λδ digital library (LDDL)
Constant
![[butterfly]](http://helm.cs.unibo.it/lambdadelta/images/b5.png "\lambda\delta butterfly")
Informal description: ""
{λ[sigma:Set].λ[tau:Set].λ[f:Π[x:sigma].tau].λ[g:Π[x:sigma].tau].λ[i:{(g).(f).(Π[x:sigma].tau)}.is].λ[s:sigma]}.<{((s).g).((s).f).(tau)}.is>.{(i).({((s).f).(tau)}.refis).(g).(f).(λ[y:Π[x:sigma].tau].{((s).y).((s).f).(tau)}.is).(Π[x:sigma].tau)}.isp 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")