[EM] Explaining PR-STV

[Kristofer Munsterhjelm]

Markus Schulze wrote:
> Hallo,
> 
> I would explain proportional representaion
> by the single transferable vote as follows:
> 
> 1) Each voter gets a complete list of all
> candidates and ranks these candidates in
> order of preference.
> 
> 2) Suppose M is the number of seats and
> V is the number of votes. If there is a
> set of X candidates such that strictly more
> than (Y*V)/(M+1) votes strictly prefer
> each candidate of this set to each candidate
> outside this set, then at least min{X,Y}
> candidates of this set must be elected.

Isn't that true of all methods that obey the Droop proportionality 
criterion (including your own STV variant, which does not transfer any 
ballots)?