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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 5988 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 ↾ 𝐴) ⊆ (𝐶 ↾ 𝐵)) | |
| 2 | rnss 5913 | . . 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 5658 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
| 5 | df-ima 5658 | . 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 3904 ran crn 5646 ↾ cres 5647 “ cima 5648 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-ext 2733 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-sb 2090 df-clab 2740 df-cleq 2753 df-clel 2836 df-rab 3414 df-v 3455 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4480 df-sn 4582 df-pr 4584 df-op 4588 df-br 5100 df-opab 5162 df-xp 5651 df-cnv 5653 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 |
| This theorem is referenced by: funimass1 6599 funimass2 6600 fvimacnv 7030 fnfvimad 7214 f1imass 7244 ecinxp 8769 sbthlem1 9055 sbthlem2 9056 php3 9173 ordtypelem2 9464 tcrank 9839 limsupgord 15482 isercoll 15678 isacs1i 17672 gsumzf1o 19935 dprdres 20053 dprd2da 20067 dmdprdsplit2lem 20070 lmhmlsp 21096 f1lindf 21854 iscnp4 23303 cnpco 23307 cncls2i 23310 cnntri 23311 cnrest2 23326 cnpresti 23328 cnprest 23329 1stcfb 23485 xkococnlem 23699 qtopval2 23736 tgqtop 23752 qtoprest 23757 kqdisj 23772 regr1lem 23779 kqreglem1 23781 kqreglem2 23782 kqnrmlem1 23783 kqnrmlem2 23784 nrmhmph 23834 fbasrn 23924 elfm2 23988 fmfnfmlem1 23994 fmco 24001 flffbas 24035 cnpflf2 24040 cnextcn 24107 metcnp3 24580 metustto 24593 cfilucfil 24599 uniioombllem3 25627 dyadmbllem 25641 mbfconstlem 25669 i1fima2 25721 itg2gt0 25802 ellimc3 25921 limcflf 25923 limcresi 25927 limciun 25936 lhop 26058 ig1peu 26215 ig1pdvds 26220 psercnlem2 26464 dvloglem 26690 efopn 26700 noetalem1 27782 madess 27936 oldss 27940 cofcut1 27990 negsproplem2 28099 bdayons 28346 fnpreimac 32822 fsuppinisegfi 32839 gsumpart 33204 elrgspnsubrunlem2 33390 txomap 34092 zarcmplem 34139 tpr2rico 34170 pthhashvtx 35442 cvmsss2 35588 cvmopnlem 35592 cvmliftmolem1 35595 cvmliftlem15 35612 cvmlift2lem9 35625 imadifss 38058 poimirlem1 38084 poimirlem2 38085 poimirlem3 38086 poimirlem15 38098 poimirlem30 38113 dvtan 38133 heibor1lem 38272 aks6d1c2 42711 aks6d1c6lem3 42753 aks6d1c6lem5 42758 isnumbasabl 43647 isnumbasgrp 43648 dfacbasgrp 43649 trclimalb2 44266 frege81d 44287 imass2d 45800 limccog 46160 liminfgord 46292 uhgrimisgrgriclem 48516 clnbgrgrim 48520 |
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