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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 5994 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 ↾ 𝐴) ⊆ (𝐶 ↾ 𝐵)) | |
| 2 | rnss 5920 | . . 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 5665 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
| 5 | df-ima 5665 | . 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵) | |
| 6 | 3, 4, 5 | 3sstr4g 3992 | 1 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 “ 𝐴) ⊆ (𝐶 “ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ⊆ wss 3907 ran crn 5653 ↾ cres 5654 “ cima 5655 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-ext 2737 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-sb 2094 df-clab 2744 df-cleq 2757 df-clel 2840 df-rab 3418 df-v 3459 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-sn 4586 df-pr 4588 df-op 4592 df-br 5106 df-opab 5168 df-xp 5658 df-cnv 5660 df-dm 5662 df-rn 5663 df-res 5664 df-ima 5665 |
| This theorem is referenced by: funimass1 6607 funimass2 6608 fvimacnv 7038 fnfvimad 7222 f1imass 7252 ecinxp 8778 sbthlem1 9063 sbthlem2 9064 php3 9181 ordtypelem2 9469 tcrank 9844 limsupgord 15513 isercoll 15709 isacs1i 17703 gsumzf1o 19973 dprdres 20091 dprd2da 20105 dmdprdsplit2lem 20108 lmhmlsp 21139 f1lindf 21932 iscnp4 23381 cnpco 23385 cncls2i 23388 cnntri 23389 cnrest2 23404 cnpresti 23406 cnprest 23407 1stcfb 23563 xkococnlem 23777 qtopval2 23814 tgqtop 23830 qtoprest 23835 kqdisj 23850 regr1lem 23857 kqreglem1 23859 kqreglem2 23860 kqnrmlem1 23861 kqnrmlem2 23862 nrmhmph 23912 fbasrn 24002 elfm2 24066 fmfnfmlem1 24072 fmco 24079 flffbas 24113 cnpflf2 24118 cnextcn 24185 metcnp3 24658 metustto 24671 cfilucfil 24677 uniioombllem3 25705 dyadmbllem 25719 mbfconstlem 25747 i1fima2 25799 itg2gt0 25880 ellimc3 25999 limcflf 26001 limcresi 26005 limciun 26014 lhop 26136 ig1peu 26293 ig1pdvds 26298 psercnlem2 26545 dvloglem 26771 efopn 26781 noetalem1 27863 madess 28017 oldss 28021 cofcut1 28071 negsproplem2 28180 bdayons 28427 fnpreimac 32927 fsuppinisegfi 32944 gsumpart 33296 elrgspnsubrunlem2 33481 txomap 34141 zarcmplem 34188 tpr2rico 34219 pthhashvtx 35491 cvmsss2 35637 cvmopnlem 35641 cvmliftmolem1 35644 cvmliftlem15 35661 cvmlift2lem9 35674 imadifss 38106 poimirlem1 38132 poimirlem2 38133 poimirlem3 38134 poimirlem15 38146 poimirlem30 38161 dvtan 38181 heibor1lem 38320 aks6d1c2 42759 aks6d1c6lem3 42801 aks6d1c6lem5 42806 isnumbasabl 43695 isnumbasgrp 43696 dfacbasgrp 43697 trclimalb2 44314 frege81d 44335 imass2d 45834 limccog 46194 liminfgord 46326 uhgrimisgrgriclem 48550 clnbgrgrim 48554 |
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