| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > dprdval0prc | Structured version Visualization version GIF version | ||
| Description: The internal direct product of a family of subgroups indexed by a proper class is empty. (Contributed by AV, 13-Jul-2019.) |
| Ref | Expression |
|---|---|
| dprdval0prc | ⊢ (dom 𝑆 ∉ V → (𝐺 DProd 𝑆) = ∅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-nel 3071 | . . 3 ⊢ (dom 𝑆 ∉ V ↔ ¬ dom 𝑆 ∈ V) | |
| 2 | dmexg 7894 | . . . 4 ⊢ (𝑆 ∈ V → dom 𝑆 ∈ V) | |
| 3 | 2 | con3i 155 | . . 3 ⊢ (¬ dom 𝑆 ∈ V → ¬ 𝑆 ∈ V) |
| 4 | 1, 3 | sylbi 220 | . 2 ⊢ (dom 𝑆 ∉ V → ¬ 𝑆 ∈ V) |
| 5 | reldmdprd 20065 | . . 3 ⊢ Rel dom DProd | |
| 6 | 5 | ovprc2 7448 | . 2 ⊢ (¬ 𝑆 ∈ V → (𝐺 DProd 𝑆) = ∅) |
| 7 | 4, 6 | syl 18 | 1 ⊢ (dom 𝑆 ∉ V → (𝐺 DProd 𝑆) = ∅) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 = wceq 1567 ∈ wcel 2149 ∉ wnel 3070 Vcvv 3463 ∅c0 4294 dom cdm 5659 (class class class)co 7408 DProd cdprd 20061 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5258 ax-nul 5268 ax-pr 5402 ax-un 7730 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-br 5111 df-opab 5175 df-xp 5665 df-rel 5666 df-cnv 5667 df-dm 5669 df-rn 5670 df-iota 6489 df-fv 6541 df-ov 7411 df-oprab 7412 df-mpo 7413 df-dprd 20063 |
| This theorem is referenced by: (None) |
| Copyright terms: Public domain | W3C validator |