The problem of ksdensity plot in Matlab
I want to verify that random numbers generated by exprnd match the exponential distribution. I used Matlab's ksdensity function – here's the cod...
Apr 17, 2026 1 VIEWS
Topic: General
5104 Articles 
$n$-linear form: An Interpretation
What is a good example of an $n$-linear form that is more familiar to a student learning at an elementary level? EDIT: I'm just trying to show that e...
Apr 17, 2026 1 VIEWS
Find the solution of $y'=10^{x-y}$p
It is asked to find the solution of the ODE $$y'=10^{x-y}$$ The given answer is $10^x+10^{-y}=C$, which I think is wrong. I thought ee should separat...
Apr 17, 2026 1 VIEWS
How to know if a point is inside a circle?
Having a circle with the centre $(x_c, y_c)$ with the radius $r$ how to know whether a point $(x_p, y_p)$ is inside the circle?
Apr 17, 2026 2 VIEWS
Factor a quadratic equation to get two binomials
I'm wrestling with this quadratic and trying to figure out how to factor it: $$3x^2 - 5x + 2 = 0$$ I know that the product of the last terms of the b...
Apr 17, 2026 1 VIEWS
MLE of double exponential
I am given the double exponential distribution under the form $$f(x_i\mid\theta) = \frac{1}{2}e^{-\frac{1}{2}|x_i - \theta|}$$ and I need to find the MLE ...
Apr 17, 2026 2 VIEWS
What does "approach zero" really mean?
We repeat the phrase "approach zero" regularly, but what exactly does it mean to say "$\delta t$ approaches zero"? P.S. If this a stupid question, then pl...
Apr 17, 2026 2 VIEWS
How is the eccentricity of a circle equal to zero?
According to many websites, including Wikipedia, the eccentricity of a conic section is defined as the ratio of (the distance from a fixed point called th...
Apr 17, 2026 1 VIEWS
Why does this age calculation trick work?
The trick works like this: Take the current date in the format yyyymmdd and subtract it with your date of birth taken in the same format. Drop the last fo...
Apr 17, 2026 1 VIEWS
Are there more rational numbers than integers?
I've been told that there are precisely the same number of rationals as there are of integers. The set of rationals is countably infinite, therefore ...
Apr 17, 2026 1 VIEWS
How many n bit sequences of 0's and 1's are there without two consecutive 1's?
Consider all $n$ bit binary sequences such that there are no two consecutive $1$'s. Is it possible to get a closed form expression for the number of ...
Apr 17, 2026 1 VIEWS
Can there be a function that's even and odd at the same time?
I woke up this morning and had this question in mind. Just curious if such function can exist.
Apr 17, 2026 1 VIEWS