A pair of mathematicians solved a legendary question about the proportion of vertices in a graph with an odd number of connections. “It’s a bit of a surprise, at least for me, that such a combination ...
On January 8, three mathematicians posted a proof of a nearly 60-year-old problem in combinatorics called Ringel's conjecture. Roughly speaking, it predicts that graphs — Tinkertoy-like constructions ...
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