haruspex's latest activity

Which is still illegible.

I am reminded of a bogus calculation by Australian politician Greg Hunt...

A vertical stick in the ground would have been good enough for Eratosthenes. Need a plumb line, though. The context is unclear. Are...

According to AI Overview Evaluation:The resulting integral ##\int\sqrt{1+cosh^2(x)}dx## does not have a simple elementary closed-form...

If we conclude ##x=a## (where a is well defined) then we necessarily mean that it is the only value of x that satisfies the conditions...

Right, which is why it is a fallacy to claim it equals zero. It is an axiom that if x=a and x=b then a=b. That is what would be implied...

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...