Français
1. General information about bodies
1.1 Defining bodies and sub-bodies
Recall that any application (x, y) → x * y associating any pair (x, y) of E × E with an element of E, noted here x * y, is called an "internal composition law" (or more simply "operation") on a non-empty set E.
By way of example, here are some well-known laws of internal composition:
in the set
...
...
The Ultimate Scientific and Technical Reference
This article is included in
Mathematics
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
General information about bodies
Definition and properties of the body of real numbers
