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The article alludes to this when it mentions Calculus 3 (vector calculus):

× is the cross product.

• is the dot product.

In dimensions higher than 1, they are different.



In Sweden, with scalars, we used vertically centered dot, but even that is pretty uncommon since most of the time, two letters or a letter and a number are mixed and then it is left it out altogether.

This made the x problem much smaller.


In France we use the wedge ∧ for vector cross product.


Then what do you use for the outer product?


Same in Spanish. That gets rid of the problem.


I find it clearer to write dot products using inner product notation 〈,〉rather than \cdot .




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