recursively contains the picture, and so ad infinitum. See also Corecursion Course-of-values recursion Digital infinity A Dream Within a Dream (poem) Droste effect False awakening Fixed point combinator Infinite compositions of analytic functions Infinite loop Infinite regress Infinitism Infinity mirror Iterated function Mathematical induction Mise en abyme Reentrant (subroutine) Self-reference Spiegel im Spiegel Strange loop Tail recursion Tupper's self-referential formula Turtles all the way down References Bibliography - offers a treatment of corecursion. , first chapter on set theory. External links Recursion - tutorial by Alan Gauld Zip Files All The Way Down Nevins, Andrew and David Pesetsky and Cilene Rodrigues. Evidence and Argumentation: A Reply to Everett (2009). Language 85.3: 671--681 (2009) Theory of computation Self-reference Feedback Articles with example C code