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Theorem phoeqi 30836

Description: A condition implying that two operators are equal. (Contributed by NM, 25-Jan-2008.) (New usage is discouraged.)

**Hypotheses**
Ref	Expression
ip2eqi.1	⊢ 𝑋 = (BaseSet‘𝑈)
ip2eqi.7	⊢ 𝑃 = (·_𝑖OLD‘𝑈)
ip2eqi.u	⊢ 𝑈 ∈ CPreHil_OLD

**Assertion**
Ref	Expression
phoeqi	⊢ ((𝑆:𝑌⟶𝑋 ∧ 𝑇:𝑌⟶𝑋) → (∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑌 (𝑥𝑃(𝑆‘𝑦)) = (𝑥𝑃(𝑇‘𝑦)) ↔ 𝑆 = 𝑇))

Distinct variable groups: 𝑥,𝑃 𝑥,𝑦,𝑆 𝑥,𝑇,𝑦 𝑥,𝑈 𝑥,𝑋,𝑦 𝑥,𝑌,𝑦 Allowed substitution hints: 𝑃(𝑦) 𝑈(𝑦)

**Proof of Theorem phoeqi**
Step	Hyp	Ref	Expression
1		ralcom 3263	. 2 ⊢ (∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑌 (𝑥𝑃(𝑆‘𝑦)) = (𝑥𝑃(𝑇‘𝑦)) ↔ ∀𝑦 ∈ 𝑌 ∀𝑥 ∈ 𝑋 (𝑥𝑃(𝑆‘𝑦)) = (𝑥𝑃(𝑇‘𝑦)))
2		ffvelcdm 7035	. . . . . 6 ⊢ ((𝑆:𝑌⟶𝑋 ∧ 𝑦 ∈ 𝑌) → (𝑆‘𝑦) ∈ 𝑋)
3		ffvelcdm 7035	. . . . . 6 ⊢ ((𝑇:𝑌⟶𝑋 ∧ 𝑦 ∈ 𝑌) → (𝑇‘𝑦) ∈ 𝑋)
4		ip2eqi.1	. . . . . . 7 ⊢ 𝑋 = (BaseSet‘𝑈)
5		ip2eqi.7	. . . . . . 7 ⊢ 𝑃 = (·_𝑖OLD‘𝑈)
6		ip2eqi.u	. . . . . . 7 ⊢ 𝑈 ∈ CPreHil_OLD
7	4, 5, 6	ip2eqi 30835	. . . . . 6 ⊢ (((𝑆‘𝑦) ∈ 𝑋 ∧ (𝑇‘𝑦) ∈ 𝑋) → (∀𝑥 ∈ 𝑋 (𝑥𝑃(𝑆‘𝑦)) = (𝑥𝑃(𝑇‘𝑦)) ↔ (𝑆‘𝑦) = (𝑇‘𝑦)))
8	2, 3, 7	syl2an 596	. . . . 5 ⊢ (((𝑆:𝑌⟶𝑋 ∧ 𝑦 ∈ 𝑌) ∧ (𝑇:𝑌⟶𝑋 ∧ 𝑦 ∈ 𝑌)) → (∀𝑥 ∈ 𝑋 (𝑥𝑃(𝑆‘𝑦)) = (𝑥𝑃(𝑇‘𝑦)) ↔ (𝑆‘𝑦) = (𝑇‘𝑦)))
9	8	anandirs 679	. . . 4 ⊢ (((𝑆:𝑌⟶𝑋 ∧ 𝑇:𝑌⟶𝑋) ∧ 𝑦 ∈ 𝑌) → (∀𝑥 ∈ 𝑋 (𝑥𝑃(𝑆‘𝑦)) = (𝑥𝑃(𝑇‘𝑦)) ↔ (𝑆‘𝑦) = (𝑇‘𝑦)))
10	9	ralbidva 3154	. . 3 ⊢ ((𝑆:𝑌⟶𝑋 ∧ 𝑇:𝑌⟶𝑋) → (∀𝑦 ∈ 𝑌 ∀𝑥 ∈ 𝑋 (𝑥𝑃(𝑆‘𝑦)) = (𝑥𝑃(𝑇‘𝑦)) ↔ ∀𝑦 ∈ 𝑌 (𝑆‘𝑦) = (𝑇‘𝑦)))
11		ffn 6670	. . . 4 ⊢ (𝑆:𝑌⟶𝑋 → 𝑆 Fn 𝑌)
12		ffn 6670	. . . 4 ⊢ (𝑇:𝑌⟶𝑋 → 𝑇 Fn 𝑌)
13		eqfnfv 6985	. . . 4 ⊢ ((𝑆 Fn 𝑌 ∧ 𝑇 Fn 𝑌) → (𝑆 = 𝑇 ↔ ∀𝑦 ∈ 𝑌 (𝑆‘𝑦) = (𝑇‘𝑦)))
14	11, 12, 13	syl2an 596	. . 3 ⊢ ((𝑆:𝑌⟶𝑋 ∧ 𝑇:𝑌⟶𝑋) → (𝑆 = 𝑇 ↔ ∀𝑦 ∈ 𝑌 (𝑆‘𝑦) = (𝑇‘𝑦)))
15	10, 14	bitr4d 282	. 2 ⊢ ((𝑆:𝑌⟶𝑋 ∧ 𝑇:𝑌⟶𝑋) → (∀𝑦 ∈ 𝑌 ∀𝑥 ∈ 𝑋 (𝑥𝑃(𝑆‘𝑦)) = (𝑥𝑃(𝑇‘𝑦)) ↔ 𝑆 = 𝑇))
16	1, 15	bitrid 283	1 ⊢ ((𝑆:𝑌⟶𝑋 ∧ 𝑇:𝑌⟶𝑋) → (∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑌 (𝑥𝑃(𝑆‘𝑦)) = (𝑥𝑃(𝑇‘𝑦)) ↔ 𝑆 = 𝑇))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1540 ∈ wcel 2109 ∀wral 3044 Fn wfn 6494 ⟶wf 6495 ‘cfv 6499 (class class class)co 7369 BaseSetcba 30565 ·_𝑖OLDcdip 30679 CPreHil_OLDccphlo 30791

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5229 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 ax-inf2 9570 ax-cnex 11100 ax-resscn 11101 ax-1cn 11102 ax-icn 11103 ax-addcl 11104 ax-addrcl 11105 ax-mulcl 11106 ax-mulrcl 11107 ax-mulcom 11108 ax-addass 11109 ax-mulass 11110 ax-distr 11111 ax-i2m1 11112 ax-1ne0 11113 ax-1rid 11114 ax-rnegex 11115 ax-rrecex 11116 ax-cnre 11117 ax-pre-lttri 11118 ax-pre-lttrn 11119 ax-pre-ltadd 11120 ax-pre-mulgt0 11121 ax-pre-sup 11122 ax-addf 11123 ax-mulf 11124

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3351 df-reu 3352 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-pss 3931 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-tp 4590 df-op 4592 df-uni 4868 df-int 4907 df-iun 4953 df-iin 4954 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-se 5585 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6262 df-ord 6323 df-on 6324 df-lim 6325 df-suc 6326 df-iota 6452 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-isom 6508 df-riota 7326 df-ov 7372 df-oprab 7373 df-mpo 7374 df-of 7633 df-om 7823 df-1st 7947 df-2nd 7948 df-supp 8117 df-frecs 8237 df-wrecs 8268 df-recs 8317 df-rdg 8355 df-1o 8411 df-2o 8412 df-er 8648 df-map 8778 df-ixp 8848 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-fsupp 9289 df-fi 9338 df-sup 9369 df-inf 9370 df-oi 9439 df-card 9868 df-pnf 11186 df-mnf 11187 df-xr 11188 df-ltxr 11189 df-le 11190 df-sub 11383 df-neg 11384 df-div 11812 df-nn 12163 df-2 12225 df-3 12226 df-4 12227 df-5 12228 df-6 12229 df-7 12230 df-8 12231 df-9 12232 df-n0 12419 df-z 12506 df-dec 12626 df-uz 12770 df-q 12884 df-rp 12928 df-xneg 13048 df-xadd 13049 df-xmul 13050 df-ioo 13286 df-icc 13289 df-fz 13445 df-fzo 13592 df-seq 13943 df-exp 14003 df-hash 14272 df-cj 15041 df-re 15042 df-im 15043 df-sqrt 15177 df-abs 15178 df-clim 15430 df-sum 15629 df-struct 17093 df-sets 17110 df-slot 17128 df-ndx 17140 df-base 17156 df-ress 17177 df-plusg 17209 df-mulr 17210 df-starv 17211 df-sca 17212 df-vsca 17213 df-ip 17214 df-tset 17215 df-ple 17216 df-ds 17218 df-unif 17219 df-hom 17220 df-cco 17221 df-rest 17361 df-topn 17362 df-0g 17380 df-gsum 17381 df-topgen 17382 df-pt 17383 df-prds 17386 df-xrs 17441 df-qtop 17446 df-imas 17447 df-xps 17449 df-mre 17523 df-mrc 17524 df-acs 17526 df-mgm 18549 df-sgrp 18628 df-mnd 18644 df-submnd 18693 df-mulg 18982 df-cntz 19231 df-cmn 19696 df-psmet 21288 df-xmet 21289 df-met 21290 df-bl 21291 df-mopn 21292 df-cnfld 21297 df-top 22814 df-topon 22831 df-topsp 22853 df-bases 22866 df-cld 22939 df-ntr 22940 df-cls 22941 df-cn 23147 df-cnp 23148 df-t1 23234 df-haus 23235 df-tx 23482 df-hmeo 23675 df-xms 24241 df-ms 24242 df-tms 24243 df-grpo 30472 df-gid 30473 df-ginv 30474 df-gdiv 30475 df-ablo 30524 df-vc 30538 df-nv 30571 df-va 30574 df-ba 30575 df-sm 30576 df-0v 30577 df-vs 30578 df-nmcv 30579 df-ims 30580 df-dip 30680 df-ph 30792

This theorem is referenced by: ajmoi 30837

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