haruspex's latest activity

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...

To explain it, we have to come up with a model for how more work is being conserved than we might guess. Consider a rod hinged to a...

Ok, so what velocity does that imply, assuming mechanical work is conserved?

##\frac {v}{2}## is not a length. Do you mean it falls with velocity ##v##? When the top has fallen by ##y##, say, how much GPE has...

In the r=0 limit, there are only two velocities and one of them is zero.

I believe this problem belongs to class that includes the chain fountain effect. In practice, it seems that when the link at the bottom...

Based purely on the text description, I think you are supposed to treat O and A as the same point. Or was the diagram provided? The...

This solution was already posted in posts #2 and #3.

Suppose we look at the situation after both have tossed n coins and say that they have equal probabilities for every number of heads...