Description: Alias for idALT that may be referenced in some older works, and kept here to prevent broken links.
If you landed here, please let the originating site and/or us know that the link that made you land here should be changed to a link to idALT .
(Contributed by NM, 30-Sep-1992) (Proof modification is discouraged.) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Assertion | id1 | ⊢ ( 𝜑 → 𝜑 ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | idALT | ⊢ ( 𝜑 → 𝜑 ) |