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.

Suite No. 1 (Rachmaninoff)

Suite No. 1 (or Fantaisie-Tableaux for two pianos), Op. 5, is a composition for two pianos by Sergei Rachmaninoff. Composed in the summer of 1893 at the Lysikofs estate in Lebeden, Kharkov, this suite was initially titled Fantaisie-Tableux since Rachmaninoff intended it, as he explained in a letter to his cousin Sofia Satin, to consist "of a series of musical pictures." While François-Rene Tranchefort asserts that the music illustrates four extracts of poems (written by Mikhail Lermontov, Lord Byron, Fyodor Tyutchev and Aleksey Khomyakov), Rachmaninoff biographer Max Harrison counters that while the poems "convey something of the emotional tone of the music," the music itself is not programmatic.

This work was first performed on November 30, 1893, by Rachmaninoff and Pavel Pabst in Moscow, and is dedicated to Tchaikovsky. Rachmaninoff composed a second suite in 1901.

The four movements are:

I. Barcarolle. Allegretto, in G minor.
II. La nuit... L'amour... Adagio sostenuto, in D major. (The night...the love...)
III. Les Larmes. Largo di molto, in G minor. (The Tears)
IV. Pâques. Allegro maestoso, in G minor. (Easter)

Cello

The cello (/ˈtʃɛloʊ/ CHEL-oh; plural cellos or celli) or violoncello (/ˌvaɪələnˈtʃɛloʊ/ VY-ə-lən-CHEL-oh;Italian pronunciation: [vjolonˈtʃɛllo]) is a bowed string instrument with four strings tuned in perfect fifths. It is a member of the violin family of musical instruments, which also includes the violin and viola.

The cello is used as a solo musical instrument, as well as in chamber music ensembles, string orchestras, as a member of the string section of symphony orchestras, and some rock bands. It is the second-largest bowed string instrument in the modern symphony orchestra, the double bass being the largest.

Cellos were derived from other mid- to large-sized bowed instruments in the 16th century, such as the viola da gamba, and the generally smaller and squarer viola da braccio, and such instruments made by members of the Amati family of luthiers.

Cello parts are generally written in the bass clef, but both tenor and treble clefs are used for higher-range parts.

A person who plays the cello is called a cellist or violoncellist.

Surname

A surname or family name is a name added to a given name. In many cases, a surname is a family name and many dictionaries define "surname" as a synonym of "family name". In the western hemisphere, it is commonly synonymous with last name because it is usually placed at the end of a person's given name.

In most Spanish-speaking and Portuguese-speaking countries, two or more last names (or surnames) may be used. In China, Hungary, Japan, Korea, Madagascar, Taiwan, Vietnam, and parts of India, the family name is placed before a person's given name.

The style of having both a family name (surname) and a given name (forename) is far from universal. In many countries, it is common for ordinary people to have only one name or mononym.

The concept of a "surname" is a relatively recent historical development, evolving from a medieval naming practice called a "byname". Based on an individual's occupation or area of residence, a byname would be used in situations where more than one person had the same name.

Yo-Yo Ma

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Yo-Yo Ma (born October 7, 1955) is a French-born Chinese Americancellist. Born in Paris, he spent his schooling years in New York City and was a child prodigy, performing from the age of five. He graduated from the Juilliard School and Harvard University and has enjoyed a prolific career as both a soloist performing with orchestras around the world and a recording artist. His 90+ albums have received 18 Grammy Awards.

In addition to recordings of the standard classical repertoire, he has recorded a wide variety of folk music such as American bluegrass music, traditional Chinese melodies, the tangos of Argentinian composer Ástor Piazzolla, and Brazilian music. He also collaborated with Grammy Award-winning jazz/reggae singer Bobby McFerrin. During the Dixie Chicks' controversial tour of 2005-6, Ma backed them playing cello as sideman, assisting in the string arrangements for the band.