bu - brismu bridi

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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

**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 198 duis 199 duri 200 duris 201 du-refl 202 du-trans 203 du-sym 204 zilcmi-nomei 368 cmima-zilcmi 369 ro-quanti 379 ro-quantri 380 fatcii 406 fatciri 407