λδ digital library (LDDL)
Constant
![[butterfly]](http://helm.cs.unibo.it/lambdadelta/images/b5.png "\lambda\delta butterfly")
Informal description: ""
{λ[x:frac].λ[n1:nat].λ[n2:nat]}.<{({(x).({(n2).(n1)}.fr)}.pf).({({((x).2x).(n2)}.ts).({({(n2).((x).1x)}.ts).({((x).2x).(n1)}.ts)}.pl)}.fr)}.eq>.{({(n2).(n1).(x)}.pf2).({({((x).2x).(n2)}.ts).({({(n2).((x).1x)}.ts).({((x).2x).(n1)}.ts)}.pl)}.fr).({(x).({(n2).(n1)}.fr)}.pf)}.refeq2 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")