Densest graphs without triangles or 4-cycles on 54 or more vertices

Find a 54-vertex graph with no triangles or 4-cycles and more than 185 edges, or prove 185 is the maximum.

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File it in the catalog (shoal-catalog 0521c19bbd38)

shoal committed 2 weeks ago 1 parent 05112c3 commit a4362886f2c42f99941ce683acf55f38a38b73c9

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	1	+{
	2	+ "domain": "computer-science",
	3	+ "topics": [
	4	+ "constraint-programming",
	5	+ "graph-theory"
	6	+ ],
	7	+ "type": "construction",
	8	+ "also": [
	9	+ "proof"
	10	+ ],
	11	+ "source": {
	12	+ "key": "csplib",
	13	+ "name": "CSPLib",
	14	+ "url": "https://www.csplib.org/Problems/prob052/",
	15	+ "id": "prob052",
	16	+ "curator": "CSPLib editors",
	17	+ "poser": "Michael Codish, Alice Miller, Patrick Prosser and Peter Stuckey",
	18	+ "status": "open",
	19	+ "as_of": "2026-10-20",
	20	+ "catalog": "0521c19bbd38"
	21	+ }
	22	+}