subgroup

小集団、サブグループ

大きな集団の一部の人や物からなる小さな集団。

やさしい英語で： A smaller group made up of some members of a larger group.

• Each subgroup chose a leader.
• We compared the results for different age subgroups.
• A small subgroup of students needed extra help.

使い方： a subgroup of something (This subgroup of patients responded well.)

類義語： subset

よく使う表現： subgroup of something, patient subgroup, small subgroup

部分群

数学の群の中で、同じ演算によってそれ自体も群となる集合。

やさしい英語で： A set within a mathematical group that also forms a group using the same operation.

• This subgroup contains the identity element.
• The proof uses a normal subgroup of the original group.
• Every subgroup must contain the inverse of each of its elements.

使い方： a subgroup of a group (We identified a subgroup of the finite group.)

よく使う表現： normal subgroup, cyclic subgroup, subgroup of something

小集団に分ける

大きな集団の人や物を、さらに小さな集団に分ける。

やさしい英語で： To divide people or things into smaller groups within a larger group.

• We subgroup the patients by age.
• The researchers subgrouped participants according to their symptoms.
• You can subgroup the data before comparing the results.

使い方： subgroup something by something (We subgrouped the results by region.); subgroup something into something (The team subgrouped participants into three age categories.)

類義語： subdivide, classify

よく使う表現： subgroup by age, subgroup the participants, subgroup the data