Tuple

A tuple is a finite ordered list of elements. In mathematics, an n-tuple is a sequence (or ordered list) of n elements, where n is a non-negative integer. There is only one 0-tuple, an empty sequence. An n-tuple is defined inductively using the construction of an ordered pair. Tuples are usually written by listing the elements within parentheses "" and separated by commas; for example, denotes a 5-tuple. Sometimes other symbols are used to surround the elements, such as square brackets "[ ]" or angle brackets "< >". Braces "{ }" are never used for tuples, as they are the standard notation for sets. Tuples are often used to describe other mathematical objects, such as vectors. In computer science, tuples are directly implemented as product types in most functional programming languages. More commonly, they are implemented as record types, where the components are labeled instead of being identified by position alone. This approach is also used in relational algebra. Tuples are also used in relation to programming the semantic web with Resource Description Framework or RDF. Tuples are also used in linguistics and philosophy.

Single (football)

In Canadian football, a single (single point, or rouge), scoring one point, is awarded when the ball is kicked into the end zone by any legal means, other than a successful field goal, and the receiving team does not return, or kick, the ball out of its end zone. It is also a single if the kick travels through the end zone or goes out of bounds in the end zone without being touched, except on a kickoff. After conceding a single, the receiving team is awarded possession of the ball at the 35-yard line of its own end of the field.

Singles are not awarded in the following situations:

In all these cases the defending team is awarded possession of the ball at the 25-yard line.

In the United States, singles are not usually recognized in most leagues and are awarded only in matches played under the auspices of the National Indoor Football League (formerly United Indoor Football) and the now-defunct American Indoor Football Association. It is applied only on kickoffs in both leagues, and is scored if the receiving team fails to advance the ball out of the end zone when kicked. The NIFL also allowed a single to be scored by kicking a kickoff through the uprights (as in a field goal); this type of single is nicknamed (and has since been codified in the NIFL rules as) an uno, from the Spanish word for the number one. At one point, the Philadelphia Public League (the public high school football sanctioning body in Philadelphia, Pennsylvania) awarded three points for kicking a kickoff through the uprights.

Single (Natasha Bedingfield song)

"Single" is a pop song by British singer Natasha Bedingfield. It was written by Steve Kipner, Andrew Frampton, Wayne Wilkins and Bedingfield for her debut album, Unwritten (2004), with production handled by the former three. It received a positive reception from music critics and was released as the first single in Europe in the second quarter of 2004, reaching the top five in the United Kingdom. In North and Latin America, "Single" was released as Bedingfield's third single in the second quarter of 2006. On the U.S. Billboard Hot 100 chart, the song reached number fifty-seven.

Chart performance

"Single" entered the UK Singles Chart on 17 May 2004 at number three, remaining on the chart for ten weeks. The track also reached the top ten in Ireland, where it reached number seven. The single was also successful in Europe. It reached number sixteen in Norway and number seventeen in Sweden. In North America, "Single" performed moderately well. The song debuted at number seventy-two on the Billboard Hot 100 on 24 June 2006 and reached a peak position at number fifty-seven, remaining on the chart for six weeks. It did well on pop-oriented charts, reaching number thirty-eight on the Pop 100 and number twenty-six on the Top 40 Mainstream.

Libra

Libra may refer to:

Science and technology

Entertainment

Other

Libra (Gary Bartz album)

Libra is the debut album by saxophonist Gary Bartz' Quintet recorded in 1967 and released on the Milestone label.

Reception

Michael G. Nastos of Allmusic said "Featured are excellent compositions and playing in mainstream mode... This is the more lyrical side of Bartz".

Track listing

All compositions by Gary Bartz except as indicated

Personnel

References

Libra (DC Comics)

Libra is a fictional character, a supervillain appearing in comic books published by DC Comics. He first appeared in Justice League of America #111 (May-June 1974), where he formed the first incarnation of the Injustice Gang (though there had been other villain groups with similar names, like the Injustice Society and the Injustice League). Libra made his return with a leading role in Final Crisis in 2008.

Publication history

Libra's only major appearance, prior to his appearance in Final Crisis, was in Justice League of America #111–112, in 1974. In 2004, he made a brief cameo in the JLA/Avengers crossover (#4) by Kurt Busiek and George Pérez.

Grant Morrison, the writer of Final Crisis, explained the reason for picking an obscure villain:

In May 2008, his appearances were reprinted in DC Universe Special: Justice League of America at the same time as he was reintroduced, along with the Human Flame (a Martian Manhunter foe who appeared in Detective Comics #274), in Justice League of America #21. He returns, apparently retaining the full might of his godlike status, to lead a new and final incarnation of the Secret Society of Super-Villains, this time offering to every villain, from simple costumed crooks to major ones, the realization of his/her fondest wish.