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| Mirrors > Home > MPE Home > Th. List > str0 | Structured version Visualization version GIF version | ||
| Description: All components of the empty set are empty sets. (Contributed by Stefan O'Rear, 27-Nov-2014.) (Revised by Mario Carneiro, 7-Dec-2014.) |
| Ref | Expression |
|---|---|
| str0.a | ⊢ 𝐹 = Slot 𝐼 |
| Ref | Expression |
|---|---|
| str0 | ⊢ ∅ = (𝐹‘∅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0ex 5254 | . . 3 ⊢ ∅ ∈ V | |
| 2 | str0.a | . . 3 ⊢ 𝐹 = Slot 𝐼 | |
| 3 | 1, 2 | strfvn 17125 | . 2 ⊢ (𝐹‘∅) = (∅‘𝐼) |
| 4 | 0fv 6883 | . 2 ⊢ (∅‘𝐼) = ∅ | |
| 5 | 3, 4 | eqtr2i 2761 | 1 ⊢ ∅ = (𝐹‘∅) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 ∅c0 4287 ‘cfv 6500 Slot cslot 17120 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-nul 5253 ax-pr 5379 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5527 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-iota 6456 df-fun 6502 df-fv 6508 df-slot 17121 |
| This theorem is referenced by: strfvi 17129 setsnid 17147 base0 17153 resseqnbas 17181 oppchomfval 17649 fuchom 17900 xpchomfval 18114 xpccofval 18117 oduleval 18224 0pos 18256 frmdplusg 18791 efmndplusg 18817 oppgplusfval 19289 mgpplusg 20091 opprmulfval 20287 sralem 21140 srasca 21144 sravsca 21145 sraip 21146 zlmlem 21483 zlmvsca 21488 thlle 21664 thloc 21666 psrplusg 21904 psrmulr 21910 psrvscafval 21916 opsrle 22014 ply1plusgfvi 22194 psr1sca2 22203 ply1sca2 22206 resstopn 23142 tnglem 24596 tngds 24604 ttglem 28960 iedgval0 29125 resvlem 33425 sn-base0 42859 mendplusgfval 43532 mendmulrfval 43534 mendsca 43536 mendvscafval 43537 catcrcl 49748 |
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