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[tb:tau].λ[j:{(tb).(ta).(tau)}.is].λ[sa:sigma].λ[sb:sigma].λ[ja:{({(sa).(f).(tau).(sigma)}.tofs).(ta).(tau)}.is].λ[jb:{({(sb).(f).(tau).(sigma)}.tofs).(tb).(tau)}.is]}.<{({(sb).(f).(tau).(sigma)}.tofs).({(sa).(f).(tau).(sigma)}.tofs).(tau)}.is>.{(jb).(j).({(ja).({(sa).(f).(tau).(sigma)}.tofs).(ta).(tau)}.symis).({(sb).(f).(tau).(sigma)}.tofs).(tb).(ta).({(sa).(f).(tau).(sigma)}.tofs).(tau)}.tr3is 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")