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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At 2 a.m. on the second Sunday in March, we set our clocks forward one hour ahead of Standard Time (Spring forward, even though Spring doesn't begin until late March, over a week after the start of Daylight Saving Time). We Fall back at 2 a.m. on the first Sunday in November by setting our clock back one hour and thus returning to Standard Time.