All articles starting with Q
2,252 articles
Quotient rule
The quotient rule is a differential calculus formula giving the derivative of a quotient of two differentiable functions, (f/g)' = (f'g − fg')/g², valid wherever the denominator g is nonzero.
Quotient set
A quotient set is the set of all equivalence classes of a set under an equivalence relation, so equivalence becomes equality, as in the integers modulo n.
Quotient space (linear algebra)
The quotient space V/W of a vector space V by a subspace W is the vector space of cosets v + W, formed by collapsing W to zero.
Quotient stack
A quotient stack, also called a quotient algebraic stack, is an algebraic stack of the form [X/G], recording orbits and stabilizers of a group action.
Qur'an of Ahmed Karahisari
The Qur'an of Ahmed Karahisari (مصحف أحمد قره حصاري) is a monumental illuminated Qur'an copied by the Ottoman calligrapher Ahmed Karahisari for Sultan Süleyman the Magnificent, held in the Topkapı Palace Museum Library.
Qur'an of Ibn al-Bawwab
The Qur'an of Ibn al-Bawwab (ابن البواب) is a complete illuminated Qur'an copied in Baghdad in 391 AH (1000–1001) and held in the Chester Beatty Library in Dublin.
QurAlis
QurAlis Corp is a Cambridge, Massachusetts biotechnology company founded in 2016 by Kasper Roet, Kevin Eggan, and Clifford Woolf, developing precision medicines for ALS and frontotemporal dementia.
Quran (القرآن)
The Quran (القرآن), also called the Koran, is the central text of Islam; its earliest manuscripts date to the seventh century, and nearly all follow one ʿUthmānic text type.
Quran recitation competition
A Quran recitation competition is a contest judged on tajwid, melodic delivery, fluency, and memorization; the first international event was held in Kuala Lumpur in 1961.
Quran translations
Quran translations, or translations of the Koran, render the Arabic Quran into other languages and are regarded by Muslims as interpretation, not the Quran itself.
Quran translations into African languages
Quran translations into African languages are renderings of the Quran into tongues such as Swahili, Yoruba, Hausa, Wolof, and Amazigh, beginning with M.S. Cole's 1906 Yoruba translation in Lagos.
Quran translations into Asian languages
Quran translations into Asian languages include 21 Malay translations since the 17th century, China's first complete translation in 1927, and Indonesia's official version, printed 7 to 10 million copies yearly.
Quran translations into European languages
Quran translations into European languages are renderings of the Arabic Quran into Latin and European vernaculars, beginning with Robert of Ketton's Latin version of 1143.
Quranic cosmology
Quranic cosmology is the picture of the heavens, the earth, and the divine Throne presented in the Quran, centered on seven heavens built one above another.
Quranism
Quranism (Arabic: al-Qur'aniyya), also called Quran-only Islam, is a reformist current in Islam whose adherents, called Qur'aniyoon, hold that the Quran alone is the source of Islamic law and reject the hadith.
Quratulain Balouch
Quratulain Balouch, known as QB, is a Pakistani American singer-songwriter who rose to fame with "Woh Humsafar Tha" and appears across five Coke Studio seasons.
Quraysh (قريش)
Quraysh (قريش), the Arab tribe of Mecca and of Muhammad: holders of the Kaaba and pilgrimage offices, controllers of the Yemen–Levant caravan trade via ilaf agreements, defeated at Mecca's conquest in 630 CE.
Quraysh boycott of Banu Hashim
The Quraysh boycott of Banu Hashim (حصار شعب أبي طالب) was a three-year pact by Mecca's Quraysh clans to isolate Muhammad's clan in Shi'b Abi Talib, ending without success.
Quraysh takeover of Mecca
The Quraysh takeover of Mecca (قيام قريش على مكة) was the transfer of rule over Mecca and the Ka'ba from Khuza'a to Quraysh under Qusayy ibn Kilab, in the fifth century AD.
Qurayyah CC power plant
The Qurayyah CC power plant is a gas-fired combined cycle power station at Qurayyah in Saudi Arabia's Eastern Province, with a capacity of 4,600 MW.
Qurayyah II power plant
The Qurayyah II power plant is a natural-gas-fired combined cycle plant at Qurayyah in Saudi Arabia's Eastern Province, with capacity reported between about 3,230 and 3,828 MW.
Qurayyah Thermal power plant
Qurayyah Thermal power plant is a power generation complex on the sea coast of Saudi Arabia's Eastern Province, including the 3,927 MW Qurayyah Independent Power Plant.
Qurban (TV series)
Qurban is a 2017 Pakistani drama serial for ARY Digital, starring Iqra Aziz, Bilal Abbas Khan, and Shehzad Sheikh in a love triangle built around a forced second marriage.
Qurbani (क़ुर्बानी) (film)
Qurbani (क़ुर्बानी) is a 1980 Hindi action thriller produced, directed by, and starring Feroz Khan with Vinod Khanna and Zeenat Aman; the biggest Bollywood hit of 1980, famous for the disco song "Aap Jaisa Koi" by Nazia Hassan.
Qurchi
Qurchi (قورچی) were the royal guard cavalry corps of the Safavid shahs of Iran, recruited from the Qizilbash tribes and paid directly by the shah.
Qure.AI
Qure.AI is a Mumbai-based healthtech company founded in 2016 by Prashant Warier and Pooja Rao, making FDA-cleared AI software that reads chest X-rays and head CT scans.
Qurna
Sheikh Abd el-Qurna, also known as Gurna, is a hill on the west bank of the Nile at Luxor, Egypt, cut with about 150 decorated private tombs of New Kingdom officials.
Qurna Queen
The Qurna Queen is the modern name for an unnamed royal woman of ancient Egypt's Second Intermediate Period, buried around 1600 BC at Qurna on the west bank at Thebes.
Qurna West 1 oil field
Qurna West 1, also known as West Qurna 1, is a giant oil field in southern Iraq producing about 550,000 barrels per day under operator PetroChina since 2024.
Qurna West 2 oil field
Qurna West 2, also known as West Qurna-2, is a giant oil field in southern Iraq near Basra, developed by Russia's Lukoil from 2010 to 2026.