λδ digital library (LDDL)
Constant
![[butterfly]](http://helm.cs.unibo.it/lambdadelta/images/b5.png "\lambda\delta butterfly")
Informal description: ""
{λ[x:nat].λ[y:nat]}.<{((λ[v:nat].{({(v).(x)}.pl).(y)}.is).some).((λ[u:nat].{({(u).(y)}.pl).(x)}.is).some).({(y).(x)}.is)}.orec3>.{({(y).(x)}.a).({(y).(x)}.b).({(y).(x)}.iii).({(y).(x)}.ii).({(y).(x)}.i)}.orec3i Validation parameters: sort hierarchy = "Z2", kernel options = ""
Last update: Sat, 12 Dec 2020 10:46:54 +0100
![[Spacer]](http://helm.cs.unibo.it/lambdadelta/images/rainbow.png "\lambda\delta rainbow rule")
![[Generated from XML via XSL]](http://helm.cs.unibo.it/lambdadelta/images/xml_xsl2.png "Generated from XML via XSL")
![[PNG used here]](http://helm.cs.unibo.it/lambdadelta/images/PNGnow2.png "PNG used here")
![[Viewable with any browser]](http://www.anybrowser.org/campaign/bvgraphics/abtfile.png "Viewable with any browser")