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Mirrors > Home > MPE Home > Th. List > elbasov | Structured version Visualization version GIF version |
Description: Utility theorem: reverse closure for any structure defined as a two-argument function. (Contributed by Mario Carneiro, 3-Oct-2015.) |
Ref | Expression |
---|---|
elbasov.o | ⊢ Rel dom 𝑂 |
elbasov.s | ⊢ 𝑆 = (𝑋𝑂𝑌) |
elbasov.b | ⊢ 𝐵 = (Base‘𝑆) |
Ref | Expression |
---|---|
elbasov | ⊢ (𝐴 ∈ 𝐵 → (𝑋 ∈ V ∧ 𝑌 ∈ V)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | n0i 3920 | . 2 ⊢ (𝐴 ∈ 𝐵 → ¬ 𝐵 = ∅) | |
2 | elbasov.s | . . . . 5 ⊢ 𝑆 = (𝑋𝑂𝑌) | |
3 | elbasov.o | . . . . . 6 ⊢ Rel dom 𝑂 | |
4 | 3 | ovprc 6683 | . . . . 5 ⊢ (¬ (𝑋 ∈ V ∧ 𝑌 ∈ V) → (𝑋𝑂𝑌) = ∅) |
5 | 2, 4 | syl5eq 2668 | . . . 4 ⊢ (¬ (𝑋 ∈ V ∧ 𝑌 ∈ V) → 𝑆 = ∅) |
6 | 5 | fveq2d 6195 | . . 3 ⊢ (¬ (𝑋 ∈ V ∧ 𝑌 ∈ V) → (Base‘𝑆) = (Base‘∅)) |
7 | elbasov.b | . . 3 ⊢ 𝐵 = (Base‘𝑆) | |
8 | base0 15912 | . . 3 ⊢ ∅ = (Base‘∅) | |
9 | 6, 7, 8 | 3eqtr4g 2681 | . 2 ⊢ (¬ (𝑋 ∈ V ∧ 𝑌 ∈ V) → 𝐵 = ∅) |
10 | 1, 9 | nsyl2 142 | 1 ⊢ (𝐴 ∈ 𝐵 → (𝑋 ∈ V ∧ 𝑌 ∈ V)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 384 = wceq 1483 ∈ wcel 1990 Vcvv 3200 ∅c0 3915 dom cdm 5114 Rel wrel 5119 ‘cfv 5888 (class class class)co 6650 Basecbs 15857 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-sbc 3436 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-iota 5851 df-fun 5890 df-fv 5896 df-ov 6653 df-slot 15861 df-base 15863 |
This theorem is referenced by: strov2rcl 15922 psrelbas 19379 psraddcl 19383 psrmulcllem 19387 psrvscafval 19390 psrvscacl 19393 resspsradd 19416 resspsrmul 19417 cphsubrglem 22977 mdegcl 23829 |
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