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 Oct 28 comment We know the dimension of the Koch snowflake's perimeter, but does it have a measure? Relevant I think? So, it is quite difficult indeed? dx.doi.org/10.1016/j.amc.2007.01.046 Oct 28 revised We know the dimension of the Koch snowflake's perimeter, but does it have a measure? Oops I meant the third vertex - clearly a triangle's sides, let alone its interior, contain infinitely many points. Oct 28 asked We know the dimension of the Koch snowflake's perimeter, but does it have a measure? Oct 28 revised How is a system of axioms different from a system of beliefs? Mention that although counting isn't as factual as it may seem, counting isn't broken either. Oct 28 answered How is a system of axioms different from a system of beliefs? Aug 5 comment Find the smallest $n$ such that the digits in $2^n$ have every digit from $1$ to $9$ Is there a standard definition of "brute force"? Maybe we can claim that there's something clever about doubling decimal digits rather than multiplying them by any other constant. Doubling 1024 obviously produces another number with four distinct digits because 0,1,2,and 4 are all in the lower half of the decimal digits. Aug 1 comment Is it fair to say that Kepler's equation involves squaring the circle? There is much pleasure to be had with such things. If your interest takes you in this direction and you haven't yet looked at these particular points, you may also wish to study 1. the conditions under which it is impossible to square the circle and 2. the interesting proof that it is impossible. Beyond that, from the book Mathematical Cranks I learned that there are some who venture into solving the classic impossibilities and later display serious mental illness. That's not a diagnosis and I'm not a doctor. But if I spent tons of time on this hobby, I hope I'd discuss it with a therapist. May 22 awarded Quorum May 6 awarded Caucus Apr 25 comment Could G. H. Hardy make a product of two primes so big he couldn't find out which? Not G.H. Hardy, but "Gauss can factor a two million digit semiprime in his head!" gaussfacts.com/view/Mathematics/825 Apr 19 awarded Popular Question Mar 18 comment How do I approach the following integral? The antiderivative in software such as Mathematica (thus Alpha) is known as the Risch algorithm. Vaguely I recall that it isn't, or at least didn't used to be, practical to implement the Risch algorithm in full generality, and in the gaps Mathematica tells lies. The Wikipedia article for the algorithm says (citing nothing) that is unknown whether the Risch algorithm has all expressions in the "usual" (meaning?) elementary functions in its domain; and that by Richardson's theorem the expressions in those functions with the addition of the absolute value function are not all in its domain. Feb 28 revised Parametric curve for a tennis ball seam fix another of my errors Feb 28 revised Parametric curve for a tennis ball seam longitude Feb 28 comment Parametric curve for a tennis ball seam @bubba Thanks, I went on to explain some of the symmetries. So, yes, yes it does. Feb 28 revised Parametric curve for a tennis ball seam deleted 83 characters in body Feb 28 revised Parametric curve for a tennis ball seam deleted 83 characters in body Feb 28 revised Parametric curve for a tennis ball seam added 2170 characters in body Feb 28 answered Parametric curve for a tennis ball seam Feb 26 comment Sequence Question from past post Yes, I realize that this question is a follow-up and I don't think it's a duplicate.