I am wondering if there is any standard notation for the element-wise division of vectors.
I am going to use $\oslash$ for this purpose, similar to $\odot$ that is used in some texts for element-wise multiplication. For example, assuming $\vec{u}$ and $\vec{v}$ are vectors of length $k$, then $\vec{x} = \vec{u} \oslash \vec{v}$ if $\vec{x}(i) = \vec{u}(i) / \vec{v}(i)$. Would that be strange to use this in a scientific paper?
Best Answer
I have no idea about standard notations regarding this operation, but I would recommend expressing $$(x_1,\ldots,x_n)\oslash(y_1,\ldots,y_n)$$ instead as $$(x_1,\ldots,x_n)\odot(\tfrac{1}{y_1},\ldots,\tfrac{1}{y_n})$$ After all, the notation $\oslash$ will not make sense unless every $y_i\neq0$.