λδ digital library (LDDL)
Constant
![[butterfly]](http://helm.cs.unibo.it/lambdadelta/images/b5.png "\lambda\delta butterfly")
Informal description: ""
{λ[alpha:Set].λ[x:nat].λ[y:nat].λ[i:{(x).(y)}.is].λ[f:Π[t:(y).1to].alpha].λ[u:(y).1to]}.<{((u).{(f).(i).(y).(x).(alpha)}.f2).((u).f).(alpha)}.is>.{({(u).(f).(i).(y).(x).(alpha)}.t7).({({(u).({(f).(i).(y).(x).(alpha)}.t4).(y).(x)}.left1to).({(f).(i).(y).(x).(alpha)}.t5).(x).(y)}.left1to).(u).(f).(alpha).((y).1to)}.isf 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")