fsum2cn - Metamath Proof Explorer

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Theorem fsum2cn 24740

Description: Version of fsumcn 24739 for two-argument mappings. (Contributed by Mario Carneiro, 6-May-2014.)

**Hypotheses**
Ref	Expression
fsumcn.3	⊢ 𝐾 = (TopOpen‘ℂ_fld)
fsumcn.4	⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋))
fsumcn.5	⊢ (𝜑 → 𝐴 ∈ Fin)
fsum2cn.7	⊢ (𝜑 → 𝐿 ∈ (TopOn‘𝑌))
fsum2cn.8	⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵) ∈ ((𝐽 ×_t 𝐿) Cn 𝐾))

**Assertion**
Ref	Expression
fsum2cn	⊢ (𝜑 → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ Σ𝑘 ∈ 𝐴 𝐵) ∈ ((𝐽 ×_t 𝐿) Cn 𝐾))

Distinct variable groups: 𝑥,𝑘,𝑦,𝐴 𝑘,𝐽,𝑥,𝑦 𝑘,𝐿 𝜑,𝑘,𝑥,𝑦 𝑘,𝐾,𝑥,𝑦 𝑘,𝑋,𝑥,𝑦 𝑘,𝑌,𝑥,𝑦 Allowed substitution hints: 𝐵(𝑥,𝑦,𝑘) 𝐿(𝑥,𝑦)

Proof of Theorem fsum2cn Dummy variables 𝑢 𝑣 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		nfcv 2897	. . . 4 ⊢ Ⅎ𝑢Σ𝑘 ∈ 𝐴 𝐵
2		nfcv 2897	. . . 4 ⊢ Ⅎ𝑣Σ𝑘 ∈ 𝐴 𝐵
3		nfcv 2897	. . . . 5 ⊢ Ⅎ𝑥𝐴
4		nfcv 2897	. . . . . 6 ⊢ Ⅎ𝑥𝑣
5		nfcsb1v 3913	. . . . . 6 ⊢ Ⅎ𝑥⦋𝑢 / 𝑥⦌𝐵
6	4, 5	nfcsbw 3915	. . . . 5 ⊢ Ⅎ𝑥⦋𝑣 / 𝑦⦌⦋𝑢 / 𝑥⦌𝐵
7	3, 6	nfsum 15641	. . . 4 ⊢ Ⅎ𝑥Σ𝑘 ∈ 𝐴 ⦋𝑣 / 𝑦⦌⦋𝑢 / 𝑥⦌𝐵
8		nfcv 2897	. . . . 5 ⊢ Ⅎ𝑦𝐴
9		nfcsb1v 3913	. . . . 5 ⊢ Ⅎ𝑦⦋𝑣 / 𝑦⦌⦋𝑢 / 𝑥⦌𝐵
10	8, 9	nfsum 15641	. . . 4 ⊢ Ⅎ𝑦Σ𝑘 ∈ 𝐴 ⦋𝑣 / 𝑦⦌⦋𝑢 / 𝑥⦌𝐵
11		csbeq1a 3902	. . . . . 6 ⊢ (𝑥 = 𝑢 → 𝐵 = ⦋𝑢 / 𝑥⦌𝐵)
12		csbeq1a 3902	. . . . . 6 ⊢ (𝑦 = 𝑣 → ⦋𝑢 / 𝑥⦌𝐵 = ⦋𝑣 / 𝑦⦌⦋𝑢 / 𝑥⦌𝐵)
13	11, 12	sylan9eq 2786	. . . . 5 ⊢ ((𝑥 = 𝑢 ∧ 𝑦 = 𝑣) → 𝐵 = ⦋𝑣 / 𝑦⦌⦋𝑢 / 𝑥⦌𝐵)
14	13	sumeq2sdv 15654	. . . 4 ⊢ ((𝑥 = 𝑢 ∧ 𝑦 = 𝑣) → Σ𝑘 ∈ 𝐴 𝐵 = Σ𝑘 ∈ 𝐴 ⦋𝑣 / 𝑦⦌⦋𝑢 / 𝑥⦌𝐵)
15	1, 2, 7, 10, 14	cbvmpo 7498	. . 3 ⊢ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ Σ𝑘 ∈ 𝐴 𝐵) = (𝑢 ∈ 𝑋, 𝑣 ∈ 𝑌 ↦ Σ𝑘 ∈ 𝐴 ⦋𝑣 / 𝑦⦌⦋𝑢 / 𝑥⦌𝐵)
16		vex 3472	. . . . . . . 8 ⊢ 𝑢 ∈ V
17		vex 3472	. . . . . . . 8 ⊢ 𝑣 ∈ V
18	16, 17	op2ndd 7982	. . . . . . 7 ⊢ (𝑧 = ⟨𝑢, 𝑣⟩ → (2^nd ‘𝑧) = 𝑣)
19	18	csbeq1d 3892	. . . . . 6 ⊢ (𝑧 = ⟨𝑢, 𝑣⟩ → ⦋(2^nd ‘𝑧) / 𝑦⦌⦋(1^st ‘𝑧) / 𝑥⦌𝐵 = ⦋𝑣 / 𝑦⦌⦋(1^st ‘𝑧) / 𝑥⦌𝐵)
20	16, 17	op1std 7981	. . . . . . . 8 ⊢ (𝑧 = ⟨𝑢, 𝑣⟩ → (1^st ‘𝑧) = 𝑢)
21	20	csbeq1d 3892	. . . . . . 7 ⊢ (𝑧 = ⟨𝑢, 𝑣⟩ → ⦋(1^st ‘𝑧) / 𝑥⦌𝐵 = ⦋𝑢 / 𝑥⦌𝐵)
22	21	csbeq2dv 3895	. . . . . 6 ⊢ (𝑧 = ⟨𝑢, 𝑣⟩ → ⦋𝑣 / 𝑦⦌⦋(1^st ‘𝑧) / 𝑥⦌𝐵 = ⦋𝑣 / 𝑦⦌⦋𝑢 / 𝑥⦌𝐵)
23	19, 22	eqtrd 2766	. . . . 5 ⊢ (𝑧 = ⟨𝑢, 𝑣⟩ → ⦋(2^nd ‘𝑧) / 𝑦⦌⦋(1^st ‘𝑧) / 𝑥⦌𝐵 = ⦋𝑣 / 𝑦⦌⦋𝑢 / 𝑥⦌𝐵)
24	23	sumeq2sdv 15654	. . . 4 ⊢ (𝑧 = ⟨𝑢, 𝑣⟩ → Σ𝑘 ∈ 𝐴 ⦋(2^nd ‘𝑧) / 𝑦⦌⦋(1^st ‘𝑧) / 𝑥⦌𝐵 = Σ𝑘 ∈ 𝐴 ⦋𝑣 / 𝑦⦌⦋𝑢 / 𝑥⦌𝐵)
25	24	mpompt 7517	. . 3 ⊢ (𝑧 ∈ (𝑋 × 𝑌) ↦ Σ𝑘 ∈ 𝐴 ⦋(2^nd ‘𝑧) / 𝑦⦌⦋(1^st ‘𝑧) / 𝑥⦌𝐵) = (𝑢 ∈ 𝑋, 𝑣 ∈ 𝑌 ↦ Σ𝑘 ∈ 𝐴 ⦋𝑣 / 𝑦⦌⦋𝑢 / 𝑥⦌𝐵)
26	15, 25	eqtr4i 2757	. 2 ⊢ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ Σ𝑘 ∈ 𝐴 𝐵) = (𝑧 ∈ (𝑋 × 𝑌) ↦ Σ𝑘 ∈ 𝐴 ⦋(2^nd ‘𝑧) / 𝑦⦌⦋(1^st ‘𝑧) / 𝑥⦌𝐵)
27		fsumcn.3	. . 3 ⊢ 𝐾 = (TopOpen‘ℂ_fld)
28		fsumcn.4	. . . 4 ⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋))
29		fsum2cn.7	. . . 4 ⊢ (𝜑 → 𝐿 ∈ (TopOn‘𝑌))
30		txtopon 23446	. . . 4 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐿 ∈ (TopOn‘𝑌)) → (𝐽 ×_t 𝐿) ∈ (TopOn‘(𝑋 × 𝑌)))
31	28, 29, 30	syl2anc 583	. . 3 ⊢ (𝜑 → (𝐽 ×_t 𝐿) ∈ (TopOn‘(𝑋 × 𝑌)))
32		fsumcn.5	. . 3 ⊢ (𝜑 → 𝐴 ∈ Fin)
33		nfcv 2897	. . . . . 6 ⊢ Ⅎ𝑢𝐵
34		nfcv 2897	. . . . . 6 ⊢ Ⅎ𝑣𝐵
35	33, 34, 6, 9, 13	cbvmpo 7498	. . . . 5 ⊢ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵) = (𝑢 ∈ 𝑋, 𝑣 ∈ 𝑌 ↦ ⦋𝑣 / 𝑦⦌⦋𝑢 / 𝑥⦌𝐵)
36	23	mpompt 7517	. . . . 5 ⊢ (𝑧 ∈ (𝑋 × 𝑌) ↦ ⦋(2^nd ‘𝑧) / 𝑦⦌⦋(1^st ‘𝑧) / 𝑥⦌𝐵) = (𝑢 ∈ 𝑋, 𝑣 ∈ 𝑌 ↦ ⦋𝑣 / 𝑦⦌⦋𝑢 / 𝑥⦌𝐵)
37	35, 36	eqtr4i 2757	. . . 4 ⊢ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵) = (𝑧 ∈ (𝑋 × 𝑌) ↦ ⦋(2^nd ‘𝑧) / 𝑦⦌⦋(1^st ‘𝑧) / 𝑥⦌𝐵)
38		fsum2cn.8	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵) ∈ ((𝐽 ×_t 𝐿) Cn 𝐾))
39	37, 38	eqeltrrid 2832	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → (𝑧 ∈ (𝑋 × 𝑌) ↦ ⦋(2^nd ‘𝑧) / 𝑦⦌⦋(1^st ‘𝑧) / 𝑥⦌𝐵) ∈ ((𝐽 ×_t 𝐿) Cn 𝐾))
40	27, 31, 32, 39	fsumcn 24739	. 2 ⊢ (𝜑 → (𝑧 ∈ (𝑋 × 𝑌) ↦ Σ𝑘 ∈ 𝐴 ⦋(2^nd ‘𝑧) / 𝑦⦌⦋(1^st ‘𝑧) / 𝑥⦌𝐵) ∈ ((𝐽 ×_t 𝐿) Cn 𝐾))
41	26, 40	eqeltrid 2831	1 ⊢ (𝜑 → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ Σ𝑘 ∈ 𝐴 𝐵) ∈ ((𝐽 ×_t 𝐿) Cn 𝐾))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1533 ∈ wcel 2098 ⦋csb 3888 ⟨cop 4629 ↦ cmpt 5224 × cxp 5667 ‘cfv 6536 (class class class)co 7404 ∈ cmpo 7406 1^st c1st 7969 2^nd c2nd 7970 Fincfn 8938 Σcsu 15636 TopOpenctopn 17374 ℂ_fldccnfld 21236 TopOnctopon 22763 Cn ccn 23079 ×_t ctx 23415

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7721 ax-inf2 9635 ax-cnex 11165 ax-resscn 11166 ax-1cn 11167 ax-icn 11168 ax-addcl 11169 ax-addrcl 11170 ax-mulcl 11171 ax-mulrcl 11172 ax-mulcom 11173 ax-addass 11174 ax-mulass 11175 ax-distr 11176 ax-i2m1 11177 ax-1ne0 11178 ax-1rid 11179 ax-rnegex 11180 ax-rrecex 11181 ax-cnre 11182 ax-pre-lttri 11183 ax-pre-lttrn 11184 ax-pre-ltadd 11185 ax-pre-mulgt0 11186 ax-pre-sup 11187 ax-addf 11188

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-tp 4628 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-iin 4993 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-se 5625 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6293 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6488 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-isom 6545 df-riota 7360 df-ov 7407 df-oprab 7408 df-mpo 7409 df-of 7666 df-om 7852 df-1st 7971 df-2nd 7972 df-supp 8144 df-frecs 8264 df-wrecs 8295 df-recs 8369 df-rdg 8408 df-1o 8464 df-2o 8465 df-er 8702 df-map 8821 df-ixp 8891 df-en 8939 df-dom 8940 df-sdom 8941 df-fin 8942 df-fsupp 9361 df-fi 9405 df-sup 9436 df-inf 9437 df-oi 9504 df-card 9933 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11447 df-neg 11448 df-div 11873 df-nn 12214 df-2 12276 df-3 12277 df-4 12278 df-5 12279 df-6 12280 df-7 12281 df-8 12282 df-9 12283 df-n0 12474 df-z 12560 df-dec 12679 df-uz 12824 df-q 12934 df-rp 12978 df-xneg 13095 df-xadd 13096 df-xmul 13097 df-icc 13334 df-fz 13488 df-fzo 13631 df-seq 13970 df-exp 14031 df-hash 14294 df-cj 15050 df-re 15051 df-im 15052 df-sqrt 15186 df-abs 15187 df-clim 15436 df-sum 15637 df-struct 17087 df-sets 17104 df-slot 17122 df-ndx 17134 df-base 17152 df-ress 17181 df-plusg 17217 df-mulr 17218 df-starv 17219 df-sca 17220 df-vsca 17221 df-ip 17222 df-tset 17223 df-ple 17224 df-ds 17226 df-unif 17227 df-hom 17228 df-cco 17229 df-rest 17375 df-topn 17376 df-0g 17394 df-gsum 17395 df-topgen 17396 df-pt 17397 df-prds 17400 df-xrs 17455 df-qtop 17460 df-imas 17461 df-xps 17463 df-mre 17537 df-mrc 17538 df-acs 17540 df-mgm 18571 df-sgrp 18650 df-mnd 18666 df-submnd 18712 df-mulg 18994 df-cntz 19231 df-cmn 19700 df-psmet 21228 df-xmet 21229 df-met 21230 df-bl 21231 df-mopn 21232 df-cnfld 21237 df-top 22747 df-topon 22764 df-topsp 22786 df-bases 22800 df-cn 23082 df-cnp 23083 df-tx 23417 df-hmeo 23610 df-xms 24177 df-ms 24178 df-tms 24179

This theorem is referenced by: dipcn 30478

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