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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 5236 | . . 3 ⊢ ∅ ∈ V | |
| 2 | str0.a | . . 3 ⊢ 𝐹 = Slot 𝐼 | |
| 3 | 1, 2 | strfvn 17154 | . 2 ⊢ (𝐹‘∅) = (∅‘𝐼) |
| 4 | 0fv 6875 | . 2 ⊢ (∅‘𝐼) = ∅ | |
| 5 | 3, 4 | eqtr2i 2764 | 1 ⊢ ∅ = (𝐹‘∅) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1547 ∅c0 4268 ‘cfv 6492 Slot cslot 17149 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2712 ax-sep 5225 ax-nul 5235 ax-pr 5369 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ne 2936 df-ral 3055 df-rex 3065 df-rab 3393 df-v 3434 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4269 df-if 4462 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4846 df-br 5080 df-opab 5142 df-mpt 5161 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-iota 6448 df-fun 6494 df-fv 6500 df-slot 17150 |
| This theorem is referenced by: strfvi 17158 setsnid 17176 base0 17182 resseqnbas 17210 oppchomfval 17678 fuchom 17929 xpchomfval 18143 xpccofval 18146 oduleval 18253 0pos 18285 frmdplusg 18820 efmndplusg 18846 oppgplusfval 19321 mgpplusg 20123 opprmulfval 20317 sralem 21173 srasca 21177 sravsca 21178 sraip 21179 zlmlem 21498 zlmvsca 21503 thlle 21679 thloc 21681 psrplusg 21919 psrmulr 21924 psrvscafval 21930 opsrle 22030 ply1plusgfvi 22233 psr1sca2 22242 ply1sca2 22245 resstopn 23176 tnglem 24630 tngds 24638 ttglem 28969 iedgval0 29134 resvlem 33423 sn-base0 42992 mendplusgfval 43633 mendmulrfval 43635 mendsca 43637 mendvscafval 43638 catcrcl 49892 |
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