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| Mirrors > Home > MPE Home > Th. List > imass2 | Structured version Visualization version GIF version | ||
| Description: Subset theorem for image. Exercise 22(a) of [Enderton] p. 53. (Contributed by NM, 22-Mar-1998.) |
| Ref | Expression |
|---|---|
| imass2 | ⊢ (𝐴 ⊆ 𝐵 → (𝐶 “ 𝐴) ⊆ (𝐶 “ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssres2 5950 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 ↾ 𝐴) ⊆ (𝐶 ↾ 𝐵)) | |
| 2 | rnss 5876 | . . 3 ⊢ ((𝐶 ↾ 𝐴) ⊆ (𝐶 ↾ 𝐵) → ran (𝐶 ↾ 𝐴) ⊆ ran (𝐶 ↾ 𝐵)) | |
| 3 | 1, 2 | syl 17 | . 2 ⊢ (𝐴 ⊆ 𝐵 → ran (𝐶 ↾ 𝐴) ⊆ ran (𝐶 ↾ 𝐵)) |
| 4 | df-ima 5627 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
| 5 | df-ima 5627 | . 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵) | |
| 6 | 3, 4, 5 | 3sstr4g 3986 | 1 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 “ 𝐴) ⊆ (𝐶 “ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ⊆ wss 3900 ran crn 5615 ↾ cres 5616 “ cima 5617 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2112 ax-9 2120 ax-ext 2702 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2067 df-clab 2709 df-cleq 2722 df-clel 2804 df-rab 3394 df-v 3436 df-dif 3903 df-un 3905 df-in 3907 df-ss 3917 df-nul 4282 df-if 4474 df-sn 4575 df-pr 4577 df-op 4581 df-br 5090 df-opab 5152 df-xp 5620 df-cnv 5622 df-dm 5624 df-rn 5625 df-res 5626 df-ima 5627 |
| This theorem is referenced by: funimass1 6559 funimass2 6560 fvimacnv 6981 fnfvimad 7163 f1imass 7193 ecinxp 8711 sbthlem1 8995 sbthlem2 8996 php3 9113 ordtypelem2 9400 tcrank 9769 limsupgord 15371 isercoll 15567 isacs1i 17555 gsumzf1o 19817 dprdres 19935 dprd2da 19949 dmdprdsplit2lem 19952 lmhmlsp 20976 f1lindf 21752 iscnp4 23171 cnpco 23175 cncls2i 23178 cnntri 23179 cnrest2 23194 cnpresti 23196 cnprest 23197 1stcfb 23353 xkococnlem 23567 qtopval2 23604 tgqtop 23620 qtoprest 23625 kqdisj 23640 regr1lem 23647 kqreglem1 23649 kqreglem2 23650 kqnrmlem1 23651 kqnrmlem2 23652 nrmhmph 23702 fbasrn 23792 elfm2 23856 fmfnfmlem1 23862 fmco 23869 flffbas 23903 cnpflf2 23908 cnextcn 23975 metcnp3 24448 metustto 24461 cfilucfil 24467 uniioombllem3 25506 dyadmbllem 25520 mbfconstlem 25548 i1fima2 25600 itg2gt0 25681 ellimc3 25800 limcflf 25802 limcresi 25806 limciun 25815 lhop 25941 ig1peu 26100 ig1pdvds 26105 psercnlem2 26354 dvloglem 26577 efopn 26587 noetalem1 27673 madess 27814 oldss 27816 cofcut1 27857 negsproplem2 27964 bdayon 28202 fnpreimac 32643 fsuppinisegfi 32658 gsumpart 33027 elrgspnsubrunlem2 33205 txomap 33837 zarcmplem 33884 tpr2rico 33915 pthhashvtx 35140 cvmsss2 35286 cvmopnlem 35290 cvmliftmolem1 35293 cvmliftlem15 35310 cvmlift2lem9 35323 imadifss 37614 poimirlem1 37640 poimirlem2 37641 poimirlem3 37642 poimirlem15 37654 poimirlem30 37669 dvtan 37689 heibor1lem 37828 aks6d1c2 42142 aks6d1c6lem3 42184 aks6d1c6lem5 42189 isnumbasabl 43118 isnumbasgrp 43119 dfacbasgrp 43120 trclimalb2 43738 frege81d 43759 imass2d 45277 limccog 45639 liminfgord 45771 uhgrimisgrgriclem 47940 clnbgrgrim 47944 |
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