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Related theorems GIF version |
| Description: Inference from Theorem 19.21 of [Margaris] p. 90. |
| Ref | Expression |
|---|---|
| 19.21ai.1 | ⊢ (φ → ∀xφ) |
| 19.21ai.2 | ⊢ (φ → ψ) |
| Ref | Expression |
|---|---|
| 19.21ai | ⊢ (φ → ∀xψ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 19.21ai.1 | . 2 ⊢ (φ → ∀xφ) | |
| 2 | 19.21ai.2 | . . 3 ⊢ (φ → ψ) | |
| 3 | 2 | 19.20i 989 | . 2 ⊢ (∀xφ → ∀xψ) |
| 4 | 1, 3 | syl 10 | 1 ⊢ (φ → ∀xψ) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 ∀wal 951 |
| This theorem is referenced by: hbim 1004 19.12 1043 19.21 1052 19.21ad 1055 19.22d 1058 19.23 1059 19.23ad 1062 19.38 1077 nexd 1098 albid 1100 exbid 1101 hbnd 1105 ax11i 1134 sb6x 1184 equs5e 1194 aev 1204 sbbid 1241 dvelimdf 1246 sb6rf 1255 sb8 1256 a16g 1271 19.21aiv 1281 ax11f 1358 ax11indalem 1361 ax11inda2ALT 1362 a12lem1 1369 2moex 1433 2mo 1440 abbid 1568 r19.21ai 1704 ceqsalg 1816 ceqsex 1825 sbcbid 1966 csbeq2d 2008 hbcsb1g 2014 hbcsbg 2016 csbnestglem 2025 csbnest1g 2027 zfrepclf 2689 ssopab2 2811 dmcosseq 3349 imadif 3560 fnopabg 3601 hbfvd2 3716 axrepnd 4918 axunnd 4920 axpownd 4925 axregndlem1 4926 axacndlem1 4931 axacndlem2 4932 axacndlem3 4933 axacndlem4 4934 axacndlem5 4935 axacnd 4936 suppsr3 5196 chcmh 9034 homcard 10426 imonclem 10583 ismonc 10584 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-mp 7 ax-gen 960 ax-4 970 ax-5o 972 |