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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The total number of days between Thursday, January 1st, 2015 and Tuesday, June 30th, 2015 is 180 days.This is equal to 5 months and 29 days. This does not include the end date, so it's accurate if you're measuring your age in days, or the total days between the start and end date.80 days is equal to 25 weeks and 5 days. The total time span from 2015-01-01 to 2015-06-30 is 4,320 hours. This is equivalent to 259,200 minutes. You can also convert 180 days to 15,552,000 seconds.