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6h
accepted What values of $a$ and $b$ does this system have infinitely many solutions?
6h
comment What values of $a$ and $b$ does this system have infinitely many solutions?
Yep, you're right. I have a $b^{2}$ where it should be $b$ in $a_{34}$. Thanks. Must have done one too many problems today.
6h
comment What values of $a$ and $b$ does this system have infinitely many solutions?
That is also one way to check, but that could also imply there are no solutions. I don't believe it guarantees that there are infinite solutions.
6h
asked What values of $a$ and $b$ does this system have infinitely many solutions?
Jan
25
accepted Why is the CT system $y(t)=x(2t)$ invertible but its DT counterpart non-invertible?
Jan
25
comment Why is the CT system $y(t)=x(2t)$ invertible but its DT counterpart non-invertible?
Makes sense, thanks.
Jan
25
comment Why is the CT system $y(t)=x(2t)$ invertible but its DT counterpart non-invertible?
That's a good way of thinking about it - there's no way to recover the values of $x$ at odd $n$. Still, I'm mulling over the difference between the CT and DT counter-examples.
Jan
25
asked Why is the CT system $y(t)=x(2t)$ invertible but its DT counterpart non-invertible?
Dec
15
awarded  Notable Question
Sep
29
awarded  Yearling
Jul
2
awarded  Curious
Apr
14
revised What is the conditional mass function of $X$ given that $Y = i$?
added 171 characters in body
Apr
14
comment What is the conditional mass function of $X$ given that $Y = i$?
That's what I found...stat.ucla.edu/~rosario/classes/081/100a-2a/100aHW7Soln.pdf (page 16). Also, I will post the full solution to the conditional probability for part b.
Apr
14
asked What is the conditional mass function of $X$ given that $Y = i$?
Mar
30
comment When determining the bounds of integration to calculate the marginal density of X, why are they |x| to infinity?
Yes, this is true, but for some reason it slipped my mind. It's been a while since I worked these sorts of problems, and yes, plotting the domain is quite basic.
Mar
30
comment When determining the bounds of integration to calculate the marginal density of X, why are they |x| to infinity?
Well, that certainly explains it. I suppose I will never forget to plot the domain again...
Mar
30
asked When determining the bounds of integration to calculate the marginal density of X, why are they |x| to infinity?
Feb
20
awarded  Notable Question
Jan
20
accepted Number of outcomes in which each pair of defective items is seperated by at least two functional items
Jan
19
comment Number of outcomes in which each pair of defective items is seperated by at least two functional items
Ah, I understand that. I can't say I thought of it in that way. It's a very simple concept, but it slipped by me. I failed to realize that $(m-1)$ was enumerating the number of terms in the parentheses...thanks.