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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 5271 | . . 3 ⊢ ∅ ∈ V | |
| 2 | str0.a | . . 3 ⊢ 𝐹 = Slot 𝐼 | |
| 3 | 1, 2 | strfvn 17247 | . 2 ⊢ (𝐹‘∅) = (∅‘𝐼) |
| 4 | 0fv 6924 | . 2 ⊢ (∅‘𝐼) = ∅ | |
| 5 | 3, 4 | eqtr2i 2787 | 1 ⊢ ∅ = (𝐹‘∅) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1570 ∅c0 4287 ‘cfv 6538 Slot cslot 17242 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-nul 5270 ax-pr 5406 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-opab 5175 df-mpt 5194 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-iota 6494 df-fun 6540 df-fv 6546 df-slot 17243 |
| This theorem is referenced by: strfvi 17251 setsnid 17269 base0 17275 resseqnbas 17303 oppchomfval 17771 fuchom 18022 xpchomfval 18236 xpccofval 18239 oduleval 18346 0pos 18378 frmdplusg 18914 efmndplusg 18940 oppgplusfval 19419 mgpplusg 20221 opprmulfval 20422 sralem 21278 srasca 21282 sravsca 21283 sraip 21284 zlmlem 21647 zlmvsca 21652 thlle 21828 thloc 21830 psrplusg 22068 psrmulr 22073 psrvscafval 22079 opsrle 22179 ply1plusgfvi 22382 psr1sca2 22391 ply1sca2 22394 resstopn 23324 tnglem 24778 tngds 24786 ttglem 29206 iedgval0 29371 resvlem 33634 sn-base0 43250 mendplusgfval 43891 mendmulrfval 43893 mendsca 43895 mendvscafval 43896 catcrcl 50156 |
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