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[upsilon:Set].λ[f:Π[x:sigma].tau].λ[g:Π[x:tau].upsilon].λ[sf:{(f).(tau).(sigma)}.surjective].λ[sg:{(g).(upsilon).(tau)}.surjective].λ[u:upsilon]}.<{(u).({(sg).(sf).(g).(f).(upsilon).(tau).(sigma)}.h).(upsilon).(sigma)}.image>.{(λ[x:tau].λ[v:{((x).g).(u).(upsilon)}.is].{(v).(x).(u).(sg).(sf).(g).(f).(upsilon).(tau).(sigma)}.t5).({(u).({(sg).(sf).(g).(f).(upsilon).(tau).(sigma)}.h).(upsilon).(sigma)}.image).({(u).(sg).(sf).(g).(f).(upsilon).(tau).(sigma)}.t1).(λ[x:tau].{((x).g).(u).(upsilon)}.is).(tau)}.someapp 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")