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| Mirrors > Home > ILE Home > Th. List > fssd | GIF version | ||
| Description: Expanding the codomain of a mapping, deduction form. (Contributed by Glauco Siliprandi, 11-Dec-2019.) |
| Ref | Expression |
|---|---|
| fssd.f | ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) |
| fssd.b | ⊢ (𝜑 → 𝐵 ⊆ 𝐶) |
| Ref | Expression |
|---|---|
| fssd | ⊢ (𝜑 → 𝐹:𝐴⟶𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fssd.f | . 2 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) | |
| 2 | fssd.b | . 2 ⊢ (𝜑 → 𝐵 ⊆ 𝐶) | |
| 3 | fss 5494 | . 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐵 ⊆ 𝐶) → 𝐹:𝐴⟶𝐶) | |
| 4 | 1, 2, 3 | syl2anc 411 | 1 ⊢ (𝜑 → 𝐹:𝐴⟶𝐶) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ⊆ wss 3200 ⟶wf 5322 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-11 1554 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-in 3206 df-ss 3213 df-f 5330 |
| This theorem is referenced by: mapss 6859 ac6sfi 7086 fseq1p1m1 10328 seqf1oglem2 10781 sswrd 11121 resqrexlemcvg 11579 resqrexlemsqa 11584 climcvg1nlem 11909 fsumcl2lem 11958 nninfctlemfo 12610 ennnfonelemh 13024 gsumress 13477 gsumwsubmcl 13578 gsumfzsubmcl 13924 cnrest2 14959 cnptoprest2 14963 cncfss 15306 limccnpcntop 15398 dvidre 15420 dvcoapbr 15430 dvef 15450 plyaddlem 15472 plymullem 15473 plycjlemc 15483 plycn 15485 dvply2g 15489 upgruhgr 15961 umgrupgr 15962 upgr1edc 15971 umgrislfupgrdom 15981 usgrislfuspgrdom 16040 isomninnlem 16634 trilpolemisumle 16642 iswomninnlem 16653 ismkvnnlem 16656 |
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