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Mirrors > Home > MPE Home > Th. List > oppcepi | Structured version Visualization version GIF version |
Description: An epimorphism in the opposite category is a monomorphism. (Contributed by Mario Carneiro, 3-Jan-2017.) |
Ref | Expression |
---|---|
oppcmon.o | ⊢ 𝑂 = (oppCat‘𝐶) |
oppcmon.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
oppcepi.e | ⊢ 𝐸 = (Epi‘𝑂) |
oppcepi.m | ⊢ 𝑀 = (Mono‘𝐶) |
Ref | Expression |
---|---|
oppcepi | ⊢ (𝜑 → (𝑋𝐸𝑌) = (𝑌𝑀𝑋)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oppcepi.m | . . . 4 ⊢ 𝑀 = (Mono‘𝐶) | |
2 | oppcmon.o | . . . . . . 7 ⊢ 𝑂 = (oppCat‘𝐶) | |
3 | 2 | 2oppchomf 17352 | . . . . . 6 ⊢ (Homf ‘𝐶) = (Homf ‘(oppCat‘𝑂)) |
4 | 3 | a1i 11 | . . . . 5 ⊢ (𝜑 → (Homf ‘𝐶) = (Homf ‘(oppCat‘𝑂))) |
5 | 2 | 2oppccomf 17353 | . . . . . 6 ⊢ (compf‘𝐶) = (compf‘(oppCat‘𝑂)) |
6 | 5 | a1i 11 | . . . . 5 ⊢ (𝜑 → (compf‘𝐶) = (compf‘(oppCat‘𝑂))) |
7 | oppcmon.c | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
8 | 2 | oppccat 17350 | . . . . . . 7 ⊢ (𝐶 ∈ Cat → 𝑂 ∈ Cat) |
9 | 7, 8 | syl 17 | . . . . . 6 ⊢ (𝜑 → 𝑂 ∈ Cat) |
10 | eqid 2738 | . . . . . . 7 ⊢ (oppCat‘𝑂) = (oppCat‘𝑂) | |
11 | 10 | oppccat 17350 | . . . . . 6 ⊢ (𝑂 ∈ Cat → (oppCat‘𝑂) ∈ Cat) |
12 | 9, 11 | syl 17 | . . . . 5 ⊢ (𝜑 → (oppCat‘𝑂) ∈ Cat) |
13 | 4, 6, 7, 12 | monpropd 17366 | . . . 4 ⊢ (𝜑 → (Mono‘𝐶) = (Mono‘(oppCat‘𝑂))) |
14 | 1, 13 | eqtrid 2790 | . . 3 ⊢ (𝜑 → 𝑀 = (Mono‘(oppCat‘𝑂))) |
15 | 14 | oveqd 7272 | . 2 ⊢ (𝜑 → (𝑌𝑀𝑋) = (𝑌(Mono‘(oppCat‘𝑂))𝑋)) |
16 | eqid 2738 | . . 3 ⊢ (Mono‘(oppCat‘𝑂)) = (Mono‘(oppCat‘𝑂)) | |
17 | oppcepi.e | . . 3 ⊢ 𝐸 = (Epi‘𝑂) | |
18 | 10, 9, 16, 17 | oppcmon 17367 | . 2 ⊢ (𝜑 → (𝑌(Mono‘(oppCat‘𝑂))𝑋) = (𝑋𝐸𝑌)) |
19 | 15, 18 | eqtr2d 2779 | 1 ⊢ (𝜑 → (𝑋𝐸𝑌) = (𝑌𝑀𝑋)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1539 ∈ wcel 2108 ‘cfv 6418 (class class class)co 7255 Catccat 17290 Homf chomf 17292 compfccomf 17293 oppCatcoppc 17337 Monocmon 17357 Epicepi 17358 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-tpos 8013 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-nn 11904 df-2 11966 df-3 11967 df-4 11968 df-5 11969 df-6 11970 df-7 11971 df-8 11972 df-9 11973 df-n0 12164 df-z 12250 df-dec 12367 df-sets 16793 df-slot 16811 df-ndx 16823 df-base 16841 df-hom 16912 df-cco 16913 df-cat 17294 df-cid 17295 df-homf 17296 df-comf 17297 df-oppc 17338 df-mon 17359 df-epi 17360 |
This theorem is referenced by: (None) |
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