Search results
Results from the WOW.Com Content Network
Algebra is the branch of mathematics that studies certain abstract systems, known as algebraic structures, and the manipulation of expressions within those systems. It is a generalization of arithmetic that introduces variables and algebraic operations other than the standard arithmetic operations, such as addition and multiplication.
This principle, foundational for all mathematics, was first elaborated for geometry, and was systematized by Euclid around 300 BC in his book Elements. [ 21 ] [ 22 ] The resulting Euclidean geometry is the study of shapes and their arrangements constructed from lines, planes and circles in the Euclidean plane ( plane geometry ) and the three ...
The Kutub al-Sittah are a collection of six books, regarded as the most authentic reports in Sunni Islam. Among them is Sahih al-Bukhari, often considered by Sunnis to be one of the most authentic sources after the Quran. [68] Another well-known source of hadiths is known as The Four Books, which Shias consider as the most authentic hadith ...
Hydraulic jump in a rectangular channel, also known as classical jump, is a natural phenomenon that occurs whenever flow changes from supercritical to subcritical flow. In this transition, the water surface rises abruptly, surface rollers are formed, intense mixing occurs, air is entrained, and often a large amount of energy is dissipated.
When students typed in a numeric answer to a question, they could use operators and variables and standard algebraic notation, and the program would use the TUTOR "compute" command to compile and run the formula and check that it was numerically equivalent (or within the floating point roundoff error) to the correct answer.
In May 2013, Coursera announced free e-books for some courses in partnership with Chegg, an online textbook-rental company. Students would use Chegg's e-reader, which limits copying and printing and could use the book only while enrolled in the class. [75]
In June 2018, Gates offered free ebooks, to all new graduates of U.S. colleges and universities, [162] and in 2021, offered free ebooks, to all college and university students around the world. [ 163 ] [ 164 ] The Bill & Melinda Gates Foundation partially funds OpenStax , which creates and provides free digital textbooks. [ 165 ]
Chess is a board game for two players. It is sometimes called international chess or Western chess to distinguish it from related games such as xiangqi (Chinese chess) and shogi (Japanese chess).