Limerick: The Dirichlet Function
A limerick that asks you to graph the function that's 1 on the rationals and 0 on the irrationals.
Use this cartoon
Free for classrooms, worksheets, slides and other non-commercial use under CC BY-NC 4.0, with credit to Ben Orlin.
Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2017-03-15-limericks-for-mathematicians--limerick-the-dirichlet-function/ (CC BY-NC 4.0)Transcript
"If you get a kick out of math, / this function is good for a laugh: / on the rationals, 1; / on irrationals, none. / Now think… and then draw me its graph." [f(x) = 1 if x rational, 0 if x irrational]