1 (number)

1 (one; /ˈwʌn/ or UK /ˈwɒn/, also called unit, unity, and (multiplicative) identity), is a number, a numeral, and the name of the glyph representing that number. It represents a single entity, the unit of counting or measurement. For example, a line segment of unit length is a line segment of length 1.

As a number

One, sometimes referred to as unity, is the integer before two and after zero. One is the first non-zero number in the natural numbers as well as the first odd number in the natural numbers.

Any number multiplied by one is that number, as one is the identity for multiplication. As a result, one is its own factorial, its own square, its own cube, and so on. One is also the result of the empty product, as any number multiplied by one is itself. It is also the only natural number that is neither composite nor prime with respect to division, but instead considered a unit.

As a digit

The glyph used today in the Western world to represent the number 1, a vertical line, often with a serif at the top and sometimes a short horizontal line at the bottom, traces its roots back to the Indians, who wrote 1 as a horizontal line, much like the Chinese character 一. The Gupta wrote it as a curved line, and the Nagari sometimes added a small circle on the left (rotated a quarter turn to the right, this 9-look-alike became the present day numeral 1 in the Gujarati and Punjabi scripts). The Nepali also rotated it to the right but kept the circle small. This eventually became the top serif in the modern numeral, but the occasional short horizontal line at the bottom probably originates from similarity with the Roman numeral I. In some countries, the little serif at the top is sometimes extended into a long upstroke, sometimes as long as the vertical line, which can lead to confusion with the glyph for seven in other countries. Where the 1 is written with a long upstroke, the number 7 has a horizontal stroke through the vertical line.

Piano concerto

A piano concerto is a concerto written for a piano accompanied by an orchestra or other large ensemble.

Keyboard concerti were common in the time of Johann Sebastian Bach. Occasionally, Bach's harpsichord concerti are played on piano.

History

In the 17th and 18th centuries, typical concertos for keyboard were organ concertos and harpsichord concertos, such as those written by George Friedrich Handel and Johann Sebastian Bach.

Classical and romantic

As the piano developed and became accepted, composers naturally started writing concerti for it. This happened in the late 18th century, during the Classical music era. Wolfgang Amadeus Mozart was the most important composer in the early development of the form. Mozart's body of masterly piano concerti put his stamp firmly on the genre well into the Romantic era.

Mozart wrote many piano concertos for himself to perform (his 27 piano concertos also include concerti for two and three pianos). With the rise of the piano virtuoso, many composer-pianists did likewise, notably Ludwig van Beethoven, Frédéric Chopin, and Robert Schumann—and also lesser-known musicians like Johann Nepomuk Hummel, Joseph Wölfl, Carl Maria von Weber, John Field, Ferdinand Ries, and F. X. Mozart.

Maher Zain

Maher Zain (Arabic: ماهر زين‎ ; born 16 July 1981) is a Muslim Swedish R&B singer, songwriter and music producer of Lebanese origin. With more Facebook fans than any other Muslim artist, award-winning singer-songwriter Maher Zain is one of the biggest stars in modern Islamic music. He released his debut album Thank You Allah, an internationally successful album produced by Awakening Records, in 2009. He released his follow-up album Forgive Me in April 2012 under the same production company.

Career

Beginnings

Maher Zain's Lebanese family emigrated to Sweden when he was eight. He completed his schooling there, gaining a bachelor's degree in Aeronautical Engineering. After university, he entered the music industry in Sweden and linked up with RedOne, the Moroccan-born Swedish producer, in 2005. When RedOne moved to New York in 2006, Maher Zain followed soon after to continue his music industry career in the USA producing for artists such as Kat DeLuna.

On returning home to Sweden, he became engaged once more with his Islamic faith and decided to move away from a career as a music producer to become a singer/songwriter of contemporary R&B music with a strong Muslim religious influence.

Piano Concerto No. 1

Piano Concerto No. 1 refers to the first piano concerto published by one of a number of composers (for example the first concerti of Beethoven and Chopin were published before the second respective concerti):

Martha Argerich

Martha Argerich (born June 5, 1941) is an Argentine pianist, widely regarded as one of the greatest pianists of the second half of the 20th century.

Early life

Argerich was born in Buenos Aires, Argentina. Her paternal ancestors were Catalonians based in Buenos Aires since the 18th century. Her maternal grandparents were Jewish immigrants from the Russian Empire, who settled in Colonia Villa Clara in the Entre Ríos province—one of the colonies established by Baron de Hirsch and the Jewish Colonization Association. The provenance of the name Argerich is Catalonia, Spain. She started playing the piano at age three. At the age of five, she moved to teacher Vincenzo Scaramuzza, who stressed to her the importance of lyricism and feeling. Argerich gave her debut concert in 1949 at the age of eight.

The family moved to Europe in 1955, where Argerich studied with Friedrich Gulda in Austria. Juan Perón, then the president of Argentina, made their decision possible by appointing her parents to diplomatic posts in the Argentine Embassy in Vienna. She later studied with Stefan Askenase and Maria Curcio. Argerich also seized opportunities for brief periods of coaching with Madeleine Lipatti (widow of Dinu Lipatti), Abbey Simon, and Nikita Magaloff. In 1957, at sixteen, she won both the Geneva International Music Competition and the Ferruccio Busoni International Competition, within three weeks of each other. It was at the latter that she met Arturo Benedetti Michelangeli, whom she would later seek out for lessons during a personal artistic crisis at the age of twenty, though she only had four lessons with him in a year and a half. Her greatest influence was Gulda, with whom she studied for 18 months.