λδ digital library (LDDL)
Constant
![\lambda\delta butterfly [butterfly]](http://helm.cs.unibo.it/lambdadelta/images/b5.png)
Informal description: ""
{λ[x:frac].λ[y:frac].λ[z:frac].λ[u:frac].λ[l:{(y).(x)}.lesseq].λ[k:{(u).(z)}.lesseq]}.<{({(u).(y)}.pf).({(z).(x)}.pf)}.lesseq>.{({({(k).(u).(z)}.satz49).({(l).(y).(x)}.satz49).(z).(u).(x).(y)}.satz66).({(z).(x)}.pf).({(u).(y)}.pf)}.satz48 Validation parameters: sort hierarchy = "Z2", kernel options = ""
Last update: Sat, 12 Dec 2020 10:46:54 +0100