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Các bài báo tiêu biểu
Swing Lattice Game and a direct proof of the Swing Lemma for planar semimodular lattices
Tập 83 - Trang 13-29 - 2017
The Swing Lemma, due to G. Grätzer for slim semimodular lattices and extended by
G. Czédli, G. Grätzer, and H. Lakser for all planar semimodular lattices,
describes the congruence generated by a prime interval in an efficient way. Here
we present a new, direct proof of this lemma, which is shorter than the earlier
ones. Also, motivated by the Swing Lemma and mechanical pinball games with
flippers,...
Some new paranormed sequence spaces defined by Euler and difference operators
Tập 76 Số 1-2 - Trang 87-100 - 2010
On the representation of finite convex geometries with convex sets
Tập 83 Số 1-2 - Trang 301-312 - 2017