λδ digital library (LDDL)
Constant
![[butterfly]](http://helm.cs.unibo.it/lambdadelta/images/b5.png "\lambda\delta butterfly")
Informal description: ""
{λ[a:nat].λ[b:nat].λ[c:nat].λ[d:nat]}.<{({({(b).(c)}.ts).(d)}.ts).({({(d).(c)}.ts).(b)}.ts)}.is>.{({(b).(c).(d)}.assts1).({({(d).(c)}.comts).(b).({(c).(d)}.ts).({(d).(c)}.ts)}.ists1).({({(d).(c)}.ts).(b)}.comts).({({(b).(c)}.ts).(d)}.ts).({(b).({(c).(d)}.ts)}.ts).({(b).({(d).(c)}.ts)}.ts).({({(d).(c)}.ts).(b)}.ts).(nat)}.tr3is 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")