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| Mirrors > Home > MPE Home > Th. List > ss2abi | Structured version Visualization version GIF version | ||
| Description: Inference of abstraction subclass from implication. (Contributed by NM, 31-Mar-1995.) Avoid ax-8 2146, ax-10 2177, ax-11 2193, ax-12 2212. (Revised by GG, 28-Jun-2024.) |
| Ref | Expression |
|---|---|
| ss2abi.1 | ⊢ (𝜑 → 𝜓) |
| Ref | Expression |
|---|---|
| ss2abi | ⊢ {𝑥 ∣ 𝜑} ⊆ {𝑥 ∣ 𝜓} |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ss2abi.1 | . . . 4 ⊢ (𝜑 → 𝜓) | |
| 2 | 1 | a1i 11 | . . 3 ⊢ (⊤ → (𝜑 → 𝜓)) |
| 3 | 2 | ss2abdv 3990 | . 2 ⊢ (⊤ → {𝑥 ∣ 𝜑} ⊆ {𝑥 ∣ 𝜓}) |
| 4 | 3 | mptru 1576 | 1 ⊢ {𝑥 ∣ 𝜑} ⊆ {𝑥 ∣ 𝜓} |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ⊤wtru 1570 {cab 2738 ⊆ wss 3895 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1572 df-ex 1812 df-sb 2099 df-clab 2739 df-ss 3896 |
| This theorem is used by: abssi 3993 rabssab 4010 abanssl 4256 abanssr 4257 pwpwssunieq 5063 intabs 5309 abssexg 5343 imassrnOLD 6068 fvclss 7245 mapex 7952 f1osetex 8884 fsetexb 8889 tc2 9744 htaOLD 9966 infmap2 10298 cflm 10330 cflim2 10344 hsmex3 10515 domtriomlem 10523 axdc3lem2 10532 brdom7disj 10613 brdom6disj 10614 npex 11074 hashf1lem2 14604 issubc 18015 symgbas 19591 symgbasfi 19598 tgval 23278 ustfn 24526 ustval 24527 ustn0 24545 birthdaylem1 27284 nosupno 28065 rgrprc 30177 wksfval 30195 mptctf 33355 measbase 34876 measval 34877 ismeas 34878 isrnmeas 34879 ballotlem2 35167 abweex 35769 subfaclefac 36027 satfvsuclem1 36210 dfon2lem1 36637 dfon2lem2 36638 poimirlem4 38635 poimirlem9 38640 poimirlem26 38657 poimirlem27 38658 poimirlem28 38659 poimirlem32 38663 sdclem2 38769 lineset 40888 lautset 41232 pautsetN 41248 tendoset 41909 eldiophb 43861 rmxyelqirr 44010 hbtlem1 44218 hbtlem7 44220 relopabVD 45976 rabexgf 46134 prprval 48689 upwlksfval 49326 |
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