👉 In mathematics, a subgrade (or "subgrain") is a subring of a ring. This means that it contains all but one element of the original ring. For example, in the ring of integers $\mathbb{Z}$, the subrings are $\mathbb{Z}/n\mathbb{Z}$ for $n > 1$. The set of all subgrains is denoted as $\text{Subgrains}(\mathbb{Z})
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What is the definition of Subgrade? 🙋
👉 The term "subgrade" refers to the lower layer of soil or rock below the surface, which is typically less dense and less permeable than the surface. Subgrade materials are used in construction projects as a way to improve stability and reduce erosion. The term is often associated with the concept of "the earth's natural resistance."
