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Mirrors > Home > MPE Home > Th. List > Mathboxes > fneref | Structured version Visualization version GIF version |
Description: Reflexivity of the fineness relation. (Contributed by Jeff Hankins, 12-Oct-2009.) |
Ref | Expression |
---|---|
fneref | ⊢ (𝐴 ∈ 𝑉 → 𝐴Fne𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2736 | . . 3 ⊢ ∪ 𝐴 = ∪ 𝐴 | |
2 | ssid 3954 | . . . . 5 ⊢ 𝑥 ⊆ 𝑥 | |
3 | elequ2 2120 | . . . . . . 7 ⊢ (𝑧 = 𝑥 → (𝑦 ∈ 𝑧 ↔ 𝑦 ∈ 𝑥)) | |
4 | sseq1 3957 | . . . . . . 7 ⊢ (𝑧 = 𝑥 → (𝑧 ⊆ 𝑥 ↔ 𝑥 ⊆ 𝑥)) | |
5 | 3, 4 | anbi12d 631 | . . . . . 6 ⊢ (𝑧 = 𝑥 → ((𝑦 ∈ 𝑧 ∧ 𝑧 ⊆ 𝑥) ↔ (𝑦 ∈ 𝑥 ∧ 𝑥 ⊆ 𝑥))) |
6 | 5 | rspcev 3570 | . . . . 5 ⊢ ((𝑥 ∈ 𝐴 ∧ (𝑦 ∈ 𝑥 ∧ 𝑥 ⊆ 𝑥)) → ∃𝑧 ∈ 𝐴 (𝑦 ∈ 𝑧 ∧ 𝑧 ⊆ 𝑥)) |
7 | 2, 6 | mpanr2 701 | . . . 4 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝑥) → ∃𝑧 ∈ 𝐴 (𝑦 ∈ 𝑧 ∧ 𝑧 ⊆ 𝑥)) |
8 | 7 | rgen2 3190 | . . 3 ⊢ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝑥 ∃𝑧 ∈ 𝐴 (𝑦 ∈ 𝑧 ∧ 𝑧 ⊆ 𝑥) |
9 | 1, 8 | pm3.2i 471 | . 2 ⊢ (∪ 𝐴 = ∪ 𝐴 ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝑥 ∃𝑧 ∈ 𝐴 (𝑦 ∈ 𝑧 ∧ 𝑧 ⊆ 𝑥)) |
10 | 1, 1 | isfne2 34627 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝐴Fne𝐴 ↔ (∪ 𝐴 = ∪ 𝐴 ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝑥 ∃𝑧 ∈ 𝐴 (𝑦 ∈ 𝑧 ∧ 𝑧 ⊆ 𝑥)))) |
11 | 9, 10 | mpbiri 257 | 1 ⊢ (𝐴 ∈ 𝑉 → 𝐴Fne𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1540 ∈ wcel 2105 ∀wral 3061 ∃wrex 3070 ⊆ wss 3898 ∪ cuni 4852 class class class wbr 5092 Fnecfne 34621 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2707 ax-sep 5243 ax-nul 5250 ax-pow 5308 ax-pr 5372 ax-un 7650 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2886 df-ne 2941 df-ral 3062 df-rex 3071 df-rab 3404 df-v 3443 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4270 df-if 4474 df-pw 4549 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4853 df-br 5093 df-opab 5155 df-mpt 5176 df-id 5518 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-iota 6431 df-fun 6481 df-fv 6487 df-topgen 17251 df-fne 34622 |
This theorem is referenced by: (None) |
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