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seen Nov 19 at 18:06

Nov
11
answered Good examples for mathemathical problems/statements that are easely solvable/provable in one theory and hard to solve/prove in another
Nov
11
revised How can I use residue theory to verify this integral formula?
edited tags
Nov
11
answered Choosing the better of two estimators
Nov
9
comment Normal Approximation to find probability of stopping at a red light at least 15 times
if you are happy with the answer, you can accept it...
Nov
9
revised Normal Approximation to find probability of stopping at a red light at least 15 times
added 328 characters in body, adrrectionded concept of conyinuity co
Nov
9
comment Normal Approximation to find probability of stopping at a red light at least 15 times
ok, i'll edit my answer.
Nov
9
answered Normal Approximation to find probability of stopping at a red light at least 15 times
Nov
9
comment Prove this function is onto and one-to-one
Hi, welcome here.Are you sure your function is $\mathbb R \to \mathbb R$ ? As putting $x= -\frac 12$ contradicts this??
Nov
4
comment How can I make estimates on large powers and logarithms such as $e^{10}$?
your question is unclear IMO. How do you estimate?? One way would be to find power series expansion( exists for exp as well as log) and calculating to whatever accuracy you desire...
Nov
2
revised Connectedness of the boundary
edited tags
Oct
13
awarded  Organizer
Oct
13
revised Triangle problem
edited tags
Oct
13
revised An example of the maximum of $f(x)$ and the maximum of $g(x)$ does not to equal to the maximum of $(f+g)(x)$
clarified a question in comments
Oct
13
answered An example of the maximum of $f(x)$ and the maximum of $g(x)$ does not to equal to the maximum of $(f+g)(x)$
Oct
13
comment Solution simple ODE
Welcome to math,SE. What do you find difficult in the question?? Have you tries separating the variables??
Oct
13
revised Let $m \in \mathbb Z, m>1$, then $\cos(2 \pi/m) \in \mathbb Q$ if and only if $m \in \{1,2,3,4,6\}$.
corrected some errors,improved formatting
Oct
13
revised Let $m \in \mathbb Z, m>1$, then $\cos(2 \pi/m) \in \mathbb Q$ if and only if $m \in \{1,2,3,4,6\}$.
corrected some errors
Oct
13
comment Probability mass function and conditional probabilities
Thanks.You have keen sense of observation.
Oct
13
answered Let $m \in \mathbb Z, m>1$, then $\cos(2 \pi/m) \in \mathbb Q$ if and only if $m \in \{1,2,3,4,6\}$.
Oct
13
answered number of integral solutions for $x^2+y^2=5^k$