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745

Centuries: 7th century - 8th century - 9th century

Decades: 690s 700s 710s 720s 730s - 740s - 750s 760s 770s 780s 790s

Years: 740 741 742 743 744 - 745 - 746 747 748 749 750

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Dirichlet character

... positive integer k such that χ(n) = χ(n + k) for all n. This means that the character is periodic with period k. χ(n) = 0 for every n with gcd(n,k) > 1 ...