Mario Stefanutti

307 reputation

bio	website	4coloring.wordpress.com
	location	Rome, Italy
	age	44
visits	member for	2 years, 1 month
	seen	7 hours ago
stats	profile views	54

	307 reputation	bio	website	4coloring.wordpress.com	visits	member for	2 years, 1 month
26 badges		location	Rome, Italy		seen	7 hours ago

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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!
Jun 16	comment	Four color theorem, 3-regular planar graph, Hamiltonian path and spiral chains @draks: Is the only graph with these characteristics a Dodecahedron?
Jun 16	comment	Four color theorem, 3-regular planar graph, Hamiltonian path and spiral chains Hi, draks. Thanks for the answer, but can you help me to understand how does it relate to my question? Does it mean (imply) that all 3-regular graphs with 20 vertices have Hamiltonian paths?
Jun 15	comment	Four color theorem, 3-regular planar graph, Hamiltonian path and spiral chains Some graphs I was talking about are in this video: youtube.com/watch?v=MyEn2B-hAag&feature=g-upl
Jun 15	comment	Four color theorem, 3-regular planar graph, Hamiltonian path and spiral chains Yes, all these graphs have 20 vertices and 30 edges. One question about your answer. You wrote that "The 3-regular graph with these properties is the Dodecahedron". Yes, but that is just one of the possible graphs, right?