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Related theorems GIF version |
| Description: If x is not free in φ and ψ, it is not free in (φ ∧ ψ). |
| Ref | Expression |
|---|---|
| hb.1 | ⊢ (φ → ∀xφ) |
| hb.2 | ⊢ (ψ → ∀xψ) |
| Ref | Expression |
|---|---|
| hban | ⊢ ((φ ∧ ψ) → ∀x(φ ∧ ψ)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | hb.1 | . . . 4 ⊢ (φ → ∀xφ) | |
| 2 | hb.2 | . . . . 5 ⊢ (ψ → ∀xψ) | |
| 3 | 2 | hbne 699 | . . . 4 ⊢ (¬ ψ → ∀x ¬ ψ) |
| 4 | 1, 3 | hbim 702 | . . 3 ⊢ ((φ → ¬ ψ) → ∀x(φ → ¬ ψ)) |
| 5 | 4 | hbne 699 | . 2 ⊢ (¬ (φ → ¬ ψ) → ∀x ¬ (φ → ¬ ψ)) |
| 6 | df-an 198 | . 2 ⊢ ((φ ∧ ψ) ↔ ¬ (φ → ¬ ψ)) | |
| 7 | 6 | bial 695 | . 2 ⊢ (∀x(φ ∧ ψ) ↔ ∀x ¬ (φ → ¬ ψ)) |
| 8 | 5, 6, 7 | 3imtr4 192 | 1 ⊢ ((φ ∧ ψ) → ∀x(φ ∧ ψ)) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 1 → wi 2 ∧ wa 196 ∀wal 672 |
| This theorem is referenced by: hbbi 705 hb3an 707 19.21ad 741 eqvin.l1 851 hbsb4 905 ddelimf2 907 sbcom 916 cbval2 974 cbvex2 975 mopick 1054 hbel 1172 clelab 1187 bi2ralda 1232 hbrex 1238 hbrab 1311 cbvrex 1332 reu2 1338 eqvincf 1408 elrabf 1421 cbvrab 1425 axrep 1473 axrep2 1474 zfrep2 1475 zfrep3 1476 hbdif 1590 hbin 1647 hbuni 1925 eluniab 1926 reuuni2 1956 opabid 2099 cbvopab 2104 cbvopab1 2106 cbvopab1s 2107 hbopab 2111 onminex 2275 peano5 2394 hbxp 2444 hbco 2508 hbcnv 2516 hbima 2609 hbfun 2684 imadif 2714 hbfn 2720 hbf 2751 hbf1 2779 hbfo 2787 hbf1o 2798 fv3 2839 hbiso 2930 isotrALT 2936 tfr3 2964 hbrdg 2974 tz7.49 2997 cbvoprab12 3028 oprabval4g 3053 mapxpen 3390 xpmapenlem3 3393 xpmapenlem5 3395 nneneq 3408 ac6lem 3575 zornlem4 3606 zornlem5 3607 hta 3619 axextnd 3737 axrepndlem2 3739 axrepnd 3740 axunnd 3742 axpowndlem2 3744 axpowndlem4 3746 axpownd 3747 axregndlem2 3749 axregnd 3750 axinfndlem1 3751 axinfnd 3752 axacndlem4 3756 axacndlem5 3757 axacnd 3758 zfcndrep 3760 zfcndinf 3764 suppsr2 4017 suppsr3 4018 nnwof 4609 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-gen 677 |
| This theorem depends on definitions: df-bi 128 df-an 198 |