- Is thi set of vectors, $\ { (2, 1), (3, 2), (1, 2)\}$, is linearly . . .
When you have vectors like $\displaystyle\left [\begin {array} {c}1\\2\end {array}\right]=1\mathbf {i}+2\mathbf {j}$, they live on the plane where there are essentially two different directions: left right ($\mathbf {i}$) and up down ($\mathbf {j}$) Every other direction can be made out of combinations of left right and up down; e g $1\mathbf {i}+2\mathbf {j}$ Now for a set to be linearly
- How do the definitions of irreducible and prime elements differ?
You are correct in observing that your lecture notes are not quite right here It is indeed the definition of an irreducible element What you read elsewhere is indeed the definition of prime element
- Given metric space $\\langle X,d\\rangle$ and closed subset $A . . .
I've got this question as homework in my Topology course and having it difficult to solve Question Given metric space $\langle X,d\rangle$ and closed subset $A
- real analysis - $f (x)=x$ if $x$ is rational , $f (x)=1-x$ if $x$ is . . .
Let $D= [0,1]$, and $f (x)=x$ if $x$ is rational, $f (x)=1-x$ if $x$ is irrational, at what point of $I$ is $f$ continuous? I think the answer is $1 2$, using
- Show that operations of addition and multiplication on $Z$ are agreed . . .
You'll need to complete a few actions and gain 15 reputation points before being able to upvote Upvoting indicates when questions and answers are useful What's reputation and how do I get it? Instead, you can save this post to reference later
- algebraic geometry - On an elliptic curve, canonical divisors and . . .
I'm reading about elliptic curves Let $K$ denote a field $E$ denote an elliptic curve over $K$ From what I gather: A principal divisor of $E$ is a divisor of the
- What does versus mean in the context of a graph?
The answer (as is often the case) come from Latin "versus" simply means against and is used in the sporting context as well We say that in some contest "Team A versus team B", meaning team A is against team B The graph is the same - one variable is plotted against (or versus) another From the same cognate root we also get the English "adversary"
- probability theory - Regular conditional probabilities: a confusion . . .
I'm reading a proof of Theorem 2 29 below from this note First, we recall a definition and a lemma, i e , Definition 2 28 Let $(\\Omega, \\mathcal{F}, \\mathbb{P})$ be a probability space, $(T, \\ma
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