λδ digital library (LDDL)
Constant
![[butterfly]](http://helm.cs.unibo.it/lambdadelta/images/b5.png "\lambda\delta butterfly")
Informal description: ""
{λ[a:dif].λ[r1:cut].λ[r2:cut]}.<{({({((a).2a).(r2)}.pl).({((a).1a).(r1)}.pl)}.df).({(a).({(r2).(r1)}.df)}.pd).(dif)}.is>.{({({(r2).(r1)}.stdis).((a).2a).(r2).(({(r2).(r1)}.df).std)}.ispl1).({({(r2).(r1)}.stmis).((a).1a).(r1).(({(r2).(r1)}.df).stm)}.ispl1).({((a).2a).(r2)}.pl).({((a).1a).(r1)}.pl).({((a).2a).(({(r2).(r1)}.df).std)}.pl).({((a).1a).(({(r2).(r1)}.df).stm)}.pl)}.issmsd 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")