A join and meet are binary operations on the elements of a POSET, or partially ordered set. A join on a set is defined as the supremum with respect to a partial order on the set, provided it exists. A meet on a set is defined either as the unique infimum with respect to the partial order imposed on the set, if the infimum exists.
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division
What symbol
oz = ounce
In maths, something that is quadratic is squared. So a quadratic equation will have X squared in it.
The word "quad" mean four (4).