36 Unique factorization domains In Z, we can factor 6 as 2 Â· 3 = 3 Â· 2 = (â2) Â· (â3) = (â3) Â· (â2). In a certain sense,all of these factorizations are the same.Deï¬nition 36.1 Two elements in a ring R are associates if one is a unit of R times theother.
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In both cases the date of Easter can vary by more than a month, falling between March 22nd and April 25th for the Western church, and between April 4th and May 8th for the Eastern church. This in turn determines the dates of public holidays, school holidays and the timings of school terms in many countries.