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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 5252 | . . 3 ⊢ ∅ ∈ V | |
| 2 | str0.a | . . 3 ⊢ 𝐹 = Slot 𝐼 | |
| 3 | 1, 2 | strfvn 17113 | . 2 ⊢ (𝐹‘∅) = (∅‘𝐼) |
| 4 | 0fv 6875 | . 2 ⊢ (∅‘𝐼) = ∅ | |
| 5 | 3, 4 | eqtr2i 2760 | 1 ⊢ ∅ = (𝐹‘∅) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 ∅c0 4285 ‘cfv 6492 Slot cslot 17108 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-mpt 5180 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 17109 |
| This theorem is referenced by: strfvi 17117 setsnid 17135 base0 17141 resseqnbas 17169 oppchomfval 17637 fuchom 17888 xpchomfval 18102 xpccofval 18105 oduleval 18212 0pos 18244 frmdplusg 18779 efmndplusg 18805 oppgplusfval 19277 mgpplusg 20079 opprmulfval 20275 sralem 21128 srasca 21132 sravsca 21133 sraip 21134 zlmlem 21471 zlmvsca 21476 thlle 21652 thloc 21654 psrplusg 21892 psrmulr 21898 psrvscafval 21904 opsrle 22002 ply1plusgfvi 22182 psr1sca2 22191 ply1sca2 22194 resstopn 23130 tnglem 24584 tngds 24592 ttglem 28948 iedgval0 29113 resvlem 33414 sn-base0 42746 mendplusgfval 43419 mendmulrfval 43421 mendsca 43423 mendvscafval 43424 catcrcl 49636 |
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