Overlapping sets are those which have some elements in common.
For example, the set of positive multiples of 2 would be {2, 4, 6, 8, 10, 12, 14, ...}
the set of positive multiples of 3 would be {3, 6, 9, 12, 15, ...}
Their overlap (intersection) is the set of all positive multpiles of 6 ie {6, 12, 18, ...}
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In America it is math, in most European countries it is maths
Yes, math is called maths in Welsh.
you have to pick Maths for GCSE's but you can also pick additional maths which is just more maths than normal eg you may have 5 peroids of maths a week but with additional maths you may have 9 peroids of Maths a week
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.
not "maths sequences" it's "mathematical sequence" In mathematics, a sequence is an ordered list of objects (or events). Like a set, it contains members (also called elements or terms), and the number of terms (possibly infinite) is called the length of the sequence. Unlike a set, order matters, and the exact same elements can appear multiple times at different positions in the sequence