正成分と負成分
↑ Hazewinkel, Michiel, ed. (2001), “Jordan decomposition (of a signed measure)”, Encyclopedia of Mathematics, Springer, ISBN 978-1-55608-010-4, https://www.encyclopediaofmath.org/index.php?title=Jordan_decomposition_(of_a_signed_measure)
↑ Jordan decomposition - PlanetMath.(英語)