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Aug
16
asked How many distinct lists of 14 integers $L=\{v_1,\ldots ,v_{14}\}$ exist satisfying $v_i \geq v_{i+1}\geq 0$ and $\sum _{i=1}^{14}(v_i) \leq 54$
Jul
15
revised Show existence of periodic solution to $x'=f(t,x)$ where $f(t+T,x)=f(t,x)\ \forall t$, $\exists p,q|\forall t,f(t,p)>0>f(t,q)$ and $f\in C^{\infty}$.
edited title
Jul
15
comment Show existence of periodic solution to $x'=f(t,x)$ where $f(t+T,x)=f(t,x)\ \forall t$, $\exists p,q|\forall t,f(t,p)>0>f(t,q)$ and $f\in C^{\infty}$.
I see where I was unclear on this, thanks! I meant there exists $p$ and $q$ such that for all $t$ we have $f(t,p)>0>f(t,q)$.
Jul
15
asked Show existence of periodic solution to $x'=f(t,x)$ where $f(t+T,x)=f(t,x)\ \forall t$, $\exists p,q|\forall t,f(t,p)>0>f(t,q)$ and $f\in C^{\infty}$.
Jul
13
comment Matrix Multiplication Integer Solution
$x = -A^{-1}b$, then $Ax+b $ is a vector of zeros given that $A$ is invertible and $A$ and $b$ are of appropriate size.
Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
Jun
29
comment $X_i\sim \operatorname{Ber}(\theta_i)$ and $Y = \sum X_i$, sum of independent Bernoulli trials with different $\theta_i$. Find $\operatorname{Var}(Y)$
Great, thanks :)
Jun
29
accepted $X_i\sim \operatorname{Ber}(\theta_i)$ and $Y = \sum X_i$, sum of independent Bernoulli trials with different $\theta_i$. Find $\operatorname{Var}(Y)$
Jun
29
asked $X_i\sim \operatorname{Ber}(\theta_i)$ and $Y = \sum X_i$, sum of independent Bernoulli trials with different $\theta_i$. Find $\operatorname{Var}(Y)$
Jun
26
accepted find marginal density of $X$ where $X,Y$ have joint density $f(x,y)=c\cdot \exp (-(2x+3y))$ over the region $x>0$ and $x<y$.
Jun
26
comment find marginal density of $X$ where $X,Y$ have joint density $f(x,y)=c\cdot \exp (-(2x+3y))$ over the region $x>0$ and $x<y$.
Ah yes, thanks a lot! can't believe I missed that!
Jun
26
asked find marginal density of $X$ where $X,Y$ have joint density $f(x,y)=c\cdot \exp (-(2x+3y))$ over the region $x>0$ and $x<y$.
Jun
22
revised Prove $ \exists y \in S, \forall x \in S, p(x,y) \implies \exists y \in S, p(y,y) $
added lots of $'s
Jun
22
suggested suggested edit on Prove $ \exists y \in S, \forall x \in S, p(x,y) \implies \exists y \in S, p(y,y) $
Jun
18
asked Which of the following groups are isomorphic to each other?
Jun
17
awarded  Custodian
Jun
17
comment What is the remainder after dividing $(177 + 10^{15})^{166}$ by $1003 = 17 \cdot 59$
you are right, my apologies!
Jun
17
reviewed Approve suggested edit on What is the remainder after dividing $(177 + 10^{15})^{166}$ by $1003 = 17 \cdot 59$
Jun
17
comment What is the remainder after dividing $(177 + 10^{15})^{166}$ by $1003 = 17 \cdot 59$
But then I would still need to raise it the $166$th power to obtain a final answer.