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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 5881 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 ↾ 𝐴) ⊆ (𝐶 ↾ 𝐵)) | |
2 | rnss 5809 | . . 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 5568 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
5 | df-ima 5568 | . 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵) | |
6 | 3, 4, 5 | 3sstr4g 4012 | 1 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 “ 𝐴) ⊆ (𝐶 “ 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ⊆ wss 3936 ran crn 5556 ↾ cres 5557 “ cima 5558 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-rab 3147 df-v 3496 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4568 df-pr 4570 df-op 4574 df-br 5067 df-opab 5129 df-xp 5561 df-cnv 5563 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 |
This theorem is referenced by: funimass1 6436 funimass2 6437 fvimacnv 6823 fnfvimad 6996 f1imass 7022 ecinxp 8372 sbthlem1 8627 sbthlem2 8628 php3 8703 ordtypelem2 8983 tcrank 9313 limsupgord 14829 isercoll 15024 isacs1i 16928 gsumzf1o 19032 dprdres 19150 dprd2da 19164 dmdprdsplit2lem 19167 lmhmlsp 19821 f1lindf 20966 iscnp4 21871 cnpco 21875 cncls2i 21878 cnntri 21879 cnrest2 21894 cnpresti 21896 cnprest 21897 1stcfb 22053 xkococnlem 22267 qtopval2 22304 tgqtop 22320 qtoprest 22325 kqdisj 22340 regr1lem 22347 kqreglem1 22349 kqreglem2 22350 kqnrmlem1 22351 kqnrmlem2 22352 nrmhmph 22402 fbasrn 22492 elfm2 22556 fmfnfmlem1 22562 fmco 22569 flffbas 22603 cnpflf2 22608 cnextcn 22675 metcnp3 23150 metustto 23163 cfilucfil 23169 uniioombllem3 24186 dyadmbllem 24200 mbfconstlem 24228 i1fima2 24280 itg2gt0 24361 ellimc3 24477 limcflf 24479 limcresi 24483 limciun 24492 lhop 24613 ig1peu 24765 ig1pdvds 24770 psercnlem2 25012 dvloglem 25231 efopn 25241 fnpreimac 30416 txomap 31098 tpr2rico 31155 pthhashvtx 32374 cvmsss2 32521 cvmopnlem 32525 cvmliftmolem1 32528 cvmliftlem15 32545 cvmlift2lem9 32558 imadifss 34882 poimirlem1 34908 poimirlem2 34909 poimirlem3 34910 poimirlem15 34922 poimirlem30 34937 dvtan 34957 heibor1lem 35102 isnumbasabl 39726 isnumbasgrp 39727 dfacbasgrp 39728 trclimalb2 40091 frege81d 40112 imass2d 41556 limccog 41921 liminfgord 42055 |
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