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Theorem bu 4

Description: Normal form for unary selbri. (Contributed by la korvo, 14-Aug-2023.)

Assertion

Ref	Expression
bu	bridi ko'a bu'a

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Proof of Theorem bu

Step	Hyp	Ref	Expression
1		btb 3	1 bridi ko'a bu'a

Colors of variables: sumti selbri bridi

Syntax hints:  tsb 1  btb 3

This theorem is referenced by:  dui  216  duis  217  duri  218  duris  219  du-refl  220  du-trans  221  du-symi  223  zilcmi-nomei  410  cmima-zilcmi  411  ro-quanti  421  ro-quantri  422  fatcii  448  fatciri  449

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