# Interior and Exterior Products

1. Dec 20, 2013

### Jhenrique

2. Dec 21, 2013

### tiny-tim

Hi Jhenrique!

The interior product is pretty much the same as in ordinary geometry â€¦

it gives the component (of, say, a force) in a particular direction.​

The exterior product is useful for combining eg two forces or a force and a position â€¦

eg the exterior product of the 2-form (E;B) electromagnetic force with the 1-form r position is the 3-form (E;B) $\wedge$ r whose dual is the 1-form force.