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Theorem phoeqi 29219

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 3166	. 2 ⊢ (∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑌 (𝑥𝑃(𝑆‘𝑦)) = (𝑥𝑃(𝑇‘𝑦)) ↔ ∀𝑦 ∈ 𝑌 ∀𝑥 ∈ 𝑋 (𝑥𝑃(𝑆‘𝑦)) = (𝑥𝑃(𝑇‘𝑦)))
2		ffvelrn 6959	. . . . . 6 ⊢ ((𝑆:𝑌⟶𝑋 ∧ 𝑦 ∈ 𝑌) → (𝑆‘𝑦) ∈ 𝑋)
3		ffvelrn 6959	. . . . . 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 29218	. . . . . 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 676	. . . 4 ⊢ (((𝑆:𝑌⟶𝑋 ∧ 𝑇:𝑌⟶𝑋) ∧ 𝑦 ∈ 𝑌) → (∀𝑥 ∈ 𝑋 (𝑥𝑃(𝑆‘𝑦)) = (𝑥𝑃(𝑇‘𝑦)) ↔ (𝑆‘𝑦) = (𝑇‘𝑦)))
10	9	ralbidva 3111	. . 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 6600	. . . 4 ⊢ (𝑆:𝑌⟶𝑋 → 𝑆 Fn 𝑌)
12		ffn 6600	. . . 4 ⊢ (𝑇:𝑌⟶𝑋 → 𝑇 Fn 𝑌)
13		eqfnfv 6909	. . . 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 281	. 2 ⊢ ((𝑆:𝑌⟶𝑋 ∧ 𝑇:𝑌⟶𝑋) → (∀𝑦 ∈ 𝑌 ∀𝑥 ∈ 𝑋 (𝑥𝑃(𝑆‘𝑦)) = (𝑥𝑃(𝑇‘𝑦)) ↔ 𝑆 = 𝑇))
16	1, 15	syl5bb 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 205 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ∀wral 3064 Fn wfn 6428 ⟶wf 6429 ‘cfv 6433 (class class class)co 7275 BaseSetcba 28948 ·_𝑖OLDcdip 29062 CPreHil_OLDccphlo 29174

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-inf2 9399 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 ax-addf 10950 ax-mulf 10951

This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-iin 4927 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-se 5545 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-isom 6442 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-of 7533 df-om 7713 df-1st 7831 df-2nd 7832 df-supp 7978 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-2o 8298 df-er 8498 df-map 8617 df-ixp 8686 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-fsupp 9129 df-fi 9170 df-sup 9201 df-inf 9202 df-oi 9269 df-card 9697 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-4 12038 df-5 12039 df-6 12040 df-7 12041 df-8 12042 df-9 12043 df-n0 12234 df-z 12320 df-dec 12438 df-uz 12583 df-q 12689 df-rp 12731 df-xneg 12848 df-xadd 12849 df-xmul 12850 df-ioo 13083 df-icc 13086 df-fz 13240 df-fzo 13383 df-seq 13722 df-exp 13783 df-hash 14045 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-clim 15197 df-sum 15398 df-struct 16848 df-sets 16865 df-slot 16883 df-ndx 16895 df-base 16913 df-ress 16942 df-plusg 16975 df-mulr 16976 df-starv 16977 df-sca 16978 df-vsca 16979 df-ip 16980 df-tset 16981 df-ple 16982 df-ds 16984 df-unif 16985 df-hom 16986 df-cco 16987 df-rest 17133 df-topn 17134 df-0g 17152 df-gsum 17153 df-topgen 17154 df-pt 17155 df-prds 17158 df-xrs 17213 df-qtop 17218 df-imas 17219 df-xps 17221 df-mre 17295 df-mrc 17296 df-acs 17298 df-mgm 18326 df-sgrp 18375 df-mnd 18386 df-submnd 18431 df-mulg 18701 df-cntz 18923 df-cmn 19388 df-psmet 20589 df-xmet 20590 df-met 20591 df-bl 20592 df-mopn 20593 df-cnfld 20598 df-top 22043 df-topon 22060 df-topsp 22082 df-bases 22096 df-cld 22170 df-ntr 22171 df-cls 22172 df-cn 22378 df-cnp 22379 df-t1 22465 df-haus 22466 df-tx 22713 df-hmeo 22906 df-xms 23473 df-ms 23474 df-tms 23475 df-grpo 28855 df-gid 28856 df-ginv 28857 df-gdiv 28858 df-ablo 28907 df-vc 28921 df-nv 28954 df-va 28957 df-ba 28958 df-sm 28959 df-0v 28960 df-vs 28961 df-nmcv 28962 df-ims 28963 df-dip 29063 df-ph 29175

This theorem is referenced by: ajmoi 29220

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