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What's the difference between a wedge product and a cross product?

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- Thread starter closet mathemetician
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- #1

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What's the difference between a wedge product and a cross product?

- #2

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the wedge product of two vectors is a bivector (a 2-index tensor);

the cross product of two vectors is another [psuedo] vector.

- #3

matt grime

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x/\y is always defined for all x,y in any vector space, they just live in the space /\^2(V). It so happens that in the case when dim(V)=3, then /\^2(V) is (non-canonically) isomorphic to V, so people identify them, and call the resulting thing the cross product.

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