通过定义离散化方案之间的偏序关系以及交、并运算，将各种离散化方案组织成离散格。

All discretization schemes are organized into a lattice named discretization lattice after partial order relation, then the meet and join operations between discretization schemes are defined.

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首先讨论了格的子集生成幻和生成对偶幻的运算性质。

This paper discusses the operational properties of generated ideals and generated dual ideals.

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特别是确定了交换的可消幺半群的半格的好同余格上的交与并运算。

Furthermore, the meet and the join for the good congruence lattice are determined for the semilattice of commutative cancellative monoids.

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