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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 5638 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
| 5 | df-ima 5638 | . 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵) | |
| 6 | 3, 4, 5 | 3sstr4g 3975 | 1 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 “ 𝐴) ⊆ (𝐶 “ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ⊆ wss 3890 ran crn 5626 ↾ cres 5627 “ cima 5628 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2712 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2719 df-cleq 2732 df-clel 2815 df-rab 3393 df-v 3434 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4269 df-if 4462 df-sn 4563 df-pr 4565 df-op 4569 df-br 5080 df-opab 5142 df-xp 5631 df-cnv 5633 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 |
| This theorem is referenced by: funimass1 6574 funimass2 6575 fvimacnv 7001 fnfvimad 7185 f1imass 7215 ecinxp 8736 sbthlem1 9022 sbthlem2 9023 php3 9140 ordtypelem2 9431 tcrank 9806 limsupgord 15432 isercoll 15628 isacs1i 17621 gsumzf1o 19885 dprdres 20003 dprd2da 20017 dmdprdsplit2lem 20020 lmhmlsp 21046 f1lindf 21804 iscnp4 23253 cnpco 23257 cncls2i 23260 cnntri 23261 cnrest2 23276 cnpresti 23278 cnprest 23279 1stcfb 23435 xkococnlem 23649 qtopval2 23686 tgqtop 23702 qtoprest 23707 kqdisj 23722 regr1lem 23729 kqreglem1 23731 kqreglem2 23732 kqnrmlem1 23733 kqnrmlem2 23734 nrmhmph 23784 fbasrn 23874 elfm2 23938 fmfnfmlem1 23944 fmco 23951 flffbas 23985 cnpflf2 23990 cnextcn 24057 metcnp3 24530 metustto 24543 cfilucfil 24549 uniioombllem3 25577 dyadmbllem 25591 mbfconstlem 25619 i1fima2 25671 itg2gt0 25752 ellimc3 25871 limcflf 25873 limcresi 25877 limciun 25886 lhop 26008 ig1peu 26165 ig1pdvds 26170 psercnlem2 26414 dvloglem 26637 efopn 26647 noetalem1 27730 madess 27883 oldss 27887 cofcut1 27937 negsproplem2 28046 bdayons 28293 fnpreimac 32769 fsuppinisegfi 32786 gsumpart 33151 elrgspnsubrunlem2 33336 txomap 34025 zarcmplem 34072 tpr2rico 34103 pthhashvtx 35363 cvmsss2 35509 cvmopnlem 35513 cvmliftmolem1 35516 cvmliftlem15 35533 cvmlift2lem9 35546 imadifss 37969 poimirlem1 37995 poimirlem2 37996 poimirlem3 37997 poimirlem15 38009 poimirlem30 38024 dvtan 38044 heibor1lem 38183 aks6d1c2 42622 aks6d1c6lem3 42664 aks6d1c6lem5 42669 isnumbasabl 43558 isnumbasgrp 43559 dfacbasgrp 43560 trclimalb2 44177 frege81d 44198 imass2d 45712 limccog 46072 liminfgord 46204 uhgrimisgrgriclem 48428 clnbgrgrim 48432 |
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