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Apr
21
awarded  Yearling
Dec
14
accepted Rank of Linear Operators Applied to Polynomial
Dec
13
comment Rank of Linear Operators Applied to Polynomial
@MattN. when I say conjugate, I mean there exists an invertible linear map $R$ such that $T=RSR^{-1}$
Dec
13
comment Rank of Linear Operators Applied to Polynomial
@froggie $f(T)$ and $f(S)$ would be conjugate as well...but how would this help with rank?
Dec
13
comment Rank of Linear Operators Applied to Polynomial
@MattN. what the heck is $A$?
Dec
13
asked Rank of Linear Operators Applied to Polynomial
Dec
12
asked Notation Two Headed Arrow
Dec
7
accepted How does one prove that a polynomial has no rational roots in general?
Dec
7
comment How does one prove that a polynomial has no rational roots in general?
The reason to use more advanced stuff is because that is the course I am in, modern algebra. The point is that I already understand this theorem under the typical "high school" guise. However, it another context, it can be harder to grasp.
Dec
7
comment How does one prove that a polynomial has no rational roots in general?
Is there a way to get the results of this theorem in order to use it without actually proving it in detail from the link? In other words, can you derive these results about possible rational roots by just considering $\mathbb{Z}[x]$ as a UFD?
Dec
7
comment How does one prove that a polynomial has no rational roots in general?
Got it, thanks!
Dec
7
comment How does one prove that a polynomial has no rational roots in general?
What I meant is, first and foremost, the only factors that a rational root depends on is those of $a_0$ and $a_n$? In other words, there is no rational roots that might "slip through the cracks" of this possible list? More generally, would there be any exceptions to the application of this theorem?
Dec
7
accepted Can the Euclidean algorithm prove Euclid's Lemma in a UFD?
Dec
7
comment How does one prove that a polynomial has no rational roots in general?
So each rational root ONLY depends on $a_0$ and $a_n$?
Dec
7
comment How does one prove that a polynomial has no rational roots in general?
First of all, I don't know what the rational roots theorem is. Second of all, how would you prove this generally? I have a few more examples that I need to prove and I don't know how to begin.
Dec
7
comment Can the Euclidean algorithm prove Euclid's Lemma in a UFD?
So you don't need a prime factorization argument?
Dec
7
comment Can the Euclidean algorithm prove Euclid's Lemma in a UFD?
Since $A$ is a UFD, we can let $a=p_1p_2...p_n$ for some primes $p_1,p_2,...,p_n \in A$. Then, for all $i$, $p_i$ does not divide b. But I don't know how to proceed.
Dec
7
comment Can the Euclidean algorithm prove Euclid's Lemma in a UFD?
so how would you go about proving it then?
Dec
7
asked How does one prove that a polynomial has no rational roots in general?
Dec
7
asked Can the Euclidean algorithm prove Euclid's Lemma in a UFD?