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Matamaitic » Loighic & Tacartheoiric Is ionann idirmhír na dtacar A agus B agus tacar na mball a bhaineann go comhuaineach le A agus le B. [Is mar a chéile é do líon níos mó tacar (fiú do líon éigríochta).]
Mathematics » Logic & Set Theory The intersection (or product) of the sets A and B is the set of elements belonging simultaneously to both A and B. [Similarly, for a greater (even infinite) number of sets.]
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# iolrach dhá thacar · product of two sets