Robert Recorde

Enlarge picture
Robert Recorde 1510 - 1558


Robert Recorde (c. 15101558) was a Welsh physician and mathematician. He introduced the "equals" sign (=) in 1557.

A member of a respectable family of Tenby, Wales, he entered the University of Oxford in about 1525, and was elected a fellow of All Souls College 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, as he had done prior to going to Cambridge. It appears that he afterwards went to London, and acted as physician to King Edward VI and to Queen Mary, to whom some of his books are dedicated. He was also controller of the Royal Mint. After being sued for defamation by a political enemy, he was arrested for debt and died in the King's Bench Prison, Southwark, in 1558.

Recorde published several works upon mathematical subjects, chiefly in the form of dialogue between master and scholar, such as the following:
  • The Grounde of Artes, teachings the Worke and Practise, of Arithmeticke, both in whole numbers and fractions (c. 1540), the first English book on algebra.
  • The Pathway to Knowledge, containing the First Principles of Geometry ... bothe for the use of Instrumentes Geometricall and Astronomicall, and also for Projection of Plattes (London, 1551)
  • The Castle of Knowledge, containing the Explication of the Sphere both Celestiall and Materiall, etc. (London, 1556)
  • The Whetstone of Witte, which is the second part of Arithmetike, containing the Extraction of Rootes, the Cossike Practice, with the Rules of Equation, and the Woorkes of Surde Numbers (London, 1557). This was the book in which the equals sign was introduced].
  • a medical work, The Urinal of Physic (1548), frequently reprinted.
Sherburne states that Recorde also published Cosmographiae isagoge, and that he wrote a book De Arte faciendi Horologium and another De Usu Globorum et de Statu temporum. Recorde's chief contributions to the progress of algebra were in the way of systematizing its notation.

See also

References

External links

15th century - 16th century - 17th century
1480s  1490s  1500s  - 1510s -  1520s  1530s  1540s
1507 1508 1509 - 1510 - 1511 1512 1513

:
Subjects:     Archaeology - Architecture -
..... Click the link for more information.
1558 in other calendars
Gregorian calendar 1558
MDLVIII
Ab urbe condita 2311
Armenian calendar 1007
ԹՎ ՌԷ
Bah' calendar -286 – -285
Buddhist calendar 2102
..... Click the link for more information.

..... Click the link for more information.
physician applies to a person who practices some type of medicine. Such medical practitioners are concerned with maintaining or restoring human health through the study, diagnosis and treatment of disease and injury, through both an area of knowledge
..... Click the link for more information.
mathematician is a person whose primary area of study and research is the field of mathematics.

Problems in mathematics

Some people incorrectly believe that mathematics has been fully understood, but the publication of new discoveries in mathematics continues at an immense
..... Click the link for more information.
The equal sign, equals sign, or "=" is a mathematical symbol used to indicate equality. It was invented in 1557 by Welshman Robert Recorde.
..... Click the link for more information.
15th century - 16th century - 17th century
1520s  1530s  1540s  - 1550s -  1560s  1570s  1580s
1554 1555 1556 - 1557 - 1558 1559 1560

:
Subjects:     Archaeology - Architecture -
..... Click the link for more information.
Tenby (Welsh: Dinbych-y-Pysgod, "little town of the fishes or little fortress of the fish") is a walled seaside town in Pembrokeshire, West Wales, lying on Carmarthen Bay, and is a popular seaside holiday resort.
..... Click the link for more information.
University of Oxford (usually abbreviated as Oxon. for post-nominals, from "Oxoniensis"), located in the city of Oxford, England, is the oldest university in the English-speaking world.
..... Click the link for more information.
All Souls College (in full: The Warden and College of the Souls of all Faithful People deceased in the University of Oxford[1]) is one of the constituent colleges of the University of Oxford in England.
..... Click the link for more information.
15th century - 16th century - 17th century
1500s  1510s  1520s  - 1530s -  1540s  1550s  1560s
1528 1529 1530 - 1531 - 1532 1533 1534

:
Subjects:     Archaeology - Architecture -
..... Click the link for more information.
University of Cambridge (often Cambridge University), located in Cambridge, England, is the second-oldest university in the English-speaking world and has a reputation as one of the world's most prestigious universities.
..... Click the link for more information.
London
Canary Wharf is the centre of London's modern office towers
London shown within England
Coordinates:
Sovereign state United Kingdom
Constituent country England
..... Click the link for more information.
Edward VI
Edward VI

Reign 28 January 1547–6 July 1553
Born 12 September 1537(1537--)
Hampton Court Palace
Died 6 July 1553 (aged 17)
Greenwich Palace

..... Click the link for more information.
Mary I (18 February, 1516 – 17 November, 1558), also known as Mary Tudor, was Queen of England and Queen of Ireland from 6 July1553 (de facto) or 19 July 1553 (de jure) until her death on 17 November, 1558.
..... Click the link for more information.
The Royal Mint is the body permitted to manufacture, or mint, coins in the United Kingdom of Great Britain and Northern Ireland.

The Royal Mint originated over one thousand years ago, but it has functioned since 1975 as a 'Government Trading Fund', operating in much
..... Click the link for more information.
King's Bench Prison was a prison situated in the Southwark area of central London, England from medieval times until its final closure in 1880. It took its name from the King's Bench court of law in which cases of defamation, bankruptcy and other misdemeanours were heard; as such,
..... Click the link for more information.
Southwark
The Borough


..... Click the link for more information.
Robert Recorde's Arithmetic: or, The Ground of Arts was one of the first printed English textbooks on arithmetic and the most popular of its time. It was preceded only by two anonymous texts in 1537 and 1539; The Ground of Arts
..... Click the link for more information.
The equal sign, equals sign, or "=" is a mathematical symbol used to indicate equality. It was invented in 1557 by Welshman Robert Recorde.
..... Click the link for more information.
equal if and only if they are precisely the same in every way. The complementary notion is distinctness. This defines a binary relation, equality, denoted by the sign of equality "=" in such a way that the statement "x = y" means that x
..... Click the link for more information.
The zenzizenzizenzic of a number is its eighth power. This term was suggested by Robert Recorde, a 16th century Welsh writer of popular mathematics textbooks, in his work The Whetstone of Witte, published in 1557, although his spelling was zenzizenzizenzike.
..... Click the link for more information.
Several mathematicians who have made contributions to the development of mathematics have hailed from the country of Wales.
  • Robert Recorde, sixteenth-century inventor of the equals sign was from Tenby.

..... Click the link for more information.
St Mary's Church, Tenby is a church located in the centre of the town of Tenby in Pembrokeshire, western Wales. The church is in the Diocese of Saint David's within the Church in Wales, and members of the Anglican Communion.
..... Click the link for more information.


This article is copied from an article on Wikipedia.org - the free encyclopedia created and edited by online user community. The text was not checked or edited by anyone on our staff. Although the vast majority of the wikipedia encyclopedia articles provide accurate and timely information please do not assume the accuracy of any particular article. This article is distributed under the terms of GNU Free Documentation License.