dudley langford (3 resultados)

LeatherBound. Condición: New. BOOKS ARE EXEMPT FROM IMPORT DUTIES AND TARIFFS; NO EXTRA CHARGES APPLY. Leatherbound edition. Condition: New. Leather Binding on Spine and Corners with Golden leaf printing on spine. Bound in genuine leather with Satin ribbon page markers and Spine with raised gilt bands. Pages: 230. A perfect gift for your loved ones. Reprinted from 1872 edition. NO changes have been made to the original text. This is NOT a retyped or an ocr'd reprint. Illustrations, Index, if any, are included in black and white. Each page is checked manually before printing. As this print on demand book is reprinted from a very old book, there could be some missing or flawed pages, but we always try to make the book as complete as possible. Fold-outs, if any, are not part of the book. If the original book was published in multiple volumes then this reprint is of only one volume, not the whole set. IF YOU WISH TO ORDER PARTICULAR VOLUME OR ALL THE VOLUMES YOU CAN CONTACT US. Resized as per current standards. Sewing binding for longer life, where the book block is actually sewn (smythe sewn/section sewn) with thread before binding which results in a more durable type of binding. Language: English Pages: 230.

Langford trained as an industrial chemist and was a member of Royal Chemical Society. In later life he turned to mathematics, and published thirty articles in the Mathematical Gazette. One of these ('Problem') appeared in 1958 and concerned what came to be known as the Langford Sequence. Its significance is discussed by Martin Gardner, in his 'Mathematical Magic Show' (1978). Both items aged and creased, with closed tears, but with text complete and legible. Both are addressed to 'Dear Sir Richard' and signed 'C Dudley Langford'. ONE: 3pp, 12mo. On two leaves. After thanking him for his 'Letter Card' he writes: 'I like the proof. The thing that I think astonishes everyone is that the converse of such an early theorem should prove to be such a hard nut to crack and require such things as cyclic qudrilaterals etc!' After a short speculation on this question he writes: 'I'll see what I can do - - but five or six years of pain from my wrist have reduced me to pretty poor state mentally! I don't think I honestly could have taken even half a dozen aspirins etc in the last four years; yet I've taken enough to affect my head very seriously (My heart is so pharmaceutically good that it is untouched!)' He continues discussing his incapacity, before noting: 'One curious effect of the continuous pain is that, at times, I feel quite light headed and wonder, afterwards, what the shop assistants think! I hope, anyhow, that they realise its my wrist making me not know quite what I'm doing. Sometimes I have to ask them to pack the things in the basket for me as I just cannot manage it myself'. He ends by proposing that they both work on 'a proof based on early work', and let one another know about the results. TWO: 3pp, 16mo. He lays something that 'may be well known to specialists, but if you don't know it, it may interest you'. He explains that he 'noticed about 10 years ago that the 9th and 5th terms of mutations ended in the same digits as the numbers themselves. One night recently I was woken by the pain in my wrist and it dawned on me that, if one substituted the original number one would get something ending in O, ie a multiple of 10.' He gives a page and a half of mathematical calculations, including one arrived at with 'a hint from Mr Broadbent' (i.e. Thomas Alan Arthur Broadbent). He ends by apologising for his handwriting, with further reference to his 'fractured wrist': 'There is a good chance, therefore, that I shall never again be able to write legibly, be free from pain, able to dress myself unaided or even use a walking stick!' Accompanying the letters is a printed 'Programme for the Annual Meeting East, 1949' of the Mathematical Association (3pp, 16mo; bifolium).

16 Autograph Letters Signed, 10 Autograph Cards Signed and one Typed Letter Signed. The letters total 32pp. The collection is in fair condition, on aged and worn paper. The correspondence deals exclusively with mathematical questions raised in the Mathematical Gazette, with the writers providing mathematical calculations and demonstrations. From six individuals, as follows. ONE: T.A.A. Broadbent [ Thomas Arthur Alan Broadbent ] (1903-1973) of the Royal Naval College, Greenwich: 4 ALsS and 3 ACsS. TWO: G.A. Garreau [ Gabriel Armand Garreau ]: 2 ALsS and one TLS. THREE: C. Dudley Langford (see 'Langford's Problem') of Henrietta Cottage, 16 Henrietta Street, Girvan, Ayrshire: 2 ALsS and 2 ACsS. FOUR: T.B.W. Spencer (author of 'Mathematical Problem Papers') of 35 The Downs, Wimbledon: one ALS. FIVE: A.S. Gosset Tanner [ Arthur Spencer Gosset-Tanner ], master at Derby School: 5 ACsS and 2 ALsS. SIX: J. Travers, Headmaster, Peterborough College, Harrow: 5 ALsS. Also present is a Typed Letter Signed by 'Ripley' (i.e. on behalf of Robert Ripley's American franchise), on letterhead of the Sunday Express, 3 January 1940: 'Your interesting problem of the three numbers has been noted, and will be included in "Believe it or Not" at an early date.' From the Harington family papers, the recipient being Sir Richard Dundas Harington, 13th Baronet (1900-1981), whose address is given as The Brook, Lower Howsell, Malvern Link, Worcestershire.