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λδ digital library (LDDL)
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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
Constant [spacer]
Declaration: is (ld:/Environment/grundlagen_2/l/e/is.ld)
Informal description: ""
{Π[sigma:Set] .​ Π[s:sigma] .​ Π[t:sigma]} .​ Prop
Validation parameters: sort hierarchy = "Z2", kernel options = ""
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Last update: Sun, 04 Jan 2015 21:57:28 +0100