haruspex's latest activity

Then let me be more precise in my question. The post is presented as querying the standard approach for the theoretical case of an...

Fwiw, I modelled the original problem for an infinite strip of width 2 and the reference point being distances (y) from the plane of the...

Ok, thanks. So do you agree that the original problem is a convergence issue?

Sorry, I am not following your argument. @Vincf's calculation (in post #1.. maybe you are referring to a later post) is for a single...

A fractal example being the length of a coastline. Depends how long the ruler is.

Really? In post #1, @Vincf obtained: $$E_y(r_1, r_2) =- \frac{\sigma}{2\pi\varepsilon_0}\ln\left(\frac{r_2}{r_1}\right)$$ where ##r_1...

I think there are two issues here, a purely mathematical one and a practical one. In the maths, we can model an infinite sheet as the...

The aim is to find a good approximation for the case where the plate’s breadth is finite but very wide compared with the distance from...

There are various reasonably standard functions for this. See e.g. Iverson Bracket notation, Indicator Function and Heaviside Unit Step...

I don’t see that there is any connection with part a. Just treat part b on its own terms.

Fortunately, it also works for cards😉

Only if you add the condition that the next card is a different colour.

Looks wrong. You first have to decide how many ways you can pick two non overlapping 2x2 squares, then ask for the probability of...

@NTesla, that does it! Look for help elsewhere.

Ok, but you wrote that you wanted the average number of clusters. But I am unsure how you are defining that number. With 6 particles in...