λδ digital library (LDDL)
Constant
![[butterfly]](http://helm.cs.unibo.it/lambdadelta/images/b5.png "\lambda\delta butterfly")
Informal description: ""
{λ[a:real].λ[b:real].λ[c:real].λ[d:real]}.<{({({(c).(b)}.ts).({(d).(a)}.ts)}.pl).({({(d).(c)}.pli).({(b).(a)}.pli)}.imts)}.is>.{({({(d).(c)}.reis).({(b).(a)}.imis).(c).(({(d).(c)}.pli).re).(b).(({(b).(a)}.pli).im)}.ists12).({({(d).(c)}.imis).({(b).(a)}.reis).(d).(({(d).(c)}.pli).im).(a).(({(b).(a)}.pli).re)}.ists12).({(c).(b)}.ts).({(({(d).(c)}.pli).re).(({(b).(a)}.pli).im)}.ts).({(d).(a)}.ts).({(({(d).(c)}.pli).im).(({(b).(a)}.pli).re)}.ts)}.ispl12 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")