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]}.<{({(1).({(y).(x)}.ts)}.fr).({({(1).(y)}.fr).({(1).(x)}.fr)}.tf)}.eq>.{({((1).satz28a).(1).({(1).(1)}.ts).({(y).(x)}.ts)}.eqd).({(1).(y).(1).(x)}.tfeq12a).({(1).({(y).(x)}.ts)}.fr).({({(1).(1)}.ts).({(y).(x)}.ts)}.fr).({({(1).(y)}.fr).({(1).(x)}.fr)}.tf)}.treq 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")