Brahmagupta
Brahmagupta was born c. 598, in Bhillamala, which was located in Northwestern India. The suffix "-gupta" probably indicated that the family belonged to the Vaisya caste (made up of mostly farmers and merchants). He likely lived the majority of his life in Ujjain, India, which at the time was the center of Hindu astronomy and mathematics. There he had access to the best observatory in India as well as the writings of many great scientists and mathematicians who came before him, such as Hero of Alexandria, Ptomely, Diophantus and Aryabhata. In his own work he drew heavily from these sources and often corrected their mistakes.At the age of 30, Brahmagupta wrote his first book, Brahma Sphuta Siddhanta. In 25 chapters this work explains much of his work in astronomy and mathematics. One of his greatest contributions that was revealed with the Brahma Sphuta Siddhanta was the defining of zero. He defined it as the result of subtracting a number from itself. Some of the properties he l
His mathematics was widely used by merchant society during his time and by 700, his work was introduced to the Arabs, who where involved in heavy trade with the Hindu's during that time. The product or quotient of a fortune and a debt is a debt. He also suggested that n divided by zero is n/0, which stated very little. He also completed a second book near the end of his life called Khandakhadyaka. isted follow:When zero is added to a number or subtracted from a number, the number remains unchanged; and a number multiplied by zero becomes zero. We nee the concept of zero when setting certain algebraic equations to zero. Without his work there would be no concept of zero. However, he is still praised for these attempts to further advance mathematical thinking. In a failed attempt to extend these statements to include division by zero Brahmagupta stated that zero divided by zero is zero, which is now known to be wrong today (0/0 is 1). The ideas on negative numbers that he presented are also greatly appreciated in modern mathematics, for without his work on negative numbers we would not be able to use the four quadrants, because negative representations exist in them. Today we use these relations a lot. A debt subtracted from zero is a fortune. He also created rules on how negative numbers relate to positive numbers with multiplication. The product or quotient of two debts is one debt.
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