太平间
发表于 2025-3-21 16:36:00
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爱哭
发表于 2025-3-21 22:12:16
Planar Semimodular Lattices: Structure and Diagramsstudy of . lattices began only in 2007 (G. Grätzer and E. Knapp – and G. Grätzer and T. Wares ). This was followed by G. Czédli and E.T. Schmidt –, and G. Czédli . This chapter presents an overview of these papers.
扔掉掐死你
发表于 2025-3-22 03:14:15
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不透明性
发表于 2025-3-22 08:34:21
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IOTA
发表于 2025-3-22 12:47:40
https://doi.org/10.1007/978-3-319-06413-0combinatorics; congruence lattice; finite lattice; lattice theory; topology
Abrade
发表于 2025-3-22 13:49:08
Frames: Topology Without PointsIn classical (synthetic) geometry, lines and planes are not sets of points. They are entities in their own right, and the geometry is based on relations between them (and points, the other entities present). It is only in analytic geometry that one starts with a set and imposes on it the geometric structure by defining specific subsets.
peak-flow
发表于 2025-3-22 20:34:14
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道学气
发表于 2025-3-22 21:24:18
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Lumbar-Spine
发表于 2025-3-23 02:14:20
Combinatorics in finite latticesCombinatorial or counting problems in lattices were asked as soon as lattices were discovered. In one of the founding papers of lattice theory, , Richard Dedekind asked for the number of elements in the free distributive lattice with . generators.
裙带关系
发表于 2025-3-23 07:41:29
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