7,677 reputation
720
bio website linkedin.com/in/gt6989b
location New York, NY
age 35
visits member for 2 years, 11 months
seen Aug 14 at 16:37

Jul
21
answered what is difference between numerical integration and interpolation?
May
14
comment Find the distribution of $X_1^2 + X_2^2$?
@user111548 Yes.
May
14
comment Find the distribution of $X_1^2 + X_2^2$?
@user111548 no. I meant that the mgf of $X$ and mgf of $X/\sigma$ are not the same thing.
May
14
answered Find the distribution of $X_1^2 + X_2^2$?
May
5
comment Proving breath first traversal on graphs
@DrJonesYu Think about what $\textrm{Next}$ is at iteration $k$ -- this is a set of all vertices $x \in V$, such that for some $u \in V$, which is $k-1$ steps from $r$, there is an edge $(u,x)$. But that means $x$ is in the connected component of $r$.
May
5
comment Conditional CDF
@Someone i think so, made the edit
May
5
revised Conditional CDF
added 202 characters in body
May
5
comment How prove this $ n = \frac {a^3 + 2b^3} {c^3 + 2d^3}. $ infinitely many special numbers
For (2), from your equation follows that $a^3$ is even, so $a$ is even, so $a = 2A$ and the equation becomes $$4A^3 + b^3 = 19 \cdot 53 (c^3 + 2d^3),$$ and $b$ and $c$ must have the same parity.
May
5
answered How to prove that the following function is convex?
May
5
revised Calculate Interest
added 11 characters in body; edited tags
May
5
answered Conditional CDF
May
5
answered Confused about isolating an argument from a fraction and computing a value for it
May
5
answered Proving breath first traversal on graphs
May
5
comment Evaluate $\frac{2}{4}\frac{2+\sqrt{2}}{4}\frac{2+\sqrt{2+\sqrt{2}}}{4}\cdots$
Moreover, it's easy to see it is an increasing sequence, you just need to show it is bounded above.
May
5
comment Evaluate $\frac{2}{4}\frac{2+\sqrt{2}}{4}\frac{2+\sqrt{2+\sqrt{2}}}{4}\cdots$
The only thing i can think about - prove that the sequence of terms is a Cauchy sequence. This only requires differences between successive terms.
May
5
comment Evaluate $\frac{2}{4}\frac{2+\sqrt{2}}{4}\frac{2+\sqrt{2+\sqrt{2}}}{4}\cdots$
Numerically, converges to about $0.405284735 \approx \ln(1.5)$
May
5
reviewed Approve suggested edit on How do I calculate the dimensions of this Frustum?
May
1
comment Geometric and algebraic definitions of the dot product , proof of equivalence?
nice and elegant
May
1
comment Geometric and algebraic definitions of the dot product , proof of equivalence?
They do, you just have to express $\cos \theta$ in terms of $a_x, a_y, b_x, b_y$ and do the arithmetic.
May
1
comment How to find the full Taylor expansion of the following:
@user88595 fixed...