카테고리 보관물: 해석학
epsilon delta
Who Gave You the Epsilon? Cauchy and the Origins of Rigorous Calculus Judith V. Grabiner, 424 West 7th Street, Claremont, California 91711 http://www.maa.org/pubs/Calc_articles/ma002.pdf
e는 무리수라는 증명
e는 무리수라는 증명을 모아봅니다. http://en.wikipedia.org/wiki/Proof_that_e_is_irrational http://cazelais.disted.camosun.bc.ca/250/e-irrational.pdf e 가 초월수라는 증명 http://en.wikipedia.org/wiki/Transcendental_number#Sketch_of_a_proof_that_e_is_transcendental
엡실론-델타활용
Let f(x) be defined on an interval I=(-1,1) and suppose that f(c)≠0 at some c∈I where f is continuous. Use the ‘ε-δ argument’ to show that there is an interval (c-δ,c+δ)⊂I about c such that f(x)f(c)>0 for every x∈(c-δ,c+δ).