The verse "Great fleas have little fleas upon their backs to bite em, little fleas have lesser fleas and so ad infinitum" is actually part of a longer poem called "Infantiae" by the British mathematician and poet Augustus De Morgan. De Morgan was a prominent figure in the field of mathematics in the 19th century, known for his work in logic and algebra. This particular verse is often used to illustrate the concept of infinite regression, where a pattern repeats itself indefinitely. In this case, the image of fleas and their smaller counterparts biting each other in a never-ending cycle serves as a metaphor for the idea that there is always something smaller or more detailed to be found within a given system. De Morgan's work, including "Infantiae," is still studied and referenced in mathematical and philosophical circles today. His contributions to the field of mathematics have had a lasting impact on the way we understand complex systems and patterns. If you're interested in learning more about Augustus De Morgan and his work, you can visit the website of the De Morgan Foundation, which is dedicated to preserving and promoting his legacy. They have a wealth of information on De Morgan's life and contributions to mathematics, as well as resources for further study. Overall, the verse "Great fleas have little fleas upon their backs to bite em, little fleas have lesser fleas and so ad infinitum" is a clever and thought-provoking way to illustrate the concept of infinite regression. It serves as a reminder that there is always more to discover and explore within any given system, no matter how small or seemingly insignificant it may appear at first glance.

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