Sets within sets.........fractal patterns...........the same pattern at different scales.........................in Nature as well as math, the concept in itself is a fractal pattern (self similar throughout)............relativity............is a fractal pattern................the size matters...........an increase in either direction............like Russian dolls..........one in another.................from one vantage point u cannot compare apples and orange..........but from higher up............like when u take them as fruit...........u can......................

Inclusive and Exclusive Sets Tutorial | Sophia Learning

https://www.sophia.org/inclusive-and-exclusive-sets-top

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In this lesson, students are shown the difference between an inclusive set and an exclusive set. Which of the answer choices represents the set of all even numbers between 42 and 51, exclusive? ... explain why the argument is deceptive and if possible identify the type of fallacy it ...

Bracket (mathematics) - Wikipedia

https://en.wikipedia.org/wiki/Bracket_(mathematics)

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Intervals. Both parentheses, ( ), and square brackets, [ ], can also be used to denote an interval. The notation is used to indicate an interval from a to c that is inclusive of but exclusive of . That is, would be the set of all real numbers between 5 and 12, including 5 but not 12.

Interval (mathematics) - Wikipedia

https://en.wikipedia.org/wiki/Interval_(mathematics)

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In mathematics, a (real) interval is a set of real numbers with the property that any number that lies between two numbers in the set is also included in the set. For example, the set of all numbers x satisfying 0 ≤ x ≤ 1 is an interval which contains 0 and 1, as well as all numbers between them.

‎Terminology · ‎Notations for intervals · ‎Properties of intervals · ‎Generalizations