almost-periodic function


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almost-periodic function

[′ȯl‚mōst ‚pir·ē′äd·ik ′fəŋk·shən]
(mathematics)
A continuous function f (x) such that for any positive number ε there is a number M so that for any real number x, any interval of length M contains a nonzero number t such that | f (x + t) -f (x)|<>