fatciri - brismu bridi

	brismu bridi		< Previous Next > Nearby theorems
Mirrors > Home > Home > Th. List > fatciri

Theorem fatciri 449

Description: Reverse inference form of df-fatci 447 (Contributed by la korvo, 10-Mar-2024.)

**Hypothesis**
Ref	Expression
fatciri.0	⊢ broda

**Assertion**
Ref	Expression
fatciri	⊢ 1 du'u broda kei fatci

**Proof of Theorem fatciri**
Step	Hyp	Ref	Expression
1		fatciri.0	. 2 ⊢ broda
2		df-fatci 447	. 2 ⊢ go 1 du'u broda kei fatci gi broda
3	1, 2	bi-rev 80	1 ⊢ 1 du'u broda kei fatci

Colors of variables: sumti selbri bridi

Syntax hints: 1 sdu 437 fatci sbfatci 446

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

This theorem depends on definitions: df-go 61 df-fatci 447

This theorem is referenced by: fatci-ceihi 450