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Mirrors > Home > ILE Home > Th. List > nfci | Unicode version |
Description: Deduce that a class does not have free in it. (Contributed by Mario Carneiro, 11-Aug-2016.) |
Ref | Expression |
---|---|
nfci.1 |
Ref | Expression |
---|---|
nfci |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-nfc 2208 | . 2 | |
2 | nfci.1 | . 2 | |
3 | 1, 2 | mpgbir 1382 | 1 |
Colors of variables: wff set class |
Syntax hints: wnf 1389 wcel 1433 wnfc 2206 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-gen 1378 |
This theorem depends on definitions: df-bi 115 df-nfc 2208 |
This theorem is referenced by: nfcii 2210 nfcv 2219 nfab1 2221 nfab 2223 |
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