What do the single bars in the Cauchy-Schwarz equation represent?

  • Thread starter Thread starter zimbabwe
  • Start date Start date
  • Tags Tags
    Cauchy
Click For Summary
SUMMARY

The single bars in the Cauchy-Schwarz equation represent the absolute value or magnitude of a vector. While double bars are conventionally used to denote the length or norm of a vector, single bars are sometimes employed interchangeably in informal contexts. This distinction can lead to confusion, particularly for students who are accustomed to seeing double bars in academic notes. Understanding this notation is crucial for accurately interpreting the Cauchy-Schwarz inequality in quantum computing.

PREREQUISITES
  • Familiarity with the Cauchy-Schwarz inequality
  • Basic understanding of vector norms
  • Knowledge of quantum computing concepts
  • Experience with mathematical notation in linear algebra
NEXT STEPS
  • Review the formal definition of vector norms in linear algebra
  • Study the Cauchy-Schwarz inequality in detail
  • Explore quantum computing applications of the Cauchy-Schwarz inequality
  • Learn about different notations used in mathematical proofs
USEFUL FOR

Students and professionals in mathematics, quantum computing researchers, and anyone looking to deepen their understanding of vector notation and the Cauchy-Schwarz inequality.

zimbabwe
Messages
33
Reaction score
0
I need to write out the proof for the Cauchy-Schwarz equation from quantum computing. I'm stuck on the first step as I don't understand what the single bars on the first term in the equation. Double bars is length but single??


http://en.wikipedia.org/wiki/Cauchy–Schwarz_inequality
 
Physics news on Phys.org
Single bars indicate the absolute value, or magnitude.

For the record, it's not uncommon for people to use single bars to designate the norm (length) of a vector, even though the proper notation is technically double bars.
 
Thanks I was totally stuck, as in all the notes the professor used double bars.
 

Similar threads

  • · Replies 1 ·
Replies
1
Views
3K
Replies
4
Views
2K
Replies
4
Views
2K
  • · Replies 1 ·
Replies
1
Views
5K
Replies
2
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K