Editing FunFact
ProfessorSu's Fabulous Fun Facts! Find them at http://www.math.hmc.edu/funfacts/ --------- From an AnalExam: Remove all numbers from the harmonic series whose denominators contain the digit 0 in their decimal representations. The resulting series converges to a number less than 90. ''I believe AndrewSchoonmaker found a cute proof of this.'' ''Unfortunately, said cute proof (a) requires assuming that the series converges and (b) often confuses people. Oh well.'' ---- Every polyhedron of genus zero has at least one face with strictly fewer than six edges. ''Hint: Think GraphTheory.''
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Editing FunFact