Robert Recorde

Awgrymer ha medhek kembrek o Robert Recorde (a-dro dhe 1512 – 1558). Ev o an kynsa dhe usya an kehavalnos, ha henna yn 1557. Ev ynwedh o an kynsa dhe wul devnydh a’n arwodh addyans.

Robert Recorde
Genys	c. 1510  Dinbych-y-pysgod
Mernans	1558  Loundres
Kenedhlogeth	Kembra
Alma mater	Pennskol Kergront Pennskol Rysoghen
Galwesigeth	awgrymer, medhek, filosofer
Arvether	All Souls College Pennskol Kergront Royal Mint
Aswonnys rag	The Whetstone of Witte, The Ground of Arts, The Castle of Knowledge

Genys veu dhe deylu mas yn Dinbych-y-Pysgod, Konteth Penvro, hag yth eth yn rag dhe studhya yn pennskolyow Rysoghen ha Kargront.

Am gehavalen gynsa bythkweth, gans Records, a styri: 14x+15=71 hedhyw.

Ev a removas dhe Loundres avel medhek, ha leverir bos an myghtern ha myghternes ynmysk y berthyoryon. Apoyntys veu avel dyghtyer an vathva yn Bristol yn 1549. Koweth o dhe’n awgrymer, alkemydh ha skolheyg kembrek John Dee.

Y ferwis yn prison Bynk an Myghtern yn Southwark, wosa ev dhe vos aberth yn kenbdon.

Recorde ow komendya an kehavalnos "="

Lyvrow

• The Grounde of Artes, teachings the Worke and Practise, of Arithmeticke, both in whole numbers and fractions (c. 1540)
• 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 (Llundain, 1551)
• The Castle of Knowledge, containing the Explication of the Sphere both Celestiall and Materiall, etc. (Llundain, 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 workes of Surde Numbers. (Llundain, 1557). Dyma'r llyfr a gyflwynodd yr hafalnod a'r llyfr Saesneg cyntaf ar algebra.
• The Urinal of Physick; Reynolde Wolfe; Llundain (1548).