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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[l:{({(z) . (y)} . tf ) . ({(z) . (x)} . tf )} . lessf ]} . <{(y) . (x)} . lessf > . {(l) . (λ[u:{(y) . (x)} . lessf ] . {(u) . (z) . (y) . (x)} . satz72c ) . (λ[u:{(y) . (x)} . moref ] . {(u) . (z) . (y) . (x)} . satz72a ) . (λ[u:{(y) . (x)} . eq ] . {(u) . (z) . (y) . (x)} . satz72b ) . ({(z) . (y) . (x)} . t2 ) . ({(z) . (y) . (x)} . t1 ) . ({({(z) . (y)} . tf ) . ({(z) . (x)} . tf )} . lessf ) . ({({(z) . (y)} . tf ) . ({(z) . (x)} . tf )} . moref ) . ({({(z) . (y)} . tf ) . ({(z) . (x)} . tf )} . eq ) . ({(y) . (x)} . lessf ) . ({(y) . (x)} . moref ) . ({(y) . (x)} . eq )} . th12

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