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Mirrors > Home > MPE Home > Th. List > nfim | Structured version Visualization version Unicode version |
Description: If is not free in and , it is not free in . Inference associated with nfimt 1821. (Contributed by Mario Carneiro, 11-Aug-2016.) (Proof shortened by Wolf Lammen, 2-Jan-2018.) df-nf 1710 changed. (Revised by Wolf Lammen, 17-Sep-2021.) |
Ref | Expression |
---|---|
nfim.1 | |
nfim.2 |
Ref | Expression |
---|---|
nfim |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfim.1 | . 2 | |
2 | nfim.2 | . 2 | |
3 | nfimt2 1822 | . 2 | |
4 | 1, 2, 3 | mp2an 708 | 1 |
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