, self-will.

There was an artificial lake just out of sight in the first stand of trees, fed by a half dozen springs that popped out of the ground above the hillside orchard.

The first part of the road was steep, but it leveled off after the second bend and curled gradually into the valley.

No one was behind it, but in the rear wall of the office I noticed, for the first time, a door which had been left partially open.

The herd was watered and then thrown onto a broad grass flat which was to be the first night's bedground.

Once again, Tom Horn was the first and most likely suspect, and he was brought in for questioning immediately.

For Matilda, it was the first she had known in many a night.

Even the knowledge that she was losing another boy, as a mother always does when a marriage is made, did not prevent her from having the first carefree, dreamless sleep that she had known since they dropped down the canyon and into Bear Valley, way, way back there when they were crossing those other mountains.

Stevens was grunting over the last empty pocket when Russ abruptly rose and lunged toward Carmer's hat, which had tumbled half-a-dozen feet away when he first fell.

The Indian's arm whipped sidewise -- there was a flash of amber and froth, the crash of the bottle shattering against the side of the first car.

It was her first smile.

At first, I thought he was out of his head, talking wildly like this.

Hell, I gave him the first decent job he ever had, six, seven -- how many years ago was it, Rob ''??

Miss Langford ( her first name was Evelyn ) was an attractive girl.

School began in August, the hottest part of the year, and for the first few days Miss Langford was very lenient with the children, letting them play a lot and the new ones sort of get acquainted with one another.

It was just as well that the ignorant Dandy enjoyed himself to the hilt that first evening, for the room was to become his prison cell.

`` Bastards '', he would say, `` all I did was put a beat to that Vivaldi stuff, and the first chair clobbered me ''!!

In 1961 the first important legislative victory of the Kennedy Administration came when the principle of national responsibility for local economic distress won out over a `` state's-responsibility '' proposal -- provision was made for payment for unemployment relief by nation-wide taxation rather than by a levy only on those states afflicted with manpower surplus.

The first systematic thinking about this Pandora's box within Pandora's boxes was done four years ago by Fred Ikle, a frail, meek-mannered Swiss-born sociologist.

The smell at first was more surprising than unpleasant.

His collaboration with Washington, begun when he was the general's aide during the Revolution, was resumed when he entered the first Cabinet as Secretary of the Treasury.