File:Collatz-graph-300.svg
Size of this PNG preview of this SVG file: 188 × 600 pixels. Other resolutions: 75 × 240 pixels | 150 × 480 pixels | 240 × 768 pixels | 321 × 1,024 pixels | 642 × 2,048 pixels | 1,315 × 4,195 pixels.
Original file (SVG file, nominally 1,315 × 4,195 pixels, file size: 99 KB)
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Summary
Directed graph showing the orbits of all the odd numbers less than 300 under the Collatz map.
Created with Graphviz, with the help of this Python program:
dotfile = file('collatz-graph.dot', 'w')
limit = 300
def f(n):
while n % 2 == 0: # divide by 2 until it's odd
n /= 2
n = 3*n + 1
while n % 2 == 0:
n /= 2
return n
explored = set([1])
dotfile.write('digraph {\n')
for n in range(3, limit, 2): # odd numbers
while n not in explored:
dotfile.write(str(n) + ' -> ')
explored.add(n)
n = f(n)
dotfile.write(str(n) + ';\n')
dotfile.write('}\n')
Licensing
|
This work has been released into the public domain by its author, Keenan Pepper. This applies worldwide. In some countries this may not be legally possible; if so: Keenan Pepper grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:11, 10 June 2007 | | 1,315 × 4,195 (99 KB) | Keenan Pepper | Directed graph showing the orbits of the odd numbers under the Collatz map. Created with Graphviz, with the help of this Python program: dotfile = file('collatz-graph.dot |
File usage
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