Formatting Fix
This commit is contained in:
@@ -1,4 +1,5 @@
|
||||
# Chapter 16 - Rings
|
||||
|
||||
## Section 16.1 - Rings
|
||||
|
||||
**Definition**. A nonempty set $S$ is a *ring* if, with two binary operations called addition and multipllication, the following are satisfied:
|
||||
@@ -139,4 +140,4 @@ $$
|
||||
|
||||
Thus, $ab \in P$. By symnetry, assume $a \notin P$. Thus, $b \in P$ by the devinition of a prime ideal, so $b + P = 0 + P$, meaning $R/P$ is an integral domain.
|
||||
|
||||
**Theorem**. 16.40: In a commutative ring with identity, every maximal ideal is also a prime ideal.
|
||||
**Theorem**. 16.40: In a commutative ring with identity, every maximal ideal is also a prime ideal.
|
||||
|
||||
@@ -1,4 +1,5 @@
|
||||
# Chapter 17 - Polynomial Rings
|
||||
|
||||
## Section 17.1 - Polynomial Rings
|
||||
|
||||
Throughout this chapter, we will assume that $R$ is a commutative ring with identity.
|
||||
@@ -63,4 +64,4 @@ Then, if $p | a_i$ for $0 \leq i < n$, but $p \nmid a_n$ and $p^2 \nmid a_0$, th
|
||||
|
||||
**Theorem**. If $F$ is a field, then every ideal in $F[x]$ is a principal ideal.
|
||||
|
||||
**Theorem**. Let $F$ be a field, and suppose $p(x) \in F[x]$. Then, the ideal $<p(x)>$ is maximal if and only if $p(x)$ is irreducible.
|
||||
**Theorem**. Let $F$ be a field, and suppose $p(x) \in F[x]$. Then, the ideal $<p(x)>$ is maximal if and only if $p(x)$ is irreducible.
|
||||
|
||||
@@ -98,4 +98,4 @@ As a direct consequence, we see the following.
|
||||
|
||||
1. Given a field $F$, since $F$ is a PID, it is also a UFD. Thus, $F[x]$ is a UFD.
|
||||
2. The ring of polynomials over integers, $\mathbb{Z}[x]$ is a UFD.
|
||||
3. Given $D$ is a UFD, $D[x]$ is a UFD. Thus, $D[x_1, x_2]$ is a UFD, and by induction, $D[x_1, \ldots, x_n]$ is a UFD.
|
||||
3. Given $D$ is a UFD, $D[x]$ is a UFD. Thus, $D[x_1, x_2]$ is a UFD, and by induction, $D[x_1, \ldots, x_n]$ is a UFD.
|
||||
|
||||
Reference in New Issue
Block a user