olemus
hulkadest \(A_1, A_2, A_3, \ldots\)
moodustatud hulk \(A_1\cap A_2\cap A_3\cap \ldots = \cap_i A_i\) ,
mis koosneb hulkade \(A_1, A_2, A_3, \ldots\)
ühistest elementidest, st \(\cap_i A_i = \{a\colon\; \forall i\colon a\in A_i \}\)
=
the set of elements which are common to all given sets

ülevaateid
https://www.mathsisfun.com/definitions/intersection-sets-.html

https://en.wikipedia.org/wiki/Intersection_(set_theory)

https://math-garden.com/wp-content/uploads/2020/08/nst_0_unions_1_0_2.pdf

vt ka
- hulkade ühend