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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 5242 | . . 3 ⊢ ∅ ∈ V | |
| 2 | str0.a | . . 3 ⊢ 𝐹 = Slot 𝐼 | |
| 3 | 1, 2 | strfvn 17147 | . 2 ⊢ (𝐹‘∅) = (∅‘𝐼) |
| 4 | 0fv 6875 | . 2 ⊢ (∅‘𝐼) = ∅ | |
| 5 | 3, 4 | eqtr2i 2761 | 1 ⊢ ∅ = (𝐹‘∅) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 ∅c0 4274 ‘cfv 6492 Slot cslot 17142 |
| 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 5231 ax-nul 5241 ax-pr 5370 |
| 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 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-iota 6448 df-fun 6494 df-fv 6500 df-slot 17143 |
| This theorem is referenced by: strfvi 17151 setsnid 17169 base0 17175 resseqnbas 17203 oppchomfval 17671 fuchom 17922 xpchomfval 18136 xpccofval 18139 oduleval 18246 0pos 18278 frmdplusg 18813 efmndplusg 18839 oppgplusfval 19314 mgpplusg 20116 opprmulfval 20310 sralem 21163 srasca 21167 sravsca 21168 sraip 21169 zlmlem 21506 zlmvsca 21511 thlle 21687 thloc 21689 psrplusg 21926 psrmulr 21931 psrvscafval 21937 opsrle 22035 ply1plusgfvi 22215 psr1sca2 22224 ply1sca2 22227 resstopn 23161 tnglem 24615 tngds 24623 ttglem 28958 iedgval0 29123 resvlem 33408 sn-base0 42954 mendplusgfval 43627 mendmulrfval 43629 mendsca 43631 mendvscafval 43632 catcrcl 49882 |
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