項

1. Origins, structure, and basic meaning

• Structure: Written 項 and read こう, it denotes a numbered clause in a document and a term separated within a mathematical expression.
• Basic usage: It appears in rereading a contract's third clause and simplifying terms on both sides of an equation.

2. Common pitfalls and similar expressions

• Document unit versus mathematical term
  • The field determines whether it is a legal subdivision or an algebraic component.