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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Daylight Saving Time (DST) kicks in this weekend, the annual bittersweet sign that spring is on its way, but it hurts your sleep schedule. At 2 a.m. local time on March 8, clocks will spring forward one hour. (Shutterstock). By Drew Tuma. Daylight Saving Time (DST) kicks in this weekend, the annual bittersweet sign that spring is on its way, but it hurts your sleep schedule.