# Paper:James Whitbread Lee Glaisher/On certain definite integrals involving the exponential-integral

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## James Whitbread Lee Glaisher: *On certain definite integrals involving the exponential-integral*

Published $1881$, **The Quarterly Journal of Pure and Applied Mathematics**.

### Online copies

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### Contents

Exponential integral Ei

Ei(-x)=-Integral from x to infinity of e^(-t)/t dt

Exponential integral Ei series

Logarithmic integral

Relationship between logarithmic integral and exponential integral