Question: What subject was studied in David Sassoon's birthplace?

full_context: Document 1: Ashkenazi Jews: In an essay on Sephardi Jewry, Daniel Elazar at the Jerusalem Center for Public Affairs summarized the demographic history of Ashkenazi Jews in the last thousand years, noting that at the end of the 11th century, 97% of world Jewry was Sephardic and 3% Ashkenazi; by the end of XVI century, the: 'Treaty on the redemption of captives', by Gracian of the God's Mother, Mercy Priest, who was imprisoned by Turks, cites a Tunisian Hebrew, made captive when arriving to Gaeta, who aided others with money, named: 'Simon Escanasi', in the mid-17th century, "Sephardim still outnumbered Ashkenazim three to two", but by the end of the 18th century, "Ashkenazim outnumbered Sephardim three to two, the result of improved living conditions in Christian Europe versus the Ottoman Muslim world." By 1931, Ashkenazi Jews accounted for nearly 92% of world Jewry. These factors are sheer demography showing the migration patterns of Jews from Southern and Western Europe to Central and Eastern Europe.
Document 2: Saeed bin Maktoum bin Hasher Al Maktoum: Sheikh Saeed bin Maktoum bin Hasher Al Maktoum (1878 – 9 September 1958) () was the Ruler of Dubai from 1912 until his death in 1958. He presided over Dubai during the end of the pearling boom and through the long and difficult recession that followed the collapse of the pearling market, transforming Dubai into an active trading hub which developed new markets and economic opportunities.
Document 3: Muslim world: The Islamic Golden Age coincided with the Middle Ages in the Muslim world, starting with the rise of Islam and establishment of the first Islamic state in 622. The end of the age is variously given as 1258 with the Mongolian Sack of Baghdad, or 1492 with the completion of the Christian Reconquista of the Emirate of Granada in Al-Andalus, Iberian Peninsula. During the reign of the Abbasid caliph Harun ar-Rashid (786 to 809), the legendary House of Wisdom was inaugurated in Baghdad where scholars from various parts of the world sought to translate and gather all the known world's knowledge into Arabic. The Abbasids were influenced by the Quranic injunctions and hadiths, such as "the ink of a scholar is more holy than the blood of a martyr," that stressed the value of knowledge. The major Islamic capital cities of Baghdad, Cairo, and Córdoba became the main intellectual centers for science, philosophy, medicine, and education. During this period, the Muslim world was a collection of cultures; they drew together and advanced the knowledge gained from the ancient Greek, Roman, Persian, Chinese, Indian, Egyptian, and Phoenician civilizations.
Document 4: David Rabeeya: David Rabeeya is an Iraqi Jew born in Baghdad, Iraq. He and his family later moved to Israel in about 1951. In about 1970, he moved to the United States. Over the years, Dr. Rabeeya has taught countless students, in all schooling environments-high school, university, and elementary school. He has grown to accept all different cultures and religions over his lifetime, as an Arab Jew. A prolific author, Dr. Rabeeya has written many books on many subjects, but they tend to focus on the Middle East and the relationship between Jews and other groups. He currently works as a teacher for Middle and High School students.
Document 5: Mesopotamia: Mesopotamia is a historical region in West Asia situated within the Tigris -- Euphrates river system, in modern days roughly corresponding to most of Iraq plus Kuwait, the eastern parts of Syria, Southeastern Turkey, and regions along the Turkish -- Syrian and Iran -- Iraq borders.
Document 6: Ancient Near East: The ancient Near East was the home of early civilizations within a region roughly corresponding to the modern Middle East: Mesopotamia (modern Iraq, southeast Turkey, southwest Iran, northeastern Syria and Kuwait), ancient Egypt, ancient Iran (Elam, Media, Parthia and Persia), Anatolia / Asia Minor and Armenian Highlands (Turkey's Eastern Anatolia Region, Armenia, northwestern Iran, southern Georgia, and western Azerbaijan), the Levant (modern Syria, Lebanon, Palestine, Israel, and Jordan), Cyprus and the Arabian Peninsula. The ancient Near East is studied in the fields of Near Eastern archaeology and ancient history.
Document 7: David Sassoon: David Sassoon (October 1792 – November 7, 1864) was the treasurer of Baghdad between 1817 and 1829. He became the leader of the Jewish community in Bombay (now Mumbai) after Baghdadi Jews emigrated there.
Document 8: History of science: In mathematics, the Persian mathematician Muhammad ibn Musa al-Khwarizmi gave his name to the concept of the algorithm, while the term algebra is derived from al-jabr, the beginning of the title of one of his publications. What is now known as Arabic numerals originally came from India, but Muslim mathematicians did make several refinements to the number system, such as the introduction of decimal point notation. Sabian mathematician Al-Battani (850-929) contributed to astronomy and mathematics, while Persian scholar Al-Razi contributed to chemistry and medicine.
Document 9: Richard Sass: Sass exhibited at the Royal Academy in London from 1791 to 1813. He was appointed teacher in drawing to the Princess Charlotte, and later landscape painter to the Prince Regent. In 1825 he removed to Paris, where he spent the remainder of his life, altering his surname to "Sasse". He died there on 7 September 1849. He was survived by his wife Harriet (née Blake) who died in 1866, aged 76.
Document 10: Mumbai: In accordance with the Royal Charter of 27 March 1668, England leased these islands to the English East India Company in 1668 for a sum of £10 per annum. The population quickly rose from 10,000 in 1661, to 60,000 in 1675. The islands were subsequently attacked by Yakut Khan, the Muslim Koli admiral of the Mughal Empire, in October 1672, Rickloffe van Goen, the Governor-General of Dutch India on 20 February 1673, and Siddi admiral Sambal on 10 October 1673.In 1687, the English East India Company transferred its headquarters from Surat to Bombay. The city eventually became the headquarters of the Bombay Presidency. Following the transfer, Bombay was placed at the head of all the company's establishments in India. Towards the end of the 17th century, the islands again suffered incursions from Yakut Khan in 1689–90. The Portuguese presence ended in Bombay when the Marathas under Peshwa Baji Rao I captured Salsette in 1737, and Bassein in 1739.
Document 11: History of Bombay under Portuguese rule (1534–1661): Bombay, now called Mumbai, Bombaim in Portuguese, is the financial and commercial capital of India and one of the most populous cities in the world. At the time of arrival of the Portuguese, current Bombay was an archipelago of seven islands. Between the third century BCE and 1348, the islands came under the control of successive Hindu dynasties. The Muslim rulers of Gujarat, who had been ruling current Thane and Vasai for a few decades, annexed the islands in 1348, that were later governed by the Gujarat Sultanate from 1391 to 1534. Growing apprehensive of the power of the Mughal emperor Humayun, Sultan Bahadur Shah of the Gujarat Sultanate was obliged to sign the Treaty of Bassein with the Portuguese Empire on 23 December 1534. According to the treaty, the seven islands of Bombay, the nearby strategic town of Bassein and its dependencies were offered to the Portuguese. The territories were later surrendered on 25 October 1535.
Document 12: History of science: In Babylonian astronomy, records of the motions of the stars, planets, and the moon are left on thousands of clay tablets created by scribes. Even today, astronomical periods identified by Mesopotamian proto-scientists are still widely used in Western calendars such as the solar year and the lunar month. Using these data they developed arithmetical methods to compute the changing length of daylight in the course of the year and to predict the appearances and disappearances of the Moon and planets and eclipses of the Sun and Moon. Only a few astronomers' names are known, such as that of Kidinnu, a Chaldean astronomer and mathematician. Kiddinu's value for the solar year is in use for today's calendars. Babylonian astronomy was "the first and highly successful attempt at giving a refined mathematical description of astronomical phenomena." According to the historian A. Aaboe, "all subsequent varieties of scientific astronomy, in the Hellenistic world, in India, in Islam, and in the West—if not indeed all subsequent endeavour in the exact sciences—depend upon Babylonian astronomy in decisive and fundamental ways."
Document 13: Sarmad Kashani: Sarmad Kashani or simply as "Sarmad" (ca 1590–1661) was a Persian speaking Armenian mystic and poet who travelled to and made the Indian subcontinent his permanent home during the 17th century. Originally Jewish, he may have renounced his religion to adopt Islam. Sarmad, in his poetry, states that he is neither Jewish, nor Muslim, nor Hindu.
Document 14: History of mathematics: Babylonian mathematics refers to any mathematics of the peoples of Mesopotamia (modern Iraq) from the days of the early Sumerians through the Hellenistic period almost to the dawn of Christianity. The majority of Babylonian mathematical work comes from two widely separated periods: The first few hundred years of the second millennium BC (Old Babylonian period), and the last few centuries of the first millennium BC (Seleucid period). It is named Babylonian mathematics due to the central role of Babylon as a place of study. Later under the Arab Empire, Mesopotamia, especially Baghdad, once again became an important center of study for Islamic mathematics.
Document 15: History of science: From their beginnings in Sumer (now Iraq) around 3500 BC, the Mesopotamian people began to attempt to record some observations of the world with numerical data. But their observations and measurements were seemingly taken for purposes other than for elucidating scientific laws. A concrete instance of Pythagoras' law was recorded, as early as the 18th century BC: the Mesopotamian cuneiform tablet Plimpton 322 records a number of Pythagorean triplets (3,4,5) (5,12,13). ..., dated 1900 BC, possibly millennia before Pythagoras,  but an abstract formulation of the Pythagorean theorem was not.
ground_truth: Islamic mathematics
sub_queries: David Sassoon >> place of birth Answer: Baghdad
What subject was studied in Baghdad ? Answer: Islamic mathematics