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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 5260 | . . 3 ⊢ ∅ ∈ V | |
| 2 | str0.a | . . 3 ⊢ 𝐹 = Slot 𝐼 | |
| 3 | 1, 2 | strfvn 17370 | . 2 ⊢ (𝐹‘∅) = (∅‘𝐼) |
| 4 | 0fv 6927 | . 2 ⊢ (∅‘𝐼) = ∅ | |
| 5 | 3, 4 | eqtr2i 2784 | 1 ⊢ ∅ = (𝐹‘∅) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 ∅c0 4278 ‘cfv 6539 Slot cslot 17365 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-iota 6494 df-fun 6541 df-fv 6547 df-slot 17366 |
| This theorem is used by: strfvi 17374 setsnid 17392 base0 17398 resseqnbas 17426 oppchomfval 17894 fuchom 18145 xpchomfval 18359 xpccofval 18362 oduleval 18469 0pos 18501 frmdplusg 19056 efmndplusg 19082 oppgplusfval 19568 mgpplusg 20370 opprmulfval 20575 sralem 21457 srasca 21461 sravsca 21462 sraip 21463 zlmlem 21828 zlmvsca 21833 thlle 22009 thloc 22011 psrplusg 22251 psrmulr 22256 psrvscafval 22262 opsrle 22362 ply1plusgfvi 22565 psr1sca2 22574 ply1sca2 22577 resstopn 23510 tnglem 24965 tngds 24973 ttglem 29459 iedgval0 29624 resvlem 33941 sn-base0 43653 mendplusgfval 44277 mendmulrfval 44279 mendsca 44281 mendvscafval 44282 catcrcl 50624 |
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