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差集

chā jí
noun★Intermediate
technical

In mathematics, especially in set theory, a difference set (or set difference) is the set of elements that are in one set but not in another.

A和B的差集是A中不属于B的元素。

The difference set of A and B is the elements in A that are not in B.

💡

This concept is fundamental in set theory and is often denoted as A \ B or A - B.

💻Technology
technical

In computer science, the difference set can refer to the result of a set operation that identifies elements present in one collection but not in another.

我们可以通过差集操作找出两个数据集之间的不同。

We can use the difference set operation to find the differences between two datasets.

💡

This is commonly used in data processing and database operations.

Collocations

集合的差集difference set of a set计算差集compute the difference set

Synonyms

Antonyms

Related Phrases

A - Bphrase
The difference set of A and B
A ∁ Bphrase
The complement of B in A

💡Pro Tip

Mathematical Notation

In mathematical notation, the difference set is often written as A \ B or A - B.

⚡Gold Rule

Set Theory Basics

The difference set is a fundamental operation in set theory, alongside union, intersection, and complement.

📖Word Origin

The term '差集' is derived from the mathematical concept of set difference, where '差' means 'difference' and '集' means 'set'.

📝Usage Notes

In Chinese, '差集' is primarily used in mathematical and technical contexts to describe the set of elements that are in one set but not in another.

Word Breakdown

差
difference
root
+
集
set
root
✎ Noted on May 23, 2026ZH → EN

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