ceihi - brismu bridi

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Theorem ceihi 208

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 202	. 2 ⊢ ko'a du ko'a
2		df-ceihi 207	. 2 ⊢ go cei'i gi ko'a du ko'a
3	1, 2	bi-rev 70	1 ⊢ cei'i

Colors of variables: sumti selbri bridi

Syntax hints: du sbdu 196 cei'i bceihi 206

This theorem was proved from axioms: ax-mp 10 ax-k 11 ax-s 14 ax-ge-le 34 ax-ge-re 35 ax-ge-in 36 ax-gen2 180 ax-qi2 188

This theorem depends on definitions: df-go 52 df-o 153 df-du 197 df-ceihi 207

This theorem is referenced by: ceihi-nf 365 fatci-ceihi 408