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Subject: "Vector Cross Product - Associative Law"

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Conferences The CTK Exchange College math Topic #556
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Reading Topic #556

Richard Smith

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Jan-26-06, 07:30 AM (EST)

"Vector Cross Product - Associative Law"

Suggestion that (AxB)XC = AX(BXC) for 3 dimensional vectors A, B, C (https://www.cut-the-knot.org/do_you_know/mul_vec.shtml) is incorrect, surely.

Richard Smith

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alexb
Charter Member
1753 posts

Jan-26-06, 10:16 AM (EST)

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1. "RE: Vector Cross Product - Associative Law"
In response to message #0

>Suggestion that (AxB)XC = AX(BXC) for 3 dimensional vectors
>A, B, C
>(https://www.cut-the-knot.org/do_you_know/mul_vec.shtml) is
>incorrect, surely.
>
>Richard Smith

I am speechless. The page has been written probably some 10 years ago and I now do not remember under what circumstances. Might have been thinking about bivectors and the exterior product. Either way, it's hard to justify such rude mistake. Many thanks for bringing this up. I am ashamed.

Alex

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