ceihi - brismu bridi

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Theorem ceihi 232

Description: {cei'i} is always true. (Contributed by la korvo, 18-Jul-2023.)

**Assertion**
Ref	Expression
ceihi	⊢ cei'i

**Proof of Theorem ceihi**
Step	Hyp	Ref	Expression
1		du-refl 220	. 2 ⊢ ko'a du ko'a
2		df-ceihi 231	. 2 ⊢ go cei'i gi ko'a du ko'a
3	1, 2	bi-rev 80	1 ⊢ cei'i

Colors of variables: sumti selbri bridi

Syntax hints: du sbdu 214 cei'i bceihi 230

This theorem was proved from axioms: ax-mp 10 ax-k 11 ax-s 15 ax-ge-le 43 ax-ge-re 44 ax-ge-in 45 ax-gen2 195 ax-qi2 204

This theorem depends on definitions: df-go 61 df-o 167 df-du 215 df-ceihi 231

This theorem is referenced by: mp-ceihi 233 k-ceihi 234 ceihi-nf 404 fatci-ceihi 450