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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 2762 | . . 3 ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → (+g‘𝑅) = (+g‘𝑅)) | |
| 6 | f1f1orn 6836 | . . . . 5 ⊢ (𝐹:𝑉–1-1→𝐵 → 𝐹:𝑉–1-1-onto→ran 𝐹) | |
| 7 | 6 | adantr 486 | . . . 4 ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → 𝐹:𝑉–1-1-onto→ran 𝐹) |
| 8 | f1ofo 6832 | . . . 4 ⊢ (𝐹:𝑉–1-1-onto→ran 𝐹 → 𝐹:𝑉–onto→ran 𝐹) | |
| 9 | 7, 8 | syl 18 | . . 3 ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → 𝐹:𝑉–onto→ran 𝐹) |
| 10 | 7 | f1ocpbl 17697 | . . 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 490 | . . 3 ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → 𝑅 ∈ Grp) | |
| 12 | eqid 2761 | . . 3 ⊢ (0g‘𝑅) = (0g‘𝑅) | |
| 13 | 2, 4, 5, 9, 10, 11, 12 | imasgrp 19266 | . 2 ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → (𝑈 ∈ Grp ∧ (𝐹‘(0g‘𝑅)) = (0g‘𝑈))) |
| 14 | 13 | simpld 500 | 1 ⊢ ((𝐹:𝑉–1-1→𝐵 ∧ 𝑅 ∈ Grp) → 𝑈 ∈ Grp) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ran crn 5652 –1-1→wf1 6535 –onto→wfo 6536 –1-1-onto→wf1o 6537 ‘cfv 6538 (class class class)co 7420 Basecbs 17387 +gcplusg 17428 0gc0g 17610 “s cimas 17676 Grpcgrp 19144 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7751 ax-cnex 11256 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-1o 8476 df-er 8717 df-en 8974 df-dom 8975 df-sdom 8976 df-fin 8977 df-sup 9434 df-inf 9435 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 df-nn 12336 df-2 12405 df-3 12406 df-4 12407 df-5 12408 df-6 12409 df-7 12410 df-8 12411 df-9 12412 df-n0 12607 df-z 12694 df-dec 12815 df-uz 12966 df-fz 13640 df-struct 17325 df-slot 17360 df-ndx 17372 df-base 17388 df-plusg 17441 df-mulr 17442 df-sca 17444 df-vsca 17445 df-ip 17446 df-tset 17447 df-ple 17448 df-ds 17450 df-0g 17612 df-imas 17680 df-mgm 18816 df-sgrp 18908 df-mnd 18924 df-grp 19147 df-minusg 19148 |
| This theorem is used by: xpsgrp 19269 |
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