For mathematician Julia Robinson, who died on this date
in 1985, and her sister Constance Reid, who died on
October 14, 2010—
A search suggested by the "cosmic dippiness" of
a 1998 science fiction novel and by the non-dippiness of
a much better novel with closely related themes from 1977—
(The use of "recursive" here is of course rather poetic, not to be
construed as meaningful in the strictly mathematical sense.
See also the term's etymology, and Working Backwards.)
