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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 5971 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 ↾ 𝐴) ⊆ (𝐶 ↾ 𝐵)) | |
| 2 | rnss 5896 | . . 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 5645 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
| 5 | df-ima 5645 | . 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵) | |
| 6 | 3, 4, 5 | 3sstr4g 3989 | 1 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 “ 𝐴) ⊆ (𝐶 “ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ⊆ wss 3903 ran crn 5633 ↾ cres 5634 “ cima 5635 |
| 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 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-br 5101 df-opab 5163 df-xp 5638 df-cnv 5640 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 |
| This theorem is referenced by: funimass1 6582 funimass2 6583 fvimacnv 7007 fnfvimad 7190 f1imass 7220 ecinxp 8741 sbthlem1 9027 sbthlem2 9028 php3 9145 ordtypelem2 9436 tcrank 9808 limsupgord 15407 isercoll 15603 isacs1i 17592 gsumzf1o 19853 dprdres 19971 dprd2da 19985 dmdprdsplit2lem 19988 lmhmlsp 21013 f1lindf 21789 iscnp4 23219 cnpco 23223 cncls2i 23226 cnntri 23227 cnrest2 23242 cnpresti 23244 cnprest 23245 1stcfb 23401 xkococnlem 23615 qtopval2 23652 tgqtop 23668 qtoprest 23673 kqdisj 23688 regr1lem 23695 kqreglem1 23697 kqreglem2 23698 kqnrmlem1 23699 kqnrmlem2 23700 nrmhmph 23750 fbasrn 23840 elfm2 23904 fmfnfmlem1 23910 fmco 23917 flffbas 23951 cnpflf2 23956 cnextcn 24023 metcnp3 24496 metustto 24509 cfilucfil 24515 uniioombllem3 25554 dyadmbllem 25568 mbfconstlem 25596 i1fima2 25648 itg2gt0 25729 ellimc3 25848 limcflf 25850 limcresi 25854 limciun 25863 lhop 25989 ig1peu 26148 ig1pdvds 26153 psercnlem2 26402 dvloglem 26625 efopn 26635 noetalem1 27721 madess 27874 oldss 27878 cofcut1 27928 negsproplem2 28037 bdayons 28284 fnpreimac 32759 fsuppinisegfi 32776 gsumpart 33156 elrgspnsubrunlem2 33341 txomap 34011 zarcmplem 34058 tpr2rico 34089 pthhashvtx 35341 cvmsss2 35487 cvmopnlem 35491 cvmliftmolem1 35494 cvmliftlem15 35511 cvmlift2lem9 35524 imadifss 37840 poimirlem1 37866 poimirlem2 37867 poimirlem3 37868 poimirlem15 37880 poimirlem30 37895 dvtan 37915 heibor1lem 38054 aks6d1c2 42494 aks6d1c6lem3 42536 aks6d1c6lem5 42541 isnumbasabl 43457 isnumbasgrp 43458 dfacbasgrp 43459 trclimalb2 44076 frege81d 44097 imass2d 45613 limccog 45974 liminfgord 46106 uhgrimisgrgriclem 48284 clnbgrgrim 48288 |
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