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Mirrors > Home > MPE Home > Th. List > imasgrpf1 | Structured version Visualization version GIF version |
Description: The image of a group under an injection is a group. (Contributed by Mario Carneiro, 20-Aug-2015.) |
Ref | Expression |
---|---|
imasgrpf1.u | ⊢ 𝑈 = (𝐹 “s 𝑅) |
imasgrpf1.v | ⊢ 𝑉 = (Base‘𝑅) |
Ref | Expression |
---|---|
imasgrpf1 | ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → 𝑈 ∈ Grp) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | imasgrpf1.u | . . . 4 ⊢ 𝑈 = (𝐹 “s 𝑅) | |
2 | 1 | a1i 11 | . . 3 ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → 𝑈 = (𝐹 “s 𝑅)) |
3 | imasgrpf1.v | . . . 4 ⊢ 𝑉 = (Base‘𝑅) | |
4 | 3 | a1i 11 | . . 3 ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → 𝑉 = (Base‘𝑅)) |
5 | eqidd 2738 | . . 3 ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → (+g‘𝑅) = (+g‘𝑅)) | |
6 | f1f1orn 6764 | . . . . 5 ⊢ (𝐹:𝑉–1-1→𝐵 → 𝐹:𝑉–1-1-onto→ran 𝐹) | |
7 | 6 | adantr 481 | . . . 4 ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → 𝐹:𝑉–1-1-onto→ran 𝐹) |
8 | f1ofo 6760 | . . . 4 ⊢ (𝐹:𝑉–1-1-onto→ran 𝐹 → 𝐹:𝑉–onto→ran 𝐹) | |
9 | 7, 8 | syl 17 | . . 3 ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → 𝐹:𝑉–onto→ran 𝐹) |
10 | 7 | f1ocpbl 17306 | . . 3 ⊢ (((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) ∧ (𝑎 ∈ 𝑉 ∧ 𝑏 ∈ 𝑉) ∧ (𝑝 ∈ 𝑉 ∧ 𝑞 ∈ 𝑉)) → (((𝐹‘𝑎) = (𝐹‘𝑝) ∧ (𝐹‘𝑏) = (𝐹‘𝑞)) → (𝐹‘(𝑎(+g‘𝑅)𝑏)) = (𝐹‘(𝑝(+g‘𝑅)𝑞)))) |
11 | simpr 485 | . . 3 ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → 𝑅 ∈ Grp) | |
12 | eqid 2737 | . . 3 ⊢ (0g‘𝑅) = (0g‘𝑅) | |
13 | 2, 4, 5, 9, 10, 11, 12 | imasgrp 18760 | . 2 ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → (𝑈 ∈ Grp ∧ (𝐹‘(0g‘𝑅)) = (0g‘𝑈))) |
14 | 13 | simpld 495 | 1 ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → 𝑈 ∈ Grp) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1540 ∈ wcel 2105 ran crn 5608 –1-1→wf1 6462 –onto→wfo 6463 –1-1-onto→wf1o 6464 ‘cfv 6465 (class class class)co 7315 Basecbs 16982 +gcplusg 17032 0gc0g 17220 “s cimas 17285 Grpcgrp 18646 |
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 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2708 ax-rep 5224 ax-sep 5238 ax-nul 5245 ax-pow 5303 ax-pr 5367 ax-un 7628 ax-cnex 11000 ax-resscn 11001 ax-1cn 11002 ax-icn 11003 ax-addcl 11004 ax-addrcl 11005 ax-mulcl 11006 ax-mulrcl 11007 ax-mulcom 11008 ax-addass 11009 ax-mulass 11010 ax-distr 11011 ax-i2m1 11012 ax-1ne0 11013 ax-1rid 11014 ax-rnegex 11015 ax-rrecex 11016 ax-cnre 11017 ax-pre-lttri 11018 ax-pre-lttrn 11019 ax-pre-ltadd 11020 ax-pre-mulgt0 11021 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2815 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3350 df-reu 3351 df-rab 3405 df-v 3443 df-sbc 3727 df-csb 3843 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3916 df-nul 4268 df-if 4472 df-pw 4547 df-sn 4572 df-pr 4574 df-tp 4576 df-op 4578 df-uni 4851 df-iun 4939 df-br 5088 df-opab 5150 df-mpt 5171 df-tr 5205 df-id 5507 df-eprel 5513 df-po 5521 df-so 5522 df-fr 5562 df-we 5564 df-xp 5613 df-rel 5614 df-cnv 5615 df-co 5616 df-dm 5617 df-rn 5618 df-res 5619 df-ima 5620 df-pred 6224 df-ord 6291 df-on 6292 df-lim 6293 df-suc 6294 df-iota 6417 df-fun 6467 df-fn 6468 df-f 6469 df-f1 6470 df-fo 6471 df-f1o 6472 df-fv 6473 df-riota 7272 df-ov 7318 df-oprab 7319 df-mpo 7320 df-om 7758 df-1st 7876 df-2nd 7877 df-frecs 8144 df-wrecs 8175 df-recs 8249 df-rdg 8288 df-1o 8344 df-er 8546 df-en 8782 df-dom 8783 df-sdom 8784 df-fin 8785 df-sup 9271 df-inf 9272 df-pnf 11084 df-mnf 11085 df-xr 11086 df-ltxr 11087 df-le 11088 df-sub 11280 df-neg 11281 df-nn 12047 df-2 12109 df-3 12110 df-4 12111 df-5 12112 df-6 12113 df-7 12114 df-8 12115 df-9 12116 df-n0 12307 df-z 12393 df-dec 12511 df-uz 12656 df-fz 13313 df-struct 16918 df-slot 16953 df-ndx 16965 df-base 16983 df-plusg 17045 df-mulr 17046 df-sca 17048 df-vsca 17049 df-ip 17050 df-tset 17051 df-ple 17052 df-ds 17054 df-0g 17222 df-imas 17289 df-mgm 18396 df-sgrp 18445 df-mnd 18456 df-grp 18649 df-minusg 18650 |
This theorem is referenced by: xpsgrp 18763 |
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