- #1
yungman
- 5,718
- 241
This might be math problem, but I only see it in EM books.
[tex]\nabla X (\vec A X \vec B) \;=\; (\vec B \cdot \nabla)\vec A - \vec B(\nabla \cdot \vec A) -(\vec A \cdot \nabla)\vec B + \vec A ( \nabla \cdot \vec B) [/tex].
What is [tex] \vec A \cdot \nabla [/tex]?
[tex]\nabla X (\vec A X \vec B) \;=\; (\vec B \cdot \nabla)\vec A - \vec B(\nabla \cdot \vec A) -(\vec A \cdot \nabla)\vec B + \vec A ( \nabla \cdot \vec B) [/tex].
What is [tex] \vec A \cdot \nabla [/tex]?