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[i:{(f).(tau).(sigma)}.injective].λ[ta:tau].λ[ja:{(ta).(f).(tau).(sigma)}.image].λ[tb:tau].λ[jb:{(tb).(f).(tau).(sigma)}.image].λ[j:{(tb).(ta).(tau)}.is]}.<{({(jb).(tb).(i).(f).(tau).(sigma)}.soft).({(ja).(ta).(i).(f).(tau).(sigma)}.soft).(sigma)}.is>.{({(jb).(tb).(i).(f).(tau).(sigma)}.ists1).({(ja).(ta).(i).(f).(tau).(sigma)}.ists1).({(jb).(tb).(i).(f).(tau).(sigma)}.soft).({(ja).(ta).(i).(f).(tau).(sigma)}.soft).(j).(tb).(ta).(i).(f).(tau).(sigma)}.th1 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")