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flawr
flawr
1:09 PM
I've never seen this type of puzzle game before, but it seems very interesting:
 
 
2 hours later…
El'endia Starman
El'endia Starman
3:05 PM
@flawr That's pretty cool.
 
Nathan Merrill
Nathan Merrill
3:27 PM
@flawr I ignored this when I first saw it...but this is really cool
its really not about music though
its about cycles in base 12
oh wait.
The lines aren't consistent
:/
like, there's a diagonal line that goes Fb Ab C E
the one next to it goes Bb Db F A
the first diagonal line is all major thirds (and Fb and E are the same note)
the second starts with a minor third
then does major thirds
Ooooh...its a double flat. Nevermind. They need to write their double flats better :P 
   1   8   3   A
 A   5   0   7   2
   2   9   4   B
 B   6   1   8   3
   3   A   5   0
 C   7   2   9   4
   4   B   6   1
Anyways, that's basically the pattern
you have +5 going east, +4 going south-east, +3 going north-east, and +1 going south
 
Feeds
Feeds
3:53 PM
 
 
2 hours later…
flawr
flawr
6:00 PM
Any ideas for interesting integral functions with (a) fixed point(s)? Asking for this here.
 
Martin Ender
Martin Ender
6:40 PM
@flawr I suggest using subscripts instead of parentheses for the x(k)
"You can assume that the generated sequence actually contains a fixed point." that's not enough
f(even x) = x
f(odd x) = x + 2
that one has an infinite number of fixed points, but starting from x_1 = 1, you won't find one
oh nevermind
"the generated sequence"
I somehow thought you'd just said "the given function"
your third example doesn't have any fixed points
anyway, another example: f(x) = digit sum of x.
 
flawr
flawr
7:34 PM
@MartinEnder oh thanks!
@MartinEnder I've tried, but it looks really ugly, especially for the k+1 expression
@MartinEnder oh cool idea:)
 
Martin Ender
Martin Ender
@flawr really? using <sub>?
 
flawr
flawr
@MartinEnder ah no, using unicode
but <sub> doesn't work in the code environment, doesn't it?
 
Martin Ender
Martin Ender
you can always get an HTML code environment with <code> (or <pre><code> for code blocks)
I prefer bold over code for maths anyway though
example from an answer of Dennis's: codegolf.stackexchange.com/a/104681/8478
 
flawr
flawr
I'm trying it right now, but but it seems that **something** doesn't make every symbol bold.
 
Martin Ender
Martin Ender
hm, okay. well you can always just use <code> instead of backticks, then <sub> should work.
 
flawr
flawr
7:42 PM
@MartinEnder right, that is what I'm changing it to now
@MartinEnder What do you think about the notation c(x) = x/2 if x is even; 3*x+1 otherwise
 
Martin Ender
Martin Ender
I wonder if there's a neat (i.e. not too contrived) f where every iteration ends in a fixed points, but the fixed points are sparse and have large/unbounded values
 
flawr
flawr
as opposed to e.g. c(x) = if x is even then x/2 otherwise 3*x+1
 
Martin Ender
Martin Ender
@flawr I prefer this one
 
flawr
flawr
Thanks for the feedback so far!
@MartinEnder something like f(x) = x+20*sin(20/abs(x)+1) might work (after rounding)
but it is difficult to analyze
 
Martin Ender
Martin Ender
the Mathematica solution for the challenge is really nice syntactic gibberish... #//.#2@#&
although this only works if the fixed point is reached within 2^16 iterations
The alternative is the 10-byte built-in FixedPoint
 
flawr
flawr
8:31 PM
In haskell it would be until=<<((==)=<<) (explanation here)
 

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