PlanetMath (more info)
 Math for the people, by the people. Sponsor PlanetMath
Encyclopedia | Requests | Forums | Docs | Wiki | Random | RSS  
Login
create new user
name:
pass:
forget your password?
Main Menu
Revision difference : separably algebraically closed field
Version 2 Version 1
A field $K$ is called separably algebraically closed if every separable element of the algebraic closure of $K$ belongs to $K$.\newline A field $K$ is called separably algebraically closed if every separable element of the algebraic closure of $K$ belongs to $K$.\newline
In the case when $K$ has characteristic 0, it is separably algebraically closed if and only if it is algebraically closed.\newline If $K$ has positive characteristic $p$, $K$ is separably algebraically closed if and only if its algebraic closure is a purely inseparable extension of $K$. In the case when $K$ has characteristic 0, it is separably algebraically closed if and only if it is algebraically closed.\newline If $K$ has positive characteristic $p$, $K$ is separably algebraically closed if and only if its algebraic closure is a purely inseparable extension of $K$.