'''Author's Note.''' This section consists of very rough working notes that resided at the ends of my old disk files for this essay. Most of this material is superseded by later work, in particular, by the paper, "[[Differential Logic And Dynamic Systems]]".
+
'''Author's Note.''' This section consists of very rough working notes that resided at the ends of my old disk files for this essay. Most of this material is superseded by later work, in particular, by the paper, “[[Differential Logic And Dynamic Systems]]”.