It's called an Interpunct.
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multiplication
A vector rotation in math is done on a coordinate plane.2D vectors can be rotated using the cross and dot product.3D vectors are rotated using matrix based quaternion math.
The dot-product and cross-product are used in high order physics and math when dealing with matrices or, for example, the properties of an electron (spin, orbit, etc.).
"dot dot dot" is an ellipsis. It means that the number continues in the way shown to infinity. For instance, the decimal 0.33333... which results from 1/3 carries on giving 3s forever. This cannot be written, obviously, so you write the ellipsis instead. This is also true if a pattern is more than just one number, 23/99 gives the decimal 0.232323.... where the dots represent how the 2323 pattern continues forever.
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