拍品专文
The 'incomparable' John Harriot (1560-1621), Sir Walter Raleigh's mathematical tutor, was sent by him to Virginia as a surveyor with Sir Richard Grenville's expedition in 1585. The posthumous publication of his great work on algebra, 10 years after his death, was due to Sir Thomas Aylesbury. 'It virtually gave to algebra its modern form ... He first brought over to one side, and then equated to zero all the terms of an equation; he adverted to the existence of negative roots, improved algebraical notation, and invented the signs of inequality' (DNB).