Infinitesimal angular displacement ?

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SUMMARY

The discussion centers on proving that infinitesimal angular displacement is a vector while questioning the vector nature of non-infinitesimal angular displacements. Participants emphasize the importance of vector properties, such as commutativity, in establishing these proofs. The conversation suggests that existing proofs are unsatisfactory, prompting a search for a more coherent mathematical demonstration. The focus is on the mathematical characteristics that define vectors in the context of angular displacement.

PREREQUISITES
  • Understanding of vector properties, including commutativity and linearity.
  • Familiarity with angular displacement concepts in physics and mathematics.
  • Basic knowledge of calculus, particularly infinitesimals.
  • Experience with mathematical proof techniques.
NEXT STEPS
  • Research the mathematical properties of vectors in detail.
  • Explore the concept of infinitesimals in calculus.
  • Study existing proofs of angular displacement as a vector.
  • Investigate alternative mathematical frameworks that address vector definitions.
USEFUL FOR

Students in physics and mathematics, educators seeking to clarify vector concepts, and anyone interested in the mathematical foundations of angular displacement.

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How can we proved that the infinitesimal angular displacement is a vector mathematically ?

Or~how can we prove that a non-infinitesimal angular displacement is not a vector ?
 
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This sounds suspiciously like a homework question. If it is, it should really go in the "Homework and Coursework" section.

I'll get you started on this problem: what are the properties of vectors? Do non-infinitesimal angular displacements obey these properties? How about infinitesimal displacements?
 
It's NOT a homework first ~

And I am not satisfied with the proof I saw before ~

The proof I saw is based on the commutative of a vector ~

I'm now seeking for a new proof which make sense!
 

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