The subject is German, meaning "it doesn't thaw", which is rather true: as I write this we have chilly -10 °C (14 °F) and 25 cm (10 inches) snow on the ground. And it keeps snowing. I cannot remember a winter like this.
But this is not the reason of my posting! Instead I have hidden a pun in there: "there is no tau", yes, the Greek letter (τ). Which proposition is definitely false, because as of today I succeeded to encode de Bruijn's higher degree binders in Ωmega. I've fought a lot (on and off) against this fortress...
The code is here, see and comment.
PS: Does anybody know a better quality URL for this paper?