THEOREM

[ Mathematics; Fermat's ] Four substantial Autograph Letters Signed and one APC Signed "J.M. Child" to "Sir Richard [Harington]", on mathematical themes including Fermat's.

Author: 
J.M. Child, Mathematician [James Mark Child; History of Mathematics ]
Publication details: 
Camford, Llandulais, North Wales.,10 February to 15 November 1947.
£750.00

Five letters and a postcard, two letters 8vo (total 4pp.), three 4to (total 17 pages), fold marks, good condition. LETTER ONE (6pp., 4to,, 10 Feb.) He starts, "You've done it!!! | I told you that one of your ideas would bear fruit one of these days, and it was a mistaken statement, at least one I think is mistaken, that set me off on a new track which led to success.

[ William Marrat, mathematician and topographer. ] Autograph Letter Signed ('Wm. Marrat'), asking Professor Robert Wodehouse of Cambridge to give his opinion of his 'demonstration of the Binomial Theorem', which is included in the letter.

Author: 
William Marrat (1772-1852), mathematician and topographer [ Robert Woodhouse (1773-1827), Plumian Professor of Astronomy at the University of Cambridge ]
Publication details: 
54 Copperas Hill, Liverpool. 20 July 1822.
£220.00

3pp., 4to. Bifolium. In good condition, on lightly aged-paper, with small piece torn from second leaf. Addressed, with postmark, on reverse of second leaf, to 'Robt. Woodhouse Esqr. A.M. | Plumian Professor of Astronomy & Experimental Philosophy, | Cambridge'. He writes: 'I have just made out the following demonstration of the Binomial Theorem, & as it is very short, & quite elementary, I shall be extremely obliged if you will condescent [sic] to honour me with your opinion of it before I make it public.' A full two pages of calculations, in a smallish hand, follow.

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