360 reputation
29
bio website 4coloring.wordpress.com
location Rome, Italy
age 45
visits member for 3 years, 4 months
seen 12 mins ago

2h
asked Kempe chain color swaps in a partially colored map
Jul
17
awarded  Popular Question
Jul
2
awarded  Curious
Jun
10
awarded  Nice Answer
Apr
16
awarded  Yearling
Mar
25
answered What are the best websites for learning math?
Mar
8
awarded  Necromancer
Jan
31
comment Help with distribution and disposition of faces in a map (four color theorem)
The "far far away land" it is full also of F4 faces (squares) :-) Nice category of graphs, thanks!
Jan
29
revised Question about 3-regular graphs with a restriction (also fullerene and four color theorem)
added 162 characters in body
Jan
28
revised Question about 3-regular graphs with a restriction (also fullerene and four color theorem)
added 262 characters in body
Jan
26
revised Question about 3-regular graphs with a restriction (also fullerene and four color theorem)
Corrected a type error
Jan
25
comment Question about 3-regular graphs with a restriction (also fullerene and four color theorem)
With 17 and 19 faces for sure fullerene exist: hog.grinvin.org/Fullerenes
Jan
25
comment Question about 3-regular graphs with a restriction (also fullerene and four color theorem)
I did a quick check but for now the sequence 1,0,1,1,3 has 252 match. I suppose still too few elements!
Jan
25
asked Question about 3-regular graphs with a restriction (also fullerene and four color theorem)
Nov
17
answered Restrictions on the faces of a $3$-regular planar graph
Nov
17
revised Help with distribution and disposition of faces in a map (four color theorem)
added 5 characters in body
Nov
17
comment Restrictions on the faces of a $3$-regular planar graph
Hi I was analyzing something similar and I think these may interest you. Search ("Simplified maps of 13 faces do not exist!") whithin this page: 4coloring.wordpress.com/open-points-and-notes and read this other question: math.stackexchange.com/questions/158620/…
Jun
22
accepted Four color theorem, 3-regular planar graph, Hamiltonian path and spiral chains
Jun
22
comment Four color theorem, 3-regular planar graph, Hamiltonian path and spiral chains
@Daniel. I verified them with Mathematica and all those graphs are isomorphic!
Jun
19
comment Four color theorem, 3-regular planar graph, Hamiltonian path and spiral chains
@Daniel. I'm verifying if all graphs (I have 10980 cases) are all isomorphic and, so far (I tried some random graphs), they all are. Let me check some other cases and I will accept your answer! But now that you made me notice that, it seems intuitive and I am pretty convinced they are. Thanks!