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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  252  duis  253  duri  254  duris  255  du-refl  256  du-trans  257  du-symi  259  zilcmi-nomei  461  cmima-zilcmi  462  ro-quanti  472  ro-quantri  473  fatcii  502  fatciri  503

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