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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 5272 | . . 3 ⊢ ∅ ∈ V | |
| 2 | str0.a | . . 3 ⊢ 𝐹 = Slot 𝐼 | |
| 3 | 1, 2 | strfvn 17246 | . 2 ⊢ (𝐹‘∅) = (∅‘𝐼) |
| 4 | 0fv 6923 | . 2 ⊢ (∅‘𝐼) = ∅ | |
| 5 | 3, 4 | eqtr2i 2793 | 1 ⊢ ∅ = (𝐹‘∅) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1567 ∅c0 4294 ‘cfv 6537 Slot cslot 17241 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pr 5405 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-mpt 5197 df-id 5557 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-iota 6493 df-fun 6539 df-fv 6545 df-slot 17242 |
| This theorem is referenced by: strfvi 17250 setsnid 17268 base0 17274 resseqnbas 17302 oppchomfval 17770 fuchom 18021 xpchomfval 18235 xpccofval 18238 oduleval 18345 0pos 18377 frmdplusg 18913 efmndplusg 18939 oppgplusfval 19418 mgpplusg 20220 opprmulfval 20421 sralem 21275 srasca 21279 sravsca 21280 sraip 21281 zlmlem 21635 zlmvsca 21640 thlle 21816 thloc 21818 psrplusg 22056 psrmulr 22061 psrvscafval 22067 opsrle 22167 ply1plusgfvi 22370 psr1sca2 22379 ply1sca2 22382 resstopn 23312 tnglem 24766 tngds 24774 ttglem 29166 iedgval0 29331 resvlem 33596 sn-base0 43159 mendplusgfval 43800 mendmulrfval 43802 mendsca 43804 mendvscafval 43805 catcrcl 50058 |
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