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foreword	milestones	version 2	version 2	(background - core - applications)	library	(static LDDL directory)
citations	visibility	version 1	version 1	(static HELM directory)	helena

Informal description: ""

{λ[x: frac ] . λ[y: frac ] . λ[z: frac ] . λ[u: frac ] . λ[e:{(y) . (x)} . eq ] . λ[f:{(u) . (z)} . eq ]} . <{({({({(u) . (z) . (y) . (x)} . 2u ) . ({(z) . (y) . (x)} . 2z )} . ts ) . ({({(y) . (x)} . 2y ) . ((x) . 1x )} . ts )} . ts ) . ({({({(u) . (z) . (y) . (x)} . 2u ) . ({(y) . (x)} . 2y )} . ts ) . ({({(z) . (y) . (x)} . 2z ) . ((x) . 1x )} . ts )} . ts )} . is > . {({({({(z) . (y) . (x)} . 2z ) . ({(u) . (z) . (y) . (x)} . 2u )} . comts ) . ({({(y) . (x)} . 2y ) . ((x) . 1x )} . ts ) . ({({(u) . (z) . (y) . (x)} . 2u ) . ({(z) . (y) . (x)} . 2z )} . ts ) . ({({(z) . (y) . (x)} . 2z ) . ({(u) . (z) . (y) . (x)} . 2u )} . ts )} . ists2 ) . ({({(y) . (x)} . 2y ) . ({(u) . (z) . (y) . (x)} . 2u ) . ({(z) . (y) . (x)} . 2z ) . ((x) . 1x )} . stets ) . ({({({(u) . (z) . (y) . (x)} . 2u ) . ({(y) . (x)} . 2y )} . comts ) . ({({(z) . (y) . (x)} . 2z ) . ((x) . 1x )} . ts ) . ({({(y) . (x)} . 2y ) . ({(u) . (z) . (y) . (x)} . 2u )} . ts ) . ({({(u) . (z) . (y) . (x)} . 2u ) . ({(y) . (x)} . 2y )} . ts )} . ists2 ) . ({({({(u) . (z) . (y) . (x)} . 2u ) . ({(z) . (y) . (x)} . 2z )} . ts ) . ({({(y) . (x)} . 2y ) . ((x) . 1x )} . ts )} . ts ) . ({({({(z) . (y) . (x)} . 2z ) . ({(u) . (z) . (y) . (x)} . 2u )} . ts ) . ({({(y) . (x)} . 2y ) . ((x) . 1x )} . ts )} . ts ) . ({({({(y) . (x)} . 2y ) . ({(u) . (z) . (y) . (x)} . 2u )} . ts ) . ({({(z) . (y) . (x)} . 2z ) . ((x) . 1x )} . ts )} . ts ) . ({({({(u) . (z) . (y) . (x)} . 2u ) . ({(y) . (x)} . 2y )} . ts ) . ({({(z) . (y) . (x)} . 2z ) . ((x) . 1x )} . ts )} . ts ) . ( nat )} . tr3is

Validation parameters: sort hierarchy = "Z2", kernel options = ""