Question regarding Curl and Cross Product

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SUMMARY

The discussion centers on the relationship between the curl in vector calculus and the cross product of the del operator with a vector. The standard formula for a cross product involves determinants calculated as i(det1) - j(det2) + k(det3), while the curl uses the same determinants but represented as i + j + k. The confusion arises from the differing signs in the determinants, particularly the switched order in the j component. The participants clarify that the curl operates similarly to a cross product, emphasizing the importance of understanding the determinant's arrangement.

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I'm studying vector calculus, and have a question about the curl and its relation to a cross product of the del operator and a vector. When doing a standard cross product as the formula I have i(det1) - j(det2) + k(det3), where det1, 2 3 are the appropriate 2x2 determinants. However for the curl it's the same determinants, but i + j + k. I'm wondering what the reason for the difference is?
 
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I don't think you are right in your assertion. Curl operates like any other cross product, and the method of cofactors operates the same way.

Looking at the wikipedia page for curl though, you might get confused by the formula given as it has 3 +s, but notice that the order of the ad-bc is switched in front of the j to bc-ad.
 
Ah, I see what I missed now. Thanks for pointing that out.
 

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