ceihi - brismu bridi

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Theorem ceihi 268

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 256	. 2 ⊢ ko'a du ko'a
2		df-ceihi 267	. 2 ⊢ go cei'i gi ko'a du ko'a
3	1, 2	bi-rev 102	1 ⊢ cei'i

Colors of variables: sumti selbri bridi

Syntax hints: du sbdu 250 cei'i bceihi 266

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-o 198 df-du 251 df-ceihi 267

This theorem is referenced by: mp-ceihi 269 ceihi-term 270 ceihi-nf 443 fatci-ceihi 504