What Are the Key Differences Between Newton and Riemann Integrals?

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Discussion Overview

The discussion centers on the differences between Newton and Riemann integrals, exploring their definitions, relationships, and implications in calculus. Participants examine the foundational aspects of these integrals, particularly in relation to the Fundamental Theorem of Calculus (FTC).

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • Some participants propose that the Newton integral is derived from the Fundamental Theorem of Calculus, while the Riemann integral is a more rigorous definition of the same concept.
  • Others argue that the Newton integral can be viewed as one side of the second FTC, suggesting that both definitions of the integral agree under certain conditions.
  • A participant expresses the view that the Newton integral is less rigorous and more of a "black box" compared to the Riemann integral.
  • One participant raises a challenge regarding the definition of the Newton integral, questioning how to identify a function G such that the integral of f can be expressed as G(b) - G(a), especially when f is not necessarily continuous.
  • Concerns are raised about the difficulty of approximating the Newton integral without relying on the limit of Riemann sums definition.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the definitions and implications of the Newton and Riemann integrals, with multiple competing views and challenges remaining unresolved.

Contextual Notes

Limitations include the dependence on the definitions of integrals and the unresolved nature of how to find a suitable function G for the Newton integral, particularly for functions that are not continuous.

pivoxa15
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What is the difference between the two? Does the Newton integral arise from the fundalmental theorem of calculus and the Riemann integral is the Newton integral but more rigorously defined?
 
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briefly the Newton integral seems to be defined as one side of the second FTC and the riemann integral is the other side, so the FTC seems to say the two definitions of integral agree.
 
That seems to make sense. The Newton integral is like a black box but really the proper one is the Riemann integral.
 
and it is haeder to define. suppsoe f is any function, and i want to define its enwton integral. i havre tot ell you how to recognize a function G such thast the integral of f is G(b) - G(a).

the right answer, if is only riemNN integrable, and not necessarily continuous, is that G is any liposchitz continuous function whosae derivative exists and equals f almost everywhere.

but how do yopum find such a G? and if you cannot find one, how do you approximate the integral?

seems hopeless without the limit of riemann sums definition.
 

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