Mathematics
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Sigma
  • Member for 6 years, 11 months
  • Last seen more than a month ago
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113
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All Questions Answers
Score Newest
answer
11
At what point of mathematical education can you start inventing new math?
Aug 24, 2019
question
7
Disagreement with professor about Cauchy Sequence
Nov 4, 2019
question
6
How can it be proved that $\int e^{-x^2}dx$ has no elementary closed form? [duplicate]
Feb 26, 2021
question
5
Two players alternate flipping a coin until the result is head. How to derive that the probability for the first player to win is $2/3$? [duplicate]
Feb 8, 2019
question
3
Lines tangent to graph of equation
Apr 20, 2018
answer
3
Prove that $a^2+b^2+c^2\geqslant\frac{1}{3}$ given that $a\gt0, b\gt0, c\gt0$ and $a+b+c=1$, using existing AM GM inequality
Feb 17, 2019
question
3
$x =r\cos \theta$ and $y = r\sin\theta$, determine $\frac{\partial r}{\partial x}$ and $\frac{\partial \theta}{\partial x}$
Sep 22, 2019
question
3
soft question: solution manual for Demidovich Calculus
May 6, 2019
answer
3
If the odds are $10:2$ against the next car you see being red, what percentage of cars in your area are red?
Sep 28, 2020
question
3
Show that $x+y$ and $x-y$ are both irrational
Jan 24, 2021
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14
What if a non-random sample is identical to a random sample?
7
If $X_n \sim \text{Beta}(n, n)$ Show that $[X_n - \text{E}(X_n)]/\sqrt{\text{Var}(X_n)} \stackrel{D}{\longrightarrow} N(0,1)$
7
Obtaining the correct Log-likelihood function
6
Plot3D doesn't generate the ellipitic paraboloid it's supposed to
5
Missing something in this Hypothesis Test question

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