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]}.<{({({(f).({({(i).(x).(y).(nat)}.symis).(y).(x)}.lessisi2).(x).(y).(alpha)}.left).({(i).(x).(y)}.lessisi2).(y).(x).(alpha)}.left).(f).(Π[t:(y).1to].alpha)}.is>.{(λ[t:(y).1to].{(t).(f).(i).(y).(x).(alpha)}.t8).({(f).(i).(y).(x).(alpha)}.f2).(f).(alpha).((y).1to)}.fisi 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")