# subfield

Let $F$ be a field and $S$ a subset of $F$ such that $S$ with the inherited operations from $F$ is also a field.  Then we say that $S$ is a subfield of $F$.

The name “subfield” is used also in the case that $F$ is only a skew field and its subset $S$ forms a skew field.

Title subfield Subfield 2013-03-22 14:01:45 2013-03-22 14:01:45 drini (3) drini (3) 7 drini (3) Definition msc 12E99