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Mirrors > Home > MPE Home > Th. List > 1stf1 | Structured version Visualization version GIF version |
Description: Value of the first projection on an object. (Contributed by Mario Carneiro, 11-Jan-2017.) |
Ref | Expression |
---|---|
1stfval.t | ⊢ 𝑇 = (𝐶 ×c 𝐷) |
1stfval.b | ⊢ 𝐵 = (Base‘𝑇) |
1stfval.h | ⊢ 𝐻 = (Hom ‘𝑇) |
1stfval.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
1stfval.d | ⊢ (𝜑 → 𝐷 ∈ Cat) |
1stfval.p | ⊢ 𝑃 = (𝐶 1stF 𝐷) |
1stf1.p | ⊢ (𝜑 → 𝑅 ∈ 𝐵) |
Ref | Expression |
---|---|
1stf1 | ⊢ (𝜑 → ((1st ‘𝑃)‘𝑅) = (1st ‘𝑅)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1stfval.t | . . . . 5 ⊢ 𝑇 = (𝐶 ×c 𝐷) | |
2 | 1stfval.b | . . . . 5 ⊢ 𝐵 = (Base‘𝑇) | |
3 | 1stfval.h | . . . . 5 ⊢ 𝐻 = (Hom ‘𝑇) | |
4 | 1stfval.c | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
5 | 1stfval.d | . . . . 5 ⊢ (𝜑 → 𝐷 ∈ Cat) | |
6 | 1stfval.p | . . . . 5 ⊢ 𝑃 = (𝐶 1stF 𝐷) | |
7 | 1, 2, 3, 4, 5, 6 | 1stfval 17431 | . . . 4 ⊢ (𝜑 → 𝑃 = 〈(1st ↾ 𝐵), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (1st ↾ (𝑥𝐻𝑦)))〉) |
8 | fo1st 7700 | . . . . . . 7 ⊢ 1st :V–onto→V | |
9 | fofun 6585 | . . . . . . 7 ⊢ (1st :V–onto→V → Fun 1st ) | |
10 | 8, 9 | ax-mp 5 | . . . . . 6 ⊢ Fun 1st |
11 | 2 | fvexi 6678 | . . . . . 6 ⊢ 𝐵 ∈ V |
12 | resfunexg 6970 | . . . . . 6 ⊢ ((Fun 1st ∧ 𝐵 ∈ V) → (1st ↾ 𝐵) ∈ V) | |
13 | 10, 11, 12 | mp2an 688 | . . . . 5 ⊢ (1st ↾ 𝐵) ∈ V |
14 | 11, 11 | mpoex 7768 | . . . . 5 ⊢ (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (1st ↾ (𝑥𝐻𝑦))) ∈ V |
15 | 13, 14 | op1std 7690 | . . . 4 ⊢ (𝑃 = 〈(1st ↾ 𝐵), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (1st ↾ (𝑥𝐻𝑦)))〉 → (1st ‘𝑃) = (1st ↾ 𝐵)) |
16 | 7, 15 | syl 17 | . . 3 ⊢ (𝜑 → (1st ‘𝑃) = (1st ↾ 𝐵)) |
17 | 16 | fveq1d 6666 | . 2 ⊢ (𝜑 → ((1st ‘𝑃)‘𝑅) = ((1st ↾ 𝐵)‘𝑅)) |
18 | 1stf1.p | . . 3 ⊢ (𝜑 → 𝑅 ∈ 𝐵) | |
19 | 18 | fvresd 6684 | . 2 ⊢ (𝜑 → ((1st ↾ 𝐵)‘𝑅) = (1st ‘𝑅)) |
20 | 17, 19 | eqtrd 2856 | 1 ⊢ (𝜑 → ((1st ‘𝑃)‘𝑅) = (1st ‘𝑅)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1528 ∈ wcel 2105 Vcvv 3495 〈cop 4565 ↾ cres 5551 Fun wfun 6343 –onto→wfo 6347 ‘cfv 6349 (class class class)co 7145 ∈ cmpo 7147 1st c1st 7678 Basecbs 16473 Hom chom 16566 Catccat 16925 ×c cxpc 17408 1stF c1stf 17409 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2793 ax-rep 5182 ax-sep 5195 ax-nul 5202 ax-pow 5258 ax-pr 5321 ax-un 7450 ax-cnex 10582 ax-resscn 10583 ax-1cn 10584 ax-icn 10585 ax-addcl 10586 ax-addrcl 10587 ax-mulcl 10588 ax-mulrcl 10589 ax-mulcom 10590 ax-addass 10591 ax-mulass 10592 ax-distr 10593 ax-i2m1 10594 ax-1ne0 10595 ax-1rid 10596 ax-rnegex 10597 ax-rrecex 10598 ax-cnre 10599 ax-pre-lttri 10600 ax-pre-lttrn 10601 ax-pre-ltadd 10602 ax-pre-mulgt0 10603 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3or 1080 df-3an 1081 df-tru 1531 df-fal 1541 df-ex 1772 df-nf 1776 df-sb 2061 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rab 3147 df-v 3497 df-sbc 3772 df-csb 3883 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-pss 3953 df-nul 4291 df-if 4466 df-pw 4539 df-sn 4560 df-pr 4562 df-tp 4564 df-op 4566 df-uni 4833 df-iun 4914 df-br 5059 df-opab 5121 df-mpt 5139 df-tr 5165 df-id 5454 df-eprel 5459 df-po 5468 df-so 5469 df-fr 5508 df-we 5510 df-xp 5555 df-rel 5556 df-cnv 5557 df-co 5558 df-dm 5559 df-rn 5560 df-res 5561 df-ima 5562 df-pred 6142 df-ord 6188 df-on 6189 df-lim 6190 df-suc 6191 df-iota 6308 df-fun 6351 df-fn 6352 df-f 6353 df-f1 6354 df-fo 6355 df-f1o 6356 df-fv 6357 df-riota 7103 df-ov 7148 df-oprab 7149 df-mpo 7150 df-om 7569 df-1st 7680 df-2nd 7681 df-wrecs 7938 df-recs 7999 df-rdg 8037 df-er 8279 df-en 8499 df-dom 8500 df-sdom 8501 df-pnf 10666 df-mnf 10667 df-xr 10668 df-ltxr 10669 df-le 10670 df-sub 10861 df-neg 10862 df-nn 11628 df-2 11689 df-3 11690 df-4 11691 df-5 11692 df-6 11693 df-7 11694 df-8 11695 df-9 11696 df-n0 11887 df-z 11971 df-dec 12088 df-ndx 16476 df-slot 16477 df-base 16479 df-hom 16579 df-cco 16580 df-xpc 17412 df-1stf 17413 |
This theorem is referenced by: prf1st 17444 1st2ndprf 17446 uncf1 17476 uncf2 17477 diag11 17483 yonedalem21 17513 yonedalem22 17518 |
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