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Jun
25
comment Is the Odd-4 graph a unit-distance graph without vertex overlap?
2. Distance from x to x+1 OR x to x+4 is 1
Jun
25
comment Is the Odd-4 graph a unit-distance graph without vertex overlap?
1. Each color on a unit circle.
Jun
25
comment Is the Odd-4 graph a unit-distance graph without vertex overlap?
For the Robertson (4,5)-cage, you'll first need a 12 cycle. Start with points x=1-12 on a unit circle. Change their distance to the origin to {a,b,c,d} based on whether mod(x,4) equals {0,1,2,3}. Color the points in 3 colors based on mod(x,3). Pick {a,b,c,d} so that
Jun
10
awarded  Yearling
May
20
awarded  Self-Learner
May
20
accepted Biggest Little Polyhedron
May
20
revised Biggest Little Polyhedron
added 247 characters in body
May
11
comment Social Golfer Problem - Quintets
Yes, that's one of the less helpful papers I looked at.
Mar
24
awarded  Nice Question
Mar
21
awarded  Revival
Mar
20
comment Biggest Little Polyhedron
The Mathematica notebook is at the Community link.
Mar
20
answered Biggest Little Polyhedron
Mar
7
awarded  Nice Question
Mar
5
revised Integer hexagonal grid variations for Harborth
added 210 characters in body
Feb
12
accepted Prove a length of 6 in a triangle diagram.
Feb
12
awarded  Inquisitive
Feb
11
comment Prove a length of 6 in a triangle diagram.
That's a lot more elegant than what I have. I'll see if someone posts something even better.
Feb
11
revised Prove a length of 6 in a triangle diagram.
Added propeller theorem
Feb
11
asked Prove a length of 6 in a triangle diagram.
Jan
13
awarded  Revival