"nanban-buki", developed by soga riemon, the founders of the sumitomo group in keicho era (1596 to1615). toyo smelter & refinery (saijo city, ehime prefecture) boasts the world's highest-level productivity. technologies used inthe toyo smelter & refinery are also utilized in china. for jinlong copper...
given the wikipedia definition of partition of a set: a partition of a set $x$ is a set of non-empty subsets of $x$ such that every element $x$ in $x$ is in exactly one of these subsets (i.e., $x$... elementary-set-theory notation set-partition asked feb at : matthiash bronze badges votes answer views...
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