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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 5963 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 ↾ 𝐴) ⊆ (𝐶 ↾ 𝐵)) | |
| 2 | rnss 5888 | . . 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 5637 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
| 5 | df-ima 5637 | . 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵) | |
| 6 | 3, 4, 5 | 3sstr4g 3976 | 1 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 “ 𝐴) ⊆ (𝐶 “ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ⊆ wss 3890 ran crn 5625 ↾ cres 5626 “ cima 5627 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-br 5087 df-opab 5149 df-xp 5630 df-cnv 5632 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 |
| This theorem is referenced by: funimass1 6574 funimass2 6575 fvimacnv 6999 fnfvimad 7182 f1imass 7212 ecinxp 8732 sbthlem1 9018 sbthlem2 9019 php3 9136 ordtypelem2 9427 tcrank 9799 limsupgord 15425 isercoll 15621 isacs1i 17614 gsumzf1o 19878 dprdres 19996 dprd2da 20010 dmdprdsplit2lem 20013 lmhmlsp 21036 f1lindf 21812 iscnp4 23238 cnpco 23242 cncls2i 23245 cnntri 23246 cnrest2 23261 cnpresti 23263 cnprest 23264 1stcfb 23420 xkococnlem 23634 qtopval2 23671 tgqtop 23687 qtoprest 23692 kqdisj 23707 regr1lem 23714 kqreglem1 23716 kqreglem2 23717 kqnrmlem1 23718 kqnrmlem2 23719 nrmhmph 23769 fbasrn 23859 elfm2 23923 fmfnfmlem1 23929 fmco 23936 flffbas 23970 cnpflf2 23975 cnextcn 24042 metcnp3 24515 metustto 24528 cfilucfil 24534 uniioombllem3 25562 dyadmbllem 25576 mbfconstlem 25604 i1fima2 25656 itg2gt0 25737 ellimc3 25856 limcflf 25858 limcresi 25862 limciun 25871 lhop 25993 ig1peu 26150 ig1pdvds 26155 psercnlem2 26402 dvloglem 26625 efopn 26635 noetalem1 27719 madess 27872 oldss 27876 cofcut1 27926 negsproplem2 28035 bdayons 28282 fnpreimac 32758 fsuppinisegfi 32775 gsumpart 33139 elrgspnsubrunlem2 33324 txomap 33994 zarcmplem 34041 tpr2rico 34072 pthhashvtx 35326 cvmsss2 35472 cvmopnlem 35476 cvmliftmolem1 35479 cvmliftlem15 35496 cvmlift2lem9 35509 imadifss 37930 poimirlem1 37956 poimirlem2 37957 poimirlem3 37958 poimirlem15 37970 poimirlem30 37985 dvtan 38005 heibor1lem 38144 aks6d1c2 42583 aks6d1c6lem3 42625 aks6d1c6lem5 42630 isnumbasabl 43552 isnumbasgrp 43553 dfacbasgrp 43554 trclimalb2 44171 frege81d 44192 imass2d 45708 limccog 46068 liminfgord 46200 uhgrimisgrgriclem 48418 clnbgrgrim 48422 |
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