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 Yearling
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May
20
revised bound on expectation of a two-variable function under an independent distribution
added 12 characters in body
May
18
awarded  Yearling
May
14
comment How to find value of an unknown in matrix to make system of linear equations consistent
Answering your direct question, yes echelon form row reduction would work as well.
May
14
comment How to find value of an unknown in matrix to make system of linear equations consistent
If you subtract the third row from the second row, you see that the resulting row of the matrix is identical to the first row of the matrix. Consistency would require that the resulting rhs vector element is the same as the first, i.e. $\lambda-5 = -3$, hence $\lambda = 2$.
May
14
revised How to do integration by parts with brownian motion?
added 15 characters in body
May
13
awarded  Enlightened
May
13
awarded  Nice Answer
May
11
comment Expected Number of Coin Tosses to Get Five Consecutive Heads
@pushpen.paul I used Mathematica
May
11
awarded  Popular Question
May
4
comment Probability that a stick randomly broken in five places can form a tetrahedron
@BenjaminDickman As I have already stated in the above comment on Apr. 25, the direct use of quadrature integration of $f(w)$ is bound to fail, because the integrand is discontinuous. I have implemented and attempted to run a hybrid-numeric approach, where $w_1$ is integrated out symbolically for fixed numeric remaining $w_i$. My attempted run of this crashed consuming over 40GB of ram. I have not attempted to rerun this until now. Therefore I did not have any good news updates to post.
Apr
22
comment What is the probability that out of a deck of 16 cards that you will be dealt 2 cards with the same number?
Please "briefly explain your attempted reasoning".
Apr
20
answered Trying to understand the behaviour of i.i.d.
Apr
20
revised Is the product of exponents of normal iid variables a martingale?
edited tags; edited title
Apr
20
comment Is the product of exponents of normal iid variables a martingale?
For some value of $\mu$. What have you tried?
Apr
20
revised The maximum and minimum of five independent uniform random variables
added 774 characters in body
Apr
20
answered The maximum and minimum of five independent uniform random variables
Apr
17
awarded  Necromancer
Apr
15
comment Dice roll probability, at least 9 total?
Checking your answer is easy with Mathematica: Probability[x + y >= 9, Distributed[{x, y}, DiscreteUniformDistribution[{{1, 6}, {1, 6}}]]] gives $\frac{5}{18}$.
Apr
15
answered How do I compute $P(X=Y)$? for independent random variables with with geometric distribution.
Apr
15
revised Galois theory about automorphisms of the field of rational functions
edited title