| Step | Hyp | Ref | Expression | 
|---|
| 1 |  | tsmsid.2 | . . . . . . 7
⊢ (𝜑 → 𝐺 ∈ TopSp) | 
| 2 |  | tsmsid.b | . . . . . . . 8
⊢ 𝐵 = (Base‘𝐺) | 
| 3 |  | tsmsgsum.j | . . . . . . . 8
⊢ 𝐽 = (TopOpen‘𝐺) | 
| 4 | 2, 3 | istps 22941 | . . . . . . 7
⊢ (𝐺 ∈ TopSp ↔ 𝐽 ∈ (TopOn‘𝐵)) | 
| 5 | 1, 4 | sylib 218 | . . . . . 6
⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝐵)) | 
| 6 |  | toponuni 22921 | . . . . . 6
⊢ (𝐽 ∈ (TopOn‘𝐵) → 𝐵 = ∪ 𝐽) | 
| 7 | 5, 6 | syl 17 | . . . . 5
⊢ (𝜑 → 𝐵 = ∪ 𝐽) | 
| 8 | 7 | eleq2d 2826 | . . . 4
⊢ (𝜑 → (𝑥 ∈ 𝐵 ↔ 𝑥 ∈ ∪ 𝐽)) | 
| 9 |  | elfpw 9395 | . . . . . . . . . . . . . . 15
⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) ↔ (𝑦 ⊆ 𝐴 ∧ 𝑦 ∈ Fin)) | 
| 10 | 9 | simplbi 497 | . . . . . . . . . . . . . 14
⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) → 𝑦 ⊆ 𝐴) | 
| 11 | 10 | adantl 481 | . . . . . . . . . . . . 13
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → 𝑦 ⊆ 𝐴) | 
| 12 |  | suppssdm 8203 | . . . . . . . . . . . . . . 15
⊢ (𝐹 supp 0 ) ⊆ dom 𝐹 | 
| 13 |  | tsmsid.f | . . . . . . . . . . . . . . 15
⊢ (𝜑 → 𝐹:𝐴⟶𝐵) | 
| 14 | 12, 13 | fssdm 6754 | . . . . . . . . . . . . . 14
⊢ (𝜑 → (𝐹 supp 0 ) ⊆ 𝐴) | 
| 15 | 14 | ad2antrr 726 | . . . . . . . . . . . . 13
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → (𝐹 supp 0 ) ⊆ 𝐴) | 
| 16 | 11, 15 | unssd 4191 | . . . . . . . . . . . 12
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → (𝑦 ∪ (𝐹 supp 0 )) ⊆ 𝐴) | 
| 17 |  | elinel2 4201 | . . . . . . . . . . . . . 14
⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) → 𝑦 ∈ Fin) | 
| 18 | 17 | adantl 481 | . . . . . . . . . . . . 13
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → 𝑦 ∈ Fin) | 
| 19 |  | tsmsid.w | . . . . . . . . . . . . . . 15
⊢ (𝜑 → 𝐹 finSupp 0 ) | 
| 20 | 19 | ad2antrr 726 | . . . . . . . . . . . . . 14
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → 𝐹 finSupp 0 ) | 
| 21 | 20 | fsuppimpd 9410 | . . . . . . . . . . . . 13
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → (𝐹 supp 0 ) ∈
Fin) | 
| 22 |  | unfi 9212 | . . . . . . . . . . . . 13
⊢ ((𝑦 ∈ Fin ∧ (𝐹 supp 0 ) ∈ Fin) →
(𝑦 ∪ (𝐹 supp 0 )) ∈
Fin) | 
| 23 | 18, 21, 22 | syl2anc 584 | . . . . . . . . . . . 12
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → (𝑦 ∪ (𝐹 supp 0 )) ∈
Fin) | 
| 24 |  | elfpw 9395 | . . . . . . . . . . . 12
⊢ ((𝑦 ∪ (𝐹 supp 0 )) ∈ (𝒫 𝐴 ∩ Fin) ↔ ((𝑦 ∪ (𝐹 supp 0 )) ⊆ 𝐴 ∧ (𝑦 ∪ (𝐹 supp 0 )) ∈
Fin)) | 
| 25 | 16, 23, 24 | sylanbrc 583 | . . . . . . . . . . 11
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → (𝑦 ∪ (𝐹 supp 0 )) ∈ (𝒫 𝐴 ∩ Fin)) | 
| 26 |  | ssun1 4177 | . . . . . . . . . . . . . . 15
⊢ 𝑦 ⊆ (𝑦 ∪ (𝐹 supp 0 )) | 
| 27 |  | id 22 | . . . . . . . . . . . . . . 15
⊢ (𝑧 = (𝑦 ∪ (𝐹 supp 0 )) → 𝑧 = (𝑦 ∪ (𝐹 supp 0 ))) | 
| 28 | 26, 27 | sseqtrrid 4026 | . . . . . . . . . . . . . 14
⊢ (𝑧 = (𝑦 ∪ (𝐹 supp 0 )) → 𝑦 ⊆ 𝑧) | 
| 29 |  | pm5.5 361 | . . . . . . . . . . . . . 14
⊢ (𝑦 ⊆ 𝑧 → ((𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢) ↔ (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢)) | 
| 30 | 28, 29 | syl 17 | . . . . . . . . . . . . 13
⊢ (𝑧 = (𝑦 ∪ (𝐹 supp 0 )) → ((𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢) ↔ (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢)) | 
| 31 |  | reseq2 5991 | . . . . . . . . . . . . . . 15
⊢ (𝑧 = (𝑦 ∪ (𝐹 supp 0 )) → (𝐹 ↾ 𝑧) = (𝐹 ↾ (𝑦 ∪ (𝐹 supp 0 )))) | 
| 32 | 31 | oveq2d 7448 | . . . . . . . . . . . . . 14
⊢ (𝑧 = (𝑦 ∪ (𝐹 supp 0 )) → (𝐺 Σg
(𝐹 ↾ 𝑧)) = (𝐺 Σg (𝐹 ↾ (𝑦 ∪ (𝐹 supp 0 ))))) | 
| 33 | 32 | eleq1d 2825 | . . . . . . . . . . . . 13
⊢ (𝑧 = (𝑦 ∪ (𝐹 supp 0 )) → ((𝐺 Σg
(𝐹 ↾ 𝑧)) ∈ 𝑢 ↔ (𝐺 Σg (𝐹 ↾ (𝑦 ∪ (𝐹 supp 0 )))) ∈ 𝑢)) | 
| 34 | 30, 33 | bitrd 279 | . . . . . . . . . . . 12
⊢ (𝑧 = (𝑦 ∪ (𝐹 supp 0 )) → ((𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢) ↔ (𝐺 Σg (𝐹 ↾ (𝑦 ∪ (𝐹 supp 0 )))) ∈ 𝑢)) | 
| 35 | 34 | rspcv 3617 | . . . . . . . . . . 11
⊢ ((𝑦 ∪ (𝐹 supp 0 )) ∈ (𝒫 𝐴 ∩ Fin) →
(∀𝑧 ∈
(𝒫 𝐴 ∩
Fin)(𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢) → (𝐺 Σg (𝐹 ↾ (𝑦 ∪ (𝐹 supp 0 )))) ∈ 𝑢)) | 
| 36 | 25, 35 | syl 17 | . . . . . . . . . 10
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → (∀𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢) → (𝐺 Σg (𝐹 ↾ (𝑦 ∪ (𝐹 supp 0 )))) ∈ 𝑢)) | 
| 37 |  | tsmsid.z | . . . . . . . . . . . 12
⊢  0 =
(0g‘𝐺) | 
| 38 |  | tsmsid.1 | . . . . . . . . . . . . 13
⊢ (𝜑 → 𝐺 ∈ CMnd) | 
| 39 | 38 | ad2antrr 726 | . . . . . . . . . . . 12
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → 𝐺 ∈ CMnd) | 
| 40 |  | tsmsid.a | . . . . . . . . . . . . 13
⊢ (𝜑 → 𝐴 ∈ 𝑉) | 
| 41 | 40 | ad2antrr 726 | . . . . . . . . . . . 12
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → 𝐴 ∈ 𝑉) | 
| 42 | 13 | ad2antrr 726 | . . . . . . . . . . . 12
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → 𝐹:𝐴⟶𝐵) | 
| 43 |  | ssun2 4178 | . . . . . . . . . . . . 13
⊢ (𝐹 supp 0 ) ⊆ (𝑦 ∪ (𝐹 supp 0 )) | 
| 44 | 43 | a1i 11 | . . . . . . . . . . . 12
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → (𝐹 supp 0 ) ⊆ (𝑦 ∪ (𝐹 supp 0 ))) | 
| 45 | 2, 37, 39, 41, 42, 44, 20 | gsumres 19932 | . . . . . . . . . . 11
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → (𝐺 Σg (𝐹 ↾ (𝑦 ∪ (𝐹 supp 0 )))) = (𝐺 Σg 𝐹)) | 
| 46 | 45 | eleq1d 2825 | . . . . . . . . . 10
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → ((𝐺 Σg (𝐹 ↾ (𝑦 ∪ (𝐹 supp 0 )))) ∈ 𝑢 ↔ (𝐺 Σg 𝐹) ∈ 𝑢)) | 
| 47 | 36, 46 | sylibd 239 | . . . . . . . . 9
⊢ (((𝜑 ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝒫 𝐴 ∩ Fin)) → (∀𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢) → (𝐺 Σg 𝐹) ∈ 𝑢)) | 
| 48 | 47 | rexlimdva 3154 | . . . . . . . 8
⊢ ((𝜑 ∧ 𝑢 ∈ 𝐽) → (∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)∀𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢) → (𝐺 Σg 𝐹) ∈ 𝑢)) | 
| 49 | 19 | fsuppimpd 9410 | . . . . . . . . . . 11
⊢ (𝜑 → (𝐹 supp 0 ) ∈
Fin) | 
| 50 |  | elfpw 9395 | . . . . . . . . . . 11
⊢ ((𝐹 supp 0 ) ∈ (𝒫 𝐴 ∩ Fin) ↔ ((𝐹 supp 0 ) ⊆ 𝐴 ∧ (𝐹 supp 0 ) ∈
Fin)) | 
| 51 | 14, 49, 50 | sylanbrc 583 | . . . . . . . . . 10
⊢ (𝜑 → (𝐹 supp 0 ) ∈ (𝒫 𝐴 ∩ Fin)) | 
| 52 | 38 | ad2antrr 726 | . . . . . . . . . . . . . 14
⊢ (((𝜑 ∧ (𝑢 ∈ 𝐽 ∧ (𝐺 Σg 𝐹) ∈ 𝑢)) ∧ (𝑧 ∈ (𝒫 𝐴 ∩ Fin) ∧ (𝐹 supp 0 ) ⊆ 𝑧)) → 𝐺 ∈ CMnd) | 
| 53 | 40 | ad2antrr 726 | . . . . . . . . . . . . . 14
⊢ (((𝜑 ∧ (𝑢 ∈ 𝐽 ∧ (𝐺 Σg 𝐹) ∈ 𝑢)) ∧ (𝑧 ∈ (𝒫 𝐴 ∩ Fin) ∧ (𝐹 supp 0 ) ⊆ 𝑧)) → 𝐴 ∈ 𝑉) | 
| 54 | 13 | ad2antrr 726 | . . . . . . . . . . . . . 14
⊢ (((𝜑 ∧ (𝑢 ∈ 𝐽 ∧ (𝐺 Σg 𝐹) ∈ 𝑢)) ∧ (𝑧 ∈ (𝒫 𝐴 ∩ Fin) ∧ (𝐹 supp 0 ) ⊆ 𝑧)) → 𝐹:𝐴⟶𝐵) | 
| 55 |  | simprr 772 | . . . . . . . . . . . . . 14
⊢ (((𝜑 ∧ (𝑢 ∈ 𝐽 ∧ (𝐺 Σg 𝐹) ∈ 𝑢)) ∧ (𝑧 ∈ (𝒫 𝐴 ∩ Fin) ∧ (𝐹 supp 0 ) ⊆ 𝑧)) → (𝐹 supp 0 ) ⊆ 𝑧) | 
| 56 | 19 | ad2antrr 726 | . . . . . . . . . . . . . 14
⊢ (((𝜑 ∧ (𝑢 ∈ 𝐽 ∧ (𝐺 Σg 𝐹) ∈ 𝑢)) ∧ (𝑧 ∈ (𝒫 𝐴 ∩ Fin) ∧ (𝐹 supp 0 ) ⊆ 𝑧)) → 𝐹 finSupp 0 ) | 
| 57 | 2, 37, 52, 53, 54, 55, 56 | gsumres 19932 | . . . . . . . . . . . . 13
⊢ (((𝜑 ∧ (𝑢 ∈ 𝐽 ∧ (𝐺 Σg 𝐹) ∈ 𝑢)) ∧ (𝑧 ∈ (𝒫 𝐴 ∩ Fin) ∧ (𝐹 supp 0 ) ⊆ 𝑧)) → (𝐺 Σg (𝐹 ↾ 𝑧)) = (𝐺 Σg 𝐹)) | 
| 58 |  | simplrr 777 | . . . . . . . . . . . . 13
⊢ (((𝜑 ∧ (𝑢 ∈ 𝐽 ∧ (𝐺 Σg 𝐹) ∈ 𝑢)) ∧ (𝑧 ∈ (𝒫 𝐴 ∩ Fin) ∧ (𝐹 supp 0 ) ⊆ 𝑧)) → (𝐺 Σg 𝐹) ∈ 𝑢) | 
| 59 | 57, 58 | eqeltrd 2840 | . . . . . . . . . . . 12
⊢ (((𝜑 ∧ (𝑢 ∈ 𝐽 ∧ (𝐺 Σg 𝐹) ∈ 𝑢)) ∧ (𝑧 ∈ (𝒫 𝐴 ∩ Fin) ∧ (𝐹 supp 0 ) ⊆ 𝑧)) → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢) | 
| 60 | 59 | expr 456 | . . . . . . . . . . 11
⊢ (((𝜑 ∧ (𝑢 ∈ 𝐽 ∧ (𝐺 Σg 𝐹) ∈ 𝑢)) ∧ 𝑧 ∈ (𝒫 𝐴 ∩ Fin)) → ((𝐹 supp 0 ) ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢)) | 
| 61 | 60 | ralrimiva 3145 | . . . . . . . . . 10
⊢ ((𝜑 ∧ (𝑢 ∈ 𝐽 ∧ (𝐺 Σg 𝐹) ∈ 𝑢)) → ∀𝑧 ∈ (𝒫 𝐴 ∩ Fin)((𝐹 supp 0 ) ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢)) | 
| 62 |  | sseq1 4008 | . . . . . . . . . . 11
⊢ (𝑦 = (𝐹 supp 0 ) → (𝑦 ⊆ 𝑧 ↔ (𝐹 supp 0 ) ⊆ 𝑧)) | 
| 63 | 62 | rspceaimv 3627 | . . . . . . . . . 10
⊢ (((𝐹 supp 0 ) ∈ (𝒫 𝐴 ∩ Fin) ∧ ∀𝑧 ∈ (𝒫 𝐴 ∩ Fin)((𝐹 supp 0 ) ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢)) → ∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)∀𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢)) | 
| 64 | 51, 61, 63 | syl2an2r 685 | . . . . . . . . 9
⊢ ((𝜑 ∧ (𝑢 ∈ 𝐽 ∧ (𝐺 Σg 𝐹) ∈ 𝑢)) → ∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)∀𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢)) | 
| 65 | 64 | expr 456 | . . . . . . . 8
⊢ ((𝜑 ∧ 𝑢 ∈ 𝐽) → ((𝐺 Σg 𝐹) ∈ 𝑢 → ∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)∀𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢))) | 
| 66 | 48, 65 | impbid 212 | . . . . . . 7
⊢ ((𝜑 ∧ 𝑢 ∈ 𝐽) → (∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)∀𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢) ↔ (𝐺 Σg 𝐹) ∈ 𝑢)) | 
| 67 |  | disjsn 4710 | . . . . . . . 8
⊢ ((𝑢 ∩ {(𝐺 Σg 𝐹)}) = ∅ ↔ ¬
(𝐺
Σg 𝐹) ∈ 𝑢) | 
| 68 | 67 | necon2abii 2990 | . . . . . . 7
⊢ ((𝐺 Σg
𝐹) ∈ 𝑢 ↔ (𝑢 ∩ {(𝐺 Σg 𝐹)}) ≠
∅) | 
| 69 | 66, 68 | bitrdi 287 | . . . . . 6
⊢ ((𝜑 ∧ 𝑢 ∈ 𝐽) → (∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)∀𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢) ↔ (𝑢 ∩ {(𝐺 Σg 𝐹)}) ≠
∅)) | 
| 70 | 69 | imbi2d 340 | . . . . 5
⊢ ((𝜑 ∧ 𝑢 ∈ 𝐽) → ((𝑥 ∈ 𝑢 → ∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)∀𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢)) ↔ (𝑥 ∈ 𝑢 → (𝑢 ∩ {(𝐺 Σg 𝐹)}) ≠
∅))) | 
| 71 | 70 | ralbidva 3175 | . . . 4
⊢ (𝜑 → (∀𝑢 ∈ 𝐽 (𝑥 ∈ 𝑢 → ∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)∀𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢)) ↔ ∀𝑢 ∈ 𝐽 (𝑥 ∈ 𝑢 → (𝑢 ∩ {(𝐺 Σg 𝐹)}) ≠
∅))) | 
| 72 | 8, 71 | anbi12d 632 | . . 3
⊢ (𝜑 → ((𝑥 ∈ 𝐵 ∧ ∀𝑢 ∈ 𝐽 (𝑥 ∈ 𝑢 → ∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)∀𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢))) ↔ (𝑥 ∈ ∪ 𝐽 ∧ ∀𝑢 ∈ 𝐽 (𝑥 ∈ 𝑢 → (𝑢 ∩ {(𝐺 Σg 𝐹)}) ≠
∅)))) | 
| 73 |  | eqid 2736 | . . . 4
⊢
(𝒫 𝐴 ∩
Fin) = (𝒫 𝐴 ∩
Fin) | 
| 74 | 2, 3, 73, 38, 1, 40, 13 | eltsms 24142 | . . 3
⊢ (𝜑 → (𝑥 ∈ (𝐺 tsums 𝐹) ↔ (𝑥 ∈ 𝐵 ∧ ∀𝑢 ∈ 𝐽 (𝑥 ∈ 𝑢 → ∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)∀𝑧 ∈ (𝒫 𝐴 ∩ Fin)(𝑦 ⊆ 𝑧 → (𝐺 Σg (𝐹 ↾ 𝑧)) ∈ 𝑢))))) | 
| 75 |  | topontop 22920 | . . . . 5
⊢ (𝐽 ∈ (TopOn‘𝐵) → 𝐽 ∈ Top) | 
| 76 | 5, 75 | syl 17 | . . . 4
⊢ (𝜑 → 𝐽 ∈ Top) | 
| 77 | 2, 37, 38, 40, 13, 19 | gsumcl 19934 | . . . . . 6
⊢ (𝜑 → (𝐺 Σg 𝐹) ∈ 𝐵) | 
| 78 | 77 | snssd 4808 | . . . . 5
⊢ (𝜑 → {(𝐺 Σg 𝐹)} ⊆ 𝐵) | 
| 79 | 78, 7 | sseqtrd 4019 | . . . 4
⊢ (𝜑 → {(𝐺 Σg 𝐹)} ⊆ ∪ 𝐽) | 
| 80 |  | eqid 2736 | . . . . 5
⊢ ∪ 𝐽 =
∪ 𝐽 | 
| 81 | 80 | elcls2 23083 | . . . 4
⊢ ((𝐽 ∈ Top ∧ {(𝐺 Σg
𝐹)} ⊆ ∪ 𝐽)
→ (𝑥 ∈
((cls‘𝐽)‘{(𝐺 Σg 𝐹)}) ↔ (𝑥 ∈ ∪ 𝐽 ∧ ∀𝑢 ∈ 𝐽 (𝑥 ∈ 𝑢 → (𝑢 ∩ {(𝐺 Σg 𝐹)}) ≠
∅)))) | 
| 82 | 76, 79, 81 | syl2anc 584 | . . 3
⊢ (𝜑 → (𝑥 ∈ ((cls‘𝐽)‘{(𝐺 Σg 𝐹)}) ↔ (𝑥 ∈ ∪ 𝐽 ∧ ∀𝑢 ∈ 𝐽 (𝑥 ∈ 𝑢 → (𝑢 ∩ {(𝐺 Σg 𝐹)}) ≠
∅)))) | 
| 83 | 72, 74, 82 | 3bitr4d 311 | . 2
⊢ (𝜑 → (𝑥 ∈ (𝐺 tsums 𝐹) ↔ 𝑥 ∈ ((cls‘𝐽)‘{(𝐺 Σg 𝐹)}))) | 
| 84 | 83 | eqrdv 2734 | 1
⊢ (𝜑 → (𝐺 tsums 𝐹) = ((cls‘𝐽)‘{(𝐺 Σg 𝐹)})) |