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math.CO2017
Spanning tree with lower bound on the degrees
Zoltán Király
We concentrate on some recent results of Egawa and Ozeki [J. Graph Theory, 2015 and Combinatorica, 2014], and He et al. [J. Graph Theory, 2002]. We give shorter proofs and polynomi…
math.CO2017
On Ryser's conjecture for t-intersecting and degree-bounded hypergraphs
Zoltan Kiraly, Lilla Tothmeresz
A famous conjecture (usually called Ryser's conjecture) that appeared in the Ph.D thesis of his student, J.~R.~Henderson [15], states that for an -uniform -partite hypergraph…