λδ digital library (LDDL)
Constant
![\lambda\delta butterfly [butterfly]](http://helm.cs.unibo.it/lambdadelta/images/b5.png)
Informal description: ""
{λ[x:nat].λ[y:nat].λ[z:nat].λ[i:{((y).suc).(x)}.is].λ[j:{((z).suc).(x)}.is]}.<{(z).(y)}.is>.({(j).(i).(x).((z).suc).((y).suc).(nat)}.tris1).(z).(y).ax4 Validation parameters: sort hierarchy = "Z2", kernel options = ""
Last update: Sat, 12 Dec 2020 10:46:54 +0100