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Mathbox for Rohan Ridenour |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > gru0eld | Structured version Visualization version GIF version |
Description: A nonempty Grothendieck universe contains the empty set. (Contributed by Rohan Ridenour, 11-Aug-2023.) |
Ref | Expression |
---|---|
gru0eld.1 | ⊢ (𝜑 → 𝐺 ∈ Univ) |
gru0eld.2 | ⊢ (𝜑 → 𝐴 ∈ 𝐺) |
Ref | Expression |
---|---|
gru0eld | ⊢ (𝜑 → ∅ ∈ 𝐺) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | gru0eld.1 | . 2 ⊢ (𝜑 → 𝐺 ∈ Univ) | |
2 | gru0eld.2 | . 2 ⊢ (𝜑 → 𝐴 ∈ 𝐺) | |
3 | 0ss 4406 | . . 3 ⊢ ∅ ⊆ 𝐴 | |
4 | 3 | a1i 11 | . 2 ⊢ (𝜑 → ∅ ⊆ 𝐴) |
5 | gruss 10834 | . 2 ⊢ ((𝐺 ∈ Univ ∧ 𝐴 ∈ 𝐺 ∧ ∅ ⊆ 𝐴) → ∅ ∈ 𝐺) | |
6 | 1, 2, 4, 5 | syl3anc 1370 | 1 ⊢ (𝜑 → ∅ ∈ 𝐺) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2106 ⊆ wss 3963 ∅c0 4339 Univcgru 10828 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-ext 2706 ax-sep 5302 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-sb 2063 df-clab 2713 df-cleq 2727 df-clel 2814 df-ral 3060 df-rex 3069 df-rab 3434 df-v 3480 df-dif 3966 df-un 3968 df-in 3970 df-ss 3980 df-nul 4340 df-if 4532 df-pw 4607 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-br 5149 df-tr 5266 df-iota 6516 df-fv 6571 df-ov 7434 df-gru 10829 |
This theorem is referenced by: grur1cld 44228 grucollcld 44256 |
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