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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 5969 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 ↾ 𝐴) ⊆ (𝐶 ↾ 𝐵)) | |
| 2 | rnss 5894 | . . 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 5644 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
| 5 | df-ima 5644 | . 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 3889 ran crn 5632 ↾ cres 5633 “ cima 5634 |
| 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 2708 |
| 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 2715 df-cleq 2728 df-clel 2811 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-br 5086 df-opab 5148 df-xp 5637 df-cnv 5639 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 |
| This theorem is referenced by: funimass1 6580 funimass2 6581 fvimacnv 7005 fnfvimad 7189 f1imass 7219 ecinxp 8739 sbthlem1 9025 sbthlem2 9026 php3 9143 ordtypelem2 9434 tcrank 9808 limsupgord 15434 isercoll 15630 isacs1i 17623 gsumzf1o 19887 dprdres 20005 dprd2da 20019 dmdprdsplit2lem 20022 lmhmlsp 21044 f1lindf 21802 iscnp4 23228 cnpco 23232 cncls2i 23235 cnntri 23236 cnrest2 23251 cnpresti 23253 cnprest 23254 1stcfb 23410 xkococnlem 23624 qtopval2 23661 tgqtop 23677 qtoprest 23682 kqdisj 23697 regr1lem 23704 kqreglem1 23706 kqreglem2 23707 kqnrmlem1 23708 kqnrmlem2 23709 nrmhmph 23759 fbasrn 23849 elfm2 23913 fmfnfmlem1 23919 fmco 23926 flffbas 23960 cnpflf2 23965 cnextcn 24032 metcnp3 24505 metustto 24518 cfilucfil 24524 uniioombllem3 25552 dyadmbllem 25566 mbfconstlem 25594 i1fima2 25646 itg2gt0 25727 ellimc3 25846 limcflf 25848 limcresi 25852 limciun 25861 lhop 25983 ig1peu 26140 ig1pdvds 26145 psercnlem2 26389 dvloglem 26612 efopn 26622 noetalem1 27705 madess 27858 oldss 27862 cofcut1 27912 negsproplem2 28021 bdayons 28268 fnpreimac 32743 fsuppinisegfi 32760 gsumpart 33124 elrgspnsubrunlem2 33309 txomap 33978 zarcmplem 34025 tpr2rico 34056 pthhashvtx 35310 cvmsss2 35456 cvmopnlem 35460 cvmliftmolem1 35463 cvmliftlem15 35480 cvmlift2lem9 35493 imadifss 37916 poimirlem1 37942 poimirlem2 37943 poimirlem3 37944 poimirlem15 37956 poimirlem30 37971 dvtan 37991 heibor1lem 38130 aks6d1c2 42569 aks6d1c6lem3 42611 aks6d1c6lem5 42616 isnumbasabl 43534 isnumbasgrp 43535 dfacbasgrp 43536 trclimalb2 44153 frege81d 44174 imass2d 45690 limccog 46050 liminfgord 46182 uhgrimisgrgriclem 48406 clnbgrgrim 48410 |
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