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citations	visibility	version 1	version 1	(static HELM directory)	helena

Informal description: ""

{λ[a:Prop] .​ λ[b:Prop] .​ λ[c:Prop] .​ λ[o:{(b) .​ (a)} .​ or ] .​ λ[i:{(c) .​ (b)} .​ imp ]} .​ <{(c) .​ (a)} .​ or > .​ {(i) .​ (o) .​ (c) .​ (b) .​ ((a) .​ not )} .​ trimp

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