Can the Risch Algorithm Determine Integrability of Functions Like ∫x^x dx?

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Homework Help Overview

The discussion revolves around the integration of the function x^x, specifically addressing the question of whether it can be expressed in terms of elementary functions. Participants are exploring the implications of the Risch algorithm in determining integrability.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants question the integrability of the function x^x and discuss the limitations of expressing its integral in elementary terms. There is a focus on understanding the Risch algorithm and its role in identifying integrable functions.

Discussion Status

The conversation is ongoing, with some participants expressing skepticism about the integrability of x^x and others seeking clarification on the Risch algorithm's capabilities. No consensus has been reached regarding the function's integrability.

Contextual Notes

Participants are considering the constraints of integrating certain functions and the definitions of elementary functions, as well as the implications of the Risch algorithm in this context.

Maths Lover
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if dy/dx = x^x , find y ?

or

find
∫x^x dx

?
 
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That cannot be integrated in terms of elementary functions.

Where did you get that problem?
 
HallsofIvy said:
That cannot be integrated in terms of elementary functions.

Is there a way enable us to know that a function F can be intergrated in terms of elementary functions or not ?
 

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