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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 6005 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 ↾ 𝐴) ⊆ (𝐶 ↾ 𝐵)) | |
| 2 | rnss 5931 | . . 3 ⊢ ((𝐶 ↾ 𝐴) ⊆ (𝐶 ↾ 𝐵) → ran (𝐶 ↾ 𝐴) ⊆ ran (𝐶 ↾ 𝐵)) | |
| 3 | 1, 2 | syl 18 | . 2 ⊢ (𝐴 ⊆ 𝐵 → ran (𝐶 ↾ 𝐴) ⊆ ran (𝐶 ↾ 𝐵)) |
| 4 | df-ima 5676 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
| 5 | df-ima 5676 | . 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵) | |
| 6 | 3, 4, 5 | 3sstr4g 3991 | 1 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 “ 𝐴) ⊆ (𝐶 “ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ⊆ wss 3906 ran crn 5664 ↾ cres 5665 “ cima 5666 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-rab 3417 df-v 3457 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-sn 4591 df-pr 4593 df-op 4597 df-br 5111 df-opab 5175 df-xp 5669 df-cnv 5671 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 |
| This theorem is referenced by: funimass1 6620 funimass2 6621 fvimacnv 7050 fnfvimad 7234 f1imass 7264 ecinxp 8791 sbthlem1 9076 sbthlem2 9077 php3 9194 ordtypelem2 9482 tcrank 9857 limsupgord 15525 isercoll 15721 isacs1i 17714 gsumzf1o 19983 dprdres 20101 dprd2da 20115 dmdprdsplit2lem 20118 lmhmlsp 21151 f1lindf 21953 iscnp4 23401 cnpco 23405 cncls2i 23408 cnntri 23409 cnrest2 23424 cnpresti 23426 cnprest 23427 1stcfb 23583 xkococnlem 23797 qtopval2 23834 tgqtop 23850 qtoprest 23855 kqdisj 23870 regr1lem 23877 kqreglem1 23879 kqreglem2 23880 kqnrmlem1 23881 kqnrmlem2 23882 nrmhmph 23932 fbasrn 24022 elfm2 24086 fmfnfmlem1 24092 fmco 24099 flffbas 24133 cnpflf2 24138 cnextcn 24205 metcnp3 24678 metustto 24691 cfilucfil 24697 uniioombllem3 25725 dyadmbllem 25739 mbfconstlem 25767 i1fima2 25819 itg2gt0 25900 ellimc3 26019 limcflf 26021 limcresi 26025 limciun 26034 lhop 26156 ig1peu 26313 ig1pdvds 26318 psercnlem2 26565 dvloglem 26791 efopn 26801 noetalem1 27883 madess 28037 oldss 28041 cofcut1 28091 negsproplem2 28200 bdayons 28447 fnpreimac 32993 fsuppinisegfi 33010 gsumpart 33361 elrgspnsubrunlem2 33546 txomap 34202 zarcmplem 34249 tpr2rico 34280 pthhashvtx 35598 cvmsss2 35744 cvmopnlem 35748 cvmliftmolem1 35751 cvmliftlem15 35768 cvmlift2lem9 35781 imadifss 38224 poimirlem1 38250 poimirlem2 38251 poimirlem3 38252 poimirlem15 38264 poimirlem30 38279 dvtan 38299 heibor1lem 38438 aks6d1c2 42875 aks6d1c6lem3 42917 aks6d1c6lem5 42922 isnumbasabl 43813 isnumbasgrp 43814 dfacbasgrp 43815 trclimalb2 44432 frege81d 44453 imass2d 45956 limccog 46316 liminfgord 46448 uhgrimisgrgriclem 48672 clnbgrgrim 48676 |
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