Don Blazys, on 02 February 2012 - 05:16 AM, said:
Above all, math is supposed to be fun, and I happen to enjoy reading about curious, unusual or otherwise interesting properties of numbers, even if they have nothing to do with actual mathematics.
Recreation, amusement, joy and laughter are definitely elements in the set of things that make life worth living …
I wholeheartedly agree on the serious and important business of
fun with math. I’m only partly joking about fun being important, because if at least some people didn’t find math pleasant – many, I think, like me, viscerally so – I don’t think enough people would have done it to ever establish math, or even representational language, as an individual and societal human behavior. Without that thrill akin to love that comes from intuiting patterns and formally teasing/proving them out, humans would have remained as we appear to have been for hundreds of thousands of years before the beginning of history, living much like any other animal in our ecological niche. Something closely akin to fun with math
birthed human culture and history, and remains, as I see it, what critically distinguishes us humans mentally from our very close primate species relatives.
Washoe and
Koko showed the glimmerings of it in their affection for rhyme and wordplay, but to the best of my knowledge, no non-human animal has ever shown the least spark of interest in number theory.
pascal, on 01 February 2012 - 08:33 AM, said:
... it is of high interest to me that the exact value of 1/137 is very special as well. It is a repetitive palindrome .0072992700729927. Not too many of those around, at least up to 1/500 (which is as far as I bothered to look). Not only this, but its complement, 136/137= .99270072992700... also uses the same 4 numerals: 0, 2, 7, 9. Most such complements don't. So this fractional sequence is self-complementary (so related to fractals?). Also note that 7-0=9-2. And the end pairs 72 and 27 sum to the central pair 99.
...
Ain't numerology er, hmmph, I mean 'number theory', grand?
137 is
cool! Since reading your post, Jess, I’ve been playing happily with it and other “repeating digit palendromes”.
Numerology, though, isn’t the same as
number theory (“numberology”, if such a word were in common use), any more than a
numeral is the same as a number, the map the same as the territory, or the written word “rock” the same as a rock.
Numerology is a special kind of analysis of the digits of numeral representing numbers. As such, it depends strongly on the numeration scheme used to represent numbers. Most numerology, being popular mostly among mystics with naïve, considering only base 10 Arabic numeral schemes.
Consider,
It is an unusual reciprocal of an integer, because not only does it have palindromic repeating digits – that is,

,

...

– but it has more digits of its base (4 out of 10) than any other reciprocal of a small integer (I checked through

). In bases other than 10, however, checking through base 500000, it doesn’t have any palindromes.
Of all the small integers in all bases, I found

to have the most impressive palindrome. Checking through

, it’s the largest base to have a palindrome containing all the digits in its base, for bases up to 100. All base 2 palindromes contain both of its 2 numerals, as do, it appears, about 22% of base 3 palendromes, but after base 5, there don’t seem to be any for small (<10000) integers.
The numerological specialness of
numeral representation of

and

depends as much on the number 10 and 5 as they do on the numbers 137 and 898. Since the choice of base for a given numeral system, or even the choice of regular-exponent-of-a-base numeration systems, is arbitrary and cultural (in our case, almost certainly due to us having 10 fingers), the numerological specialness of numbers like these has as much to do with our culture as with fundamental qualities of nature or numbers.
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