& (disambiguation)

&, or ampersand, is a typographic symbol.

& may also refer to:

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/&_(disambiguation)

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 " $(\text{ })$ " and separated by commas; for example, $(2, 7, 4, 1, 7)$ 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.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Tuple

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:

if a ball is downed in the end zone after being intercepted in the end zone

if a ball is fumbled outside the end zone

if the kicked ball hits the goalposts (since the 1970s; before then it was a live ball)

when a kickoff goes into the end zone and then out of bounds without being touched

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.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Single_(football)

Palomar (comics)

Palomar (subtitled The Heartbreak Soup Stories) is the title of a graphic novel written and drawn by Gilbert Hernandez and published in 2003 by Fantagraphics Books (ISBN 1-56097-539-3). It collects work previously published within the pages of Love and Rockets (volume one). Palomar is the fictional town in Latin America where all the stories presented are set. Palomar is included in Time magazine's Best Comics of 2003 list, and in 2005 was one of Time's 100 best graphic novels of all time.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Palomar_(comics)

Palomar 12

Palomar 12 is a globular cluster in the constellation Capricornus that belongs to the halo of the Milky Way Galaxy.

First discovered on the National Geographic Society – Palomar Observatory Sky Survey plates by Robert George Harrington and Fritz Zwicky, it was catalogued as a globular cluster. However Zwicky came to believe this was actually a nearby dwarf galaxy in the Local Group. It is a relatively young cluster, being about 30% younger than most of the globular clusters in the Milky Way. It is metal-rich with a metallicity of [Fe/H] ~= -0.8. It has an average luminosity distribution of M_v = -4.48.

Based on proper motion studies, this cluster was first suspected in 2000 to have been captured from the Sagittarius dwarf galaxy about 1.7 Ga ago. It is now generally believed to be a member of the Sagittarius dwarf galaxy (Cohen 2004, Sbordone et al. 2006). It is estimated to be 6.5 Gyr old.

References

External links

Simbad reference data

SEDS: Palomar 12, Capricornus Dwarf

Palomar 12 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Palomar_12

Palomar 4

Palomar 4 is a globular cluster of the Milky Way galaxy. It was discovered in 1949 by Edwin Hubble and again in 1955 by A. G. Wilson. It is 356,000 light-years away.

This star cluster is further away than the Magellanic Clouds and SagDEG satellite galaxies.

Initially it was thought to be a dwarf galaxy, and it was given the name Ursa Major Dwarf. However, it was later discovered to be a globular cluster.