λδ digital library (LDDL)
Constant
![[butterfly]](http://helm.cs.unibo.it/lambdadelta/images/b5.png "\lambda\delta butterfly")
Informal description: ""
{λ[a:Prop].λ[ksi:Set].λ[x:Π[t:a].ksi].λ[y:Π[t:(a).not].ksi].λ[i:∀[t:a].∀[u:a].{((u).x).((t).x).(ksi).(a)}.is].λ[j:∀[t:(a).not].∀[u:(a).not].{((u).y).((t).y).(ksi).(a)}.is].λ[z:ksi]}.<Prop>.{({(λ[t:(a).not].{((t).y).(z).(ksi).(a)}.is).((a).not)}.imp).({(λ[t:a].{((t).x).(z).(ksi).(a)}.is).(a)}.imp)}.and 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")