Integral representation of Euler constan

The first integral is derived from the formula for the gamma function, while the second one is derived from the logarithmic integral function. This leads to the difference in intervals and the transformation of the first integral from exp(-u)lnu to (1-exp(-u))lnu.
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bbailey
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I am working on the integral representation of the Euler-Mascheroni constant and I can't seem to understand why the first of the two integrals is (1-exp(-u))lnu instead of just exp(-u)lnu. It is integrated over the interval from 1 to 0, as opposed to the second integral exp(-u)lnu which is integrated from 1 to infinity. I would appreciate any help on why the first integral is transformed from exp(-u)lnu to (1-exp(-u))lnu. thanks in advance
 
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Related to Integral representation of Euler constan

1. What is the integral representation of Euler's constant?

Euler's constant, also known as the Euler-Mascheroni constant, is represented by the symbol γ and has a numerical value of approximately 0.5772156649. It can be represented as the limit of the difference between the harmonic series and the natural logarithm function as the number of terms approaches infinity.

2. How is Euler's constant related to the natural logarithm?

Euler's constant is closely related to the natural logarithm function, ln(x). In fact, the integral representation of Euler's constant is derived from the integral of ln(x), which is equal to the natural logarithm of the limit of the harmonic series.

3. Why is Euler's constant important in mathematics?

Euler's constant has many important applications in mathematics, particularly in the fields of number theory, analysis, and probability. It appears in various mathematical formulas and has connections to other important constants such as π and e. It also plays a significant role in the study of prime numbers and the Riemann zeta function.

4. How is Euler's constant calculated?

Euler's constant is an irrational number and cannot be calculated exactly. However, it can be approximated to any desired degree of accuracy using numerical methods. It can also be expressed in terms of other constants such as π and e, which have known numerical values.

5. Are there any real-world applications of Euler's constant?

While Euler's constant may seem like an abstract mathematical concept, it does have practical applications in various fields. For example, it is used in physics to model the behavior of gas molecules, in economics to analyze interest rates, and in computer science for random number generation. It also has important implications in the study of prime numbers and the distribution of primes.

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