The book Harmonic Functions was written by author Byerly, William Elwood, B. 1849 Here you can read free online of Harmonic Functions book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Harmonic Functions a good or bad book?
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psinh ^ sinh^ -| 4 ^ . nx I a_ . ^nx is the required solution, for it reduces to i when y ^ b. See (7), Art. 6. _y = O w. hen X = o, y = o n x^l, dy It t = o, y =^/x ti t — o. APPLICATIONS OF TRIGONOMETRIC SERIES. 39 {p) A harp-string is initially distorted into a given plane curve and then released ; find its motion. The differential equation for the small transverse vibrations of a stretched elastic string is as stated in Art. i. Our conditions if we take one end of the string as origin are (...2) (3) (4) (5) Using the method of Art. 3, we easily get as particular solutions of (I) ■y = sin fix sin a fit, y = sin fix cos afit, y = cos fix sin afii, and y = cos fix cos a fit y = sin —J- cos— ^ satisfies (i), (2), (3), and (4), ,— - . mnx mnat k-^ y = ^a„, sin —1— cos — ^— , (o) where «'» = 7 fA^) sin ^7^ • ^^ (?) is our required solution ; for it reduces to/"(j^) when if = 0. See Art. 9. Prob. 13. Three edges of a square sheet of tinfoil are kept at potential zero, and the fourth at potential unity ; at what potential is the centre of the sheet ?
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