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I've changed the title to use plural nouns. I suspect that whoever named this page with singulars failed to understand the contexts in which the phrase differential equations is singular, and similarly dynamical systems. Michael Hardy 23:16, 9 Jun 2005 (UTC)
Delay differential equations or retarded functional differential equations should be added to the list of topics. — Preceding unsigned comment added by 18.104.22.168 (talk) 23:43, 7 February 2016 (UTC)