Description: Bound variable hypothesis builder for transitive closure. (Contributed by Scott Fenton, 17-Oct-2024)
| Ref | Expression | ||
|---|---|---|---|
| Hypothesis | nfttrcl.1 | |- F/_ x R |
|
| Assertion | nfttrcl | |- F/_ x t++ R |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nfttrcl.1 | |- F/_ x R |
|
| 2 | 1 | a1i | |- ( T. -> F/_ x R ) |
| 3 | 2 | nfttrcld | |- ( T. -> F/_ x t++ R ) |
| 4 | 3 | mptru | |- F/_ x t++ R |