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).(a)}.ts)}.ts).({({(d).(c)}.ts).({(b).(a)}.ts)}.ts)}.is>.{({({(c).(b)}.comts).({(d).(a)}.ts).({(b).(c)}.ts).({(c).(b)}.ts)}.ists2).({({(c).(b)}.ts).(d).(a)}.assts2).({({(d).(c).(b).(a)}.t1).(a).({({(c).(b)}.ts).(d)}.ts).({({(d).(c)}.ts).(b)}.ts)}.ists2).({({(d).(c)}.ts).(b).(a)}.assts1).({({(b).(c)}.ts).({(d).(a)}.ts)}.ts).({({(c).(b)}.ts).({(d).(a)}.ts)}.ts).({({({(c).(b)}.ts).(d)}.ts).(a)}.ts).({({({(d).(c)}.ts).(b)}.ts).(a)}.ts).({({(d).(c)}.ts).({(b).(a)}.ts)}.ts).(nat)}.tr4is 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")