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seen Aug 2 at 13:14

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.
Feb
26
accepted Is it fair to say that Kepler's equation involves squaring the circle?