学过高等数学的人都会记得欧拉常数 r(Euler’sconstant),它表
示的是一个数列的极限, 即 lim(∑ 1
I n*
), 它就是由我们下面将要介绍的18
n→∞ k =1 k
世纪瑞士最著名的数学家列昂纳德·欧拉(Leonhard Euler)于 1740
年提出的,它和 r 函数,黎曼 S
函数以及伯努利数等有密切的关系...
By Henry James
PART I
Four years ago--in 1874--two young Englishmen had occasion to go to the
United States. They crossed the ocean at midsummer, and, arriving in New
York on the f...
TRANSLATED BY HENRY WADSWORTH LONGFELLOW (1807-1882)
CONTENTS
Inferno
I. The Dark Forest. The Hill of Difficulty. The Panther, the Lion, and
the Wolf. Virgil. II. The Descent. Dant...