Explaining Expression 7.3 in Nother's Theorem and Invariance Under Translation

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SUMMARY

The discussion focuses on Expression 7.3 in Nother's Theorem, specifically addressing the transition from the preceding line using the Chasles relation. The Chasles relation facilitates the understanding of integrals by stating that the integral from point A to C can be expressed as the sum of the integral from A to B and the integral from B to C, with the latter potentially negated. This clarification is essential for comprehending the invariance under translation as outlined in Nother's Theorem.

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  • Nother's Theorem
  • Chasles Relation in calculus
  • Integral calculus
  • Understanding of invariance principles
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hawaiifiver
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Hello,

I working through my notes on Nother's theorem and invariance under translation. I don't understand how they get expression 7.3, from the line before 7.3 (see attachment). Can anyone explain.

Thanks.
 

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Hi hawaiifiver !
You mean the part where the Chasles relation is used to get from one line to the other ?
(integral from a to c is integral from a to b + integral from b to c (plus one of those integrals is reverted, that is integral from a to b is 'minus' integral from b to a)) ?
Cheers...
 

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