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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 5425 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 ↾ 𝐴) ⊆ (𝐶 ↾ 𝐵)) | |
2 | rnss 5354 | . . 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 5127 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
5 | df-ima 5127 | . 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵) | |
6 | 3, 4, 5 | 3sstr4g 3646 | 1 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 “ 𝐴) ⊆ (𝐶 “ 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ⊆ wss 3574 ran crn 5115 ↾ cres 5116 “ cima 5117 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-rab 2921 df-v 3202 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-op 4184 df-br 4654 df-opab 4713 df-xp 5120 df-cnv 5122 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 |
This theorem is referenced by: funimass1 5971 funimass2 5972 fvimacnv 6332 f1imass 6521 ecinxp 7822 sbthlem1 8070 sbthlem2 8071 php3 8146 ordtypelem2 8424 tcrank 8747 limsupgord 14203 isercoll 14398 isacs1i 16318 gsumzf1o 18313 dprdres 18427 dprd2da 18441 dmdprdsplit2lem 18444 lmhmlsp 19049 f1lindf 20161 iscnp4 21067 cnpco 21071 cncls2i 21074 cnntri 21075 cnrest2 21090 cnpresti 21092 cnprest 21093 1stcfb 21248 xkococnlem 21462 qtopval2 21499 tgqtop 21515 qtoprest 21520 kqdisj 21535 regr1lem 21542 kqreglem1 21544 kqreglem2 21545 kqnrmlem1 21546 kqnrmlem2 21547 nrmhmph 21597 fbasrn 21688 elfm2 21752 fmfnfmlem1 21758 fmco 21765 flffbas 21799 cnpflf2 21804 cnextcn 21871 metcnp3 22345 metustto 22358 cfilucfil 22364 uniioombllem3 23353 dyadmbllem 23367 mbfconstlem 23396 i1fima2 23446 itg2gt0 23527 ellimc3 23643 limcflf 23645 limcresi 23649 limciun 23658 lhop 23779 ig1peu 23931 ig1pdvds 23936 psercnlem2 24178 dvloglem 24394 efopn 24404 txomap 29901 tpr2rico 29958 cvmsss2 31256 cvmopnlem 31260 cvmliftmolem1 31263 cvmliftlem15 31280 cvmlift2lem9 31293 imadifss 33384 poimirlem1 33410 poimirlem2 33411 poimirlem3 33412 poimirlem15 33424 poimirlem30 33439 dvtan 33460 heibor1lem 33608 isnumbasabl 37676 isnumbasgrp 37677 dfacbasgrp 37678 trclimalb2 38018 frege81d 38039 fnfvimad 39459 fnfvima2 39478 imass2d 39480 limccog 39852 liminfgord 39986 |
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