set.mm - revised definitions df-riota, df-lub, df-glb, df-meet, df-join, df-lat, df-oposet, df-atl, and df-clat, and all of their consequences
set.mm - revised definitions df-riota, df-lub, df-glb, df-meet, df-join, df-lat, df-oposet, df-atl, and df-clat, and all of their consequences

metamath/set.mm,metamath/set.mm,metamath/set.mm