> For the complete documentation index, see [llms.txt](https://sudoku.kazusa.tech/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sudoku.kazusa.tech/rank-theory/02-range-of-rank.md).

# 秩的三种取值

下面我们将带着大家如何分析秩的计算，以及如何通过秩理论获得一些基础结构的删数结论。