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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 5846 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 ↾ 𝐴) ⊆ (𝐶 ↾ 𝐵)) | |
2 | rnss 5773 | . . 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 5532 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
5 | df-ima 5532 | . 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵) | |
6 | 3, 4, 5 | 3sstr4g 3960 | 1 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 “ 𝐴) ⊆ (𝐶 “ 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ⊆ wss 3881 ran crn 5520 ↾ cres 5521 “ cima 5522 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-rab 3115 df-v 3443 df-un 3886 df-in 3888 df-ss 3898 df-sn 4526 df-pr 4528 df-op 4532 df-br 5031 df-opab 5093 df-xp 5525 df-cnv 5527 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 |
This theorem is referenced by: funimass1 6406 funimass2 6407 fvimacnv 6800 fnfvimad 6974 f1imass 7000 ecinxp 8355 sbthlem1 8611 sbthlem2 8612 php3 8687 ordtypelem2 8967 tcrank 9297 limsupgord 14821 isercoll 15016 isacs1i 16920 gsumzf1o 19025 dprdres 19143 dprd2da 19157 dmdprdsplit2lem 19160 lmhmlsp 19814 f1lindf 20511 iscnp4 21868 cnpco 21872 cncls2i 21875 cnntri 21876 cnrest2 21891 cnpresti 21893 cnprest 21894 1stcfb 22050 xkococnlem 22264 qtopval2 22301 tgqtop 22317 qtoprest 22322 kqdisj 22337 regr1lem 22344 kqreglem1 22346 kqreglem2 22347 kqnrmlem1 22348 kqnrmlem2 22349 nrmhmph 22399 fbasrn 22489 elfm2 22553 fmfnfmlem1 22559 fmco 22566 flffbas 22600 cnpflf2 22605 cnextcn 22672 metcnp3 23147 metustto 23160 cfilucfil 23166 uniioombllem3 24189 dyadmbllem 24203 mbfconstlem 24231 i1fima2 24283 itg2gt0 24364 ellimc3 24482 limcflf 24484 limcresi 24488 limciun 24497 lhop 24619 ig1peu 24772 ig1pdvds 24777 psercnlem2 25019 dvloglem 25239 efopn 25249 fnpreimac 30434 fsuppinisegfi 30447 gsumpart 30740 txomap 31187 zarcmplem 31234 tpr2rico 31265 pthhashvtx 32487 cvmsss2 32634 cvmopnlem 32638 cvmliftmolem1 32641 cvmliftlem15 32658 cvmlift2lem9 32671 imadifss 35032 poimirlem1 35058 poimirlem2 35059 poimirlem3 35060 poimirlem15 35072 poimirlem30 35087 dvtan 35107 heibor1lem 35247 isnumbasabl 40050 isnumbasgrp 40051 dfacbasgrp 40052 trclimalb2 40427 frege81d 40448 imass2d 41901 limccog 42262 liminfgord 42396 |
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