such that 
for all values of 
where 
is any integer and 
is a constant. The smallest (non-zero) value of for which this relation holds true is known as the period of the function. [M1.6, M5.2, M6.3]
is: a function such that for all values of where is any integer and is a constant. The smallest (non-zero) value of for which this relation holds true is known as the period of the function. [M1.6, M5.2, M6.3]
Copyright 1997, The Open University