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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 5549 | . 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐵 ⊆ 𝐶) → 𝐹:𝐴⟶𝐶) | |
| 4 | 1, 2, 3 | syl2anc 415 | 1 ⊢ (𝜑 → 𝐹:𝐴⟶𝐶) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ⊆ wss 3220 ⟶wf 5376 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-11 1559 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-in 3226 df-ss 3233 df-f 5384 |
| This theorem is used by: mapsnd 6974 mapss 6977 ac6sfi 7206 fseq1p1m1 10518 seqf1oglem2 10978 sswrd 11335 resqrexlemcvg 11807 resqrexlemsqa 11812 climcvg1nlem 12140 fsumcl2lem 12190 nninfctlemfo 12842 ennnfonelemh 13353 gzsumress 13771 gzsumwsubmcl 13860 gzsumsubmcl 14232 gsumsubmclfi 14253 gsumressfi 14267 psrbaglefifi 15172 cnrest2 15462 cnptoprest2 15466 cncfss 15809 limccnpcntop 15901 dvidre 15923 dvcoapbr 15933 dvef 15953 plyaddlem 15975 plymullem 15976 plycjlemc 15986 plycn 15988 dvply2g 15992 upgruhgr 16557 umgrupgr 16558 upgr1edc 16567 umgrislfupgrdom 16577 usgrislfuspgrdom 16636 isomninnlem 17285 trilpolemisumle 17294 iswomninnlem 17306 ismkvnnlem 17309 |
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