Nice link! The problem has been solved, by the way: <a href="http:&#x2F;&#x2F;physics.stackexchange.com&#x2F;questions&#x2F;2072&#x2F;on-this-infinite-grid-of-resistors-whats-the-equivalent-resistance" rel="nofollow">http:&#x2F;&#x2F;physics.stackexchange.com&#x2F;questions&#x2F;2072&#x2F;on-this-infi...</a>