λδ digital library (LDDL)
Constant
![[butterfly]](http://helm.cs.unibo.it/lambdadelta/images/b5.png "\lambda\delta butterfly")
Informal description: ""
{λ[x0:rat].λ[y0:rat].λ[v0:rat].λ[w0:rat].λ[i:{(x0).({(v0).(y0)}.pl)}.is].λ[j:{(x0).({(w0).(y0)}.pl)}.is]}.<{(w0).(v0)}.is>.{(λ[x:frac].λ[y:frac].λ[v:frac].λ[w:frac].λ[xi:{((x0).class).(x)}.inf].λ[yi:{((y0).class).(y)}.inf].λ[vi:{((v0).class).(v)}.inf].λ[wi:{((w0).class).(w)}.inf].{(wi).(vi).(yi).(xi).(w).(v).(y).(x).(j).(i).(w0).(v0).(y0).(x0)}.t6).({(w0).(v0)}.is).(w0).(v0).(y0).(x0)}.ratapp4 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")