Vector Calculus - Tensor Identity Problem

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SUMMARY

The discussion centers on a student's struggle with vector calculus, specifically regarding tensor identities and the application of the scalar product between vectors. The student attempts to relate the cross product and dot product but lacks guidance due to insufficient examples provided by the professor. The scalar product formula, 𝑎⋅𝑏=∑𝑖𝑎𝑖𝑏𝑖, is highlighted as a crucial component in understanding the relationship between the two products.

PREREQUISITES
  • Understanding of vector calculus concepts
  • Familiarity with tensor identities
  • Knowledge of cross product and dot product operations
  • Ability to manipulate mathematical expressions involving summation
NEXT STEPS
  • Study the properties of tensor identities in vector calculus
  • Learn the applications of the scalar product in physics and engineering
  • Explore examples of cross product and dot product in three-dimensional space
  • Review vector calculus textbooks for additional practice problems
USEFUL FOR

Students of vector calculus, educators seeking to provide clearer examples, and anyone preparing for advanced mathematics exams will benefit from this discussion.

mille2eo
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Homework Statement



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Homework Equations


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The Attempt at a Solution



I am really lost here because our professor gave us no example problems leading up to the final exam and now we are expected to understand everything about vector calculus.

upload_2016-12-7_18-53-52.png


This is my attempt at the cross product and dot product written out. I don't know how to proceed to make the left hand side equal the right hand side.
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Physics news on Phys.org
Use the expression for the scalar product between two vectors ##\mathbf{a}## and ##\mathbf{b}##:
$$\mathbf{a}\cdot\mathbf{b}=\sum_i a_i b_i $$
 

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