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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 5875 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 ↾ 𝐴) ⊆ (𝐶 ↾ 𝐵)) | |
2 | rnss 5803 | . . 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 5562 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
5 | df-ima 5562 | . 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵) | |
6 | 3, 4, 5 | 3sstr4g 4011 | 1 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 “ 𝐴) ⊆ (𝐶 “ 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ⊆ wss 3935 ran crn 5550 ↾ cres 5551 “ cima 5552 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-rab 3147 df-v 3496 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-sn 4561 df-pr 4563 df-op 4567 df-br 5059 df-opab 5121 df-xp 5555 df-cnv 5557 df-dm 5559 df-rn 5560 df-res 5561 df-ima 5562 |
This theorem is referenced by: funimass1 6430 funimass2 6431 fvimacnv 6817 fnfvimad 6990 f1imass 7016 ecinxp 8366 sbthlem1 8621 sbthlem2 8622 php3 8697 ordtypelem2 8977 tcrank 9307 limsupgord 14823 isercoll 15018 isacs1i 16922 gsumzf1o 19026 dprdres 19144 dprd2da 19158 dmdprdsplit2lem 19161 lmhmlsp 19815 f1lindf 20960 iscnp4 21865 cnpco 21869 cncls2i 21872 cnntri 21873 cnrest2 21888 cnpresti 21890 cnprest 21891 1stcfb 22047 xkococnlem 22261 qtopval2 22298 tgqtop 22314 qtoprest 22319 kqdisj 22334 regr1lem 22341 kqreglem1 22343 kqreglem2 22344 kqnrmlem1 22345 kqnrmlem2 22346 nrmhmph 22396 fbasrn 22486 elfm2 22550 fmfnfmlem1 22556 fmco 22563 flffbas 22597 cnpflf2 22602 cnextcn 22669 metcnp3 23144 metustto 23157 cfilucfil 23163 uniioombllem3 24180 dyadmbllem 24194 mbfconstlem 24222 i1fima2 24274 itg2gt0 24355 ellimc3 24471 limcflf 24473 limcresi 24477 limciun 24486 lhop 24607 ig1peu 24759 ig1pdvds 24764 psercnlem2 25006 dvloglem 25225 efopn 25235 fnpreimac 30410 txomap 31093 tpr2rico 31150 pthhashvtx 32369 cvmsss2 32516 cvmopnlem 32520 cvmliftmolem1 32523 cvmliftlem15 32540 cvmlift2lem9 32553 imadifss 34861 poimirlem1 34887 poimirlem2 34888 poimirlem3 34889 poimirlem15 34901 poimirlem30 34916 dvtan 34936 heibor1lem 35081 isnumbasabl 39699 isnumbasgrp 39700 dfacbasgrp 39701 trclimalb2 40064 frege81d 40085 imass2d 41529 limccog 41894 liminfgord 42028 |
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