Ash (1998) includes the following areas in his definition of abstract algebra: logic and foundations, counting, elementary number theory, informal set theory, linear algebra, and the theory of linear operators.
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A typical long count date has the following format: Baktun.Katun.Tun.Uinal.Kin. 1  Kin = 1 Day. 2  Uinal = 20 kin = 20 days. 3  Tun = 18 uinal = 360 days. 4  Katun = 20 tun = 360 uinal = 7,200 days. 5  Baktun = 20 katun = 400 tun = 7,200 uinal = 144,000 days.