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Theorem ce-left 412
Description: Assertion for left-hand component of a {ce} union. (Contributed by la korvo, 5-Aug-2023.)
Assertion
Ref Expression
ce-leftko'a cmima ko'a ce ko'e

Proof of Theorem ce-left
StepHypRef Expression
1 du-refl 256 . 2ko'a du ko'a
21ceri-lin 410 1ko'a cmima ko'a ce ko'e
Colors of variables: sumti selbri bridi
This theorem was proved from axioms:  ax-mp 10  ax-k 11  ax-s 15  ax-ge-le 48  ax-ge-re 49  ax-ge-in 50  ax-gen2 227  ax-qi2 239
This theorem depends on definitions:  df-go 83  df-ga 161  df-o 198  df-du 251  df-ce 407
This theorem is referenced by: (None)
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