λδ digital library (LDDL)
Constant
![[butterfly]](http://helm.cs.unibo.it/lambdadelta/images/b5.png "\lambda\delta butterfly")
Informal description: ""
{λ[x0:rat].λ[y0:rat].λ[x1:frac].λ[y1:frac].λ[x1ix0:{((x0).class).(x1)}.inf].λ[y1iy0:{((y0).class).(y1)}.inf]}.<{(({(y0).(x0)}.pl).class).({(y1).(x1)}.pf)}.inf>.{({(y1iy0).(x1ix0).(y1).(x1).(y0).(x0)}.t19).(({(y1).(x1)}.pf).inclass).({(y0).(x0)}.pl).(({(y1).(x1)}.pf).ratof).(λ[t:rat].{((t).class).({(y1).(x1)}.pf)}.inf).(rat)}.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")