Unfamiliar Notation: \bigcup & \bigcap Explained

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SUMMARY

The discussion focuses on the mathematical notations \bigcup and \bigcap, specifically in the context of sequences and summations. The user defines the sets Ai as {i, i + 1, i + 2, ...} for i = 1, 2, ... and seeks clarification on the meanings of the infinite union and intersection of these sets. The notation \bigcup A_i represents the union of all sets A_i, while \bigcap A_i denotes the intersection of these sets. The user confirms understanding of the basic definitions of union and intersection but requires context for their application in sequences.

PREREQUISITES
  • Understanding of set theory concepts, specifically union and intersection.
  • Familiarity with sequences and their notation.
  • Basic knowledge of mathematical notation and symbols.
  • Ability to interpret mathematical expressions involving limits and infinity.
NEXT STEPS
  • Research the properties of infinite unions and intersections in set theory.
  • Study examples of sequences and their corresponding unions and intersections.
  • Explore the implications of \bigcup and \bigcap in real analysis.
  • Learn about the applications of these notations in mathematical proofs and theorems.
USEFUL FOR

Students of mathematics, educators teaching set theory, and anyone looking to deepen their understanding of mathematical notation in sequences and summations.

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Homework Statement



Having trouble recognizing this notation.
Let Ai = {i, i + 1, i + 2, . . . } for i = 1, 2, . . . . What
are:


\bigcup A (subscript i)
i=1

and


\bigcap A (subscript i)
i=1

Homework Equations


I know what the \bigcup or \bigcap notation means in sets and subsets, but not in sequences and summations.

The Attempt at a Solution



I don't need it explained, I simply need to know what the \bigcup and \bigcap stands for so I can read up on them. Thanks guys. I can also upload the pdf attachment if needed.
 
Last edited:
Physics news on Phys.org
\bigcup - union - A1 U A2 U ... U An
\bigcap - intersection - same as above but with the intersection symbol
 
Thanks.
 

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