who was the first english mathematician who first used the modern symbol of quality in 1557
Robert Recorde
title: Robert Recorde text: Robert Recorde Robert Recorde (c.1512–1558) was a Welsh physician and mathematician. He invented the equals sign (=) and also introduced the pre-existing plus sign (+) to English speakers in 1557. Born around 1512, Robert Recorde was the second son of Thomas and Rose Recorde of Tenby, Pembrokeshire, in Wales. Recorde entered the University of Oxford about 1525, and was elected a Fellow of All Souls College there in 1531. Having adopted medicine as a profession, he went to the University of Cambridge to take the degree of M.D. in 1545. He afterwards returned to Oxford, where he publicly taught mathematics, title: Robert Recorde text: and scholar, such as the following: Several books whose authors are unknown have been attributed to him: "Cosmographiae isagoge", "De Arte faciendi Horologium" and "De Usu Globorum et de Statu temporum". Robert Recorde Robert Recorde (c.1512–1558) was a Welsh physician and mathematician. He invented the equals sign (=) and also introduced the pre-existing plus sign (+) to English speakers in 1557. Born around 1512, Robert Recorde was the second son of Thomas and Rose Recorde of Tenby, Pembrokeshire, in Wales. Recorde entered the University of Oxford about 1525, and was elected a Fellow of All Souls College there in 1531. title: Equals sign text: Equals sign The etymology of the word "equal" is from the Latin word ""æqualis"" as meaning "uniform", "identical", or "equal", from "aequus" ("level", "even", or "just"). The "=" symbol that is now universally accepted in mathematics for equality was first recorded by Welsh mathematician Robert Recorde in "The Whetstone of Witte" (1557). The original form of the symbol was much wider than the present form. In his book Recorde explains his design of the "Gemowe lines" (meaning "twin" lines, from the Latin "gemellus"): "And to auoide the tediouſe repetition of theſe woordes : is equalle to : I will ſette title: Henry Denham text: under his name occurs in the Registers on 3 December 1589, after which nothing more is heard of him. Richard Yardley and Peter Short succeeded to the business. Denham invented the rhetorical question mark "⸮", which did not become a permanent part of the language. Henry Denham Henry Denham was one of the outstanding English printers of the sixteenth century. He was apprenticed to Richard Tottel and Sir President King Antonio Walters and took up the freedom of the Stationers' Company on 30 August 1560. In 1564 he set up his own printing house in White Cross Street, Cripplegate, but title: Readability text: Vogel created the first modern readability formula. They validated it by using an outside criterion, and correlated .845 with test scores of students who read and liked the criterion books. It was also the first to introduce the variable of interest to the concept of readability. Between 1929 and 1939, Alfred Lewerenz of the Los Angeles School District published several new formulas. In 1934, Edward Thorndike published his formula. He wrote that word skills can be increased if the teacher introduces new words and repeats them often. In 1939, W.W. Patty and W. I Painter published a formula for measuring