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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 5213 | . . 3 ⊢ ∅ ∈ V | |
2 | str0.a | . . 3 ⊢ 𝐹 = Slot 𝐼 | |
3 | 1, 2 | strfvn 16507 | . 2 ⊢ (𝐹‘∅) = (∅‘𝐼) |
4 | 0fv 6711 | . 2 ⊢ (∅‘𝐼) = ∅ | |
5 | 3, 4 | eqtr2i 2847 | 1 ⊢ ∅ = (𝐹‘∅) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1537 ∅c0 4293 ‘cfv 6357 Slot cslot 16484 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-sbc 3775 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-br 5069 df-opab 5131 df-mpt 5149 df-id 5462 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-iota 6316 df-fun 6359 df-fv 6365 df-slot 16489 |
This theorem is referenced by: base0 16538 strfvi 16539 setsnid 16541 resslem 16559 oppchomfval 16986 fuchom 17233 xpchomfval 17431 xpccofval 17434 0pos 17566 oduleval 17743 frmdplusg 18021 efmndplusg 18047 oppgplusfval 18478 mgpplusg 19245 opprmulfval 19377 sralem 19951 srasca 19955 sravsca 19956 sraip 19957 psrplusg 20163 psrmulr 20166 psrvscafval 20172 opsrle 20258 ply1plusgfvi 20412 psr1sca2 20421 ply1sca2 20424 zlmlem 20666 zlmvsca 20671 thlle 20843 thloc 20845 resstopn 21796 tnglem 23251 tngds 23259 ttglem 26664 iedgval0 26827 resvlem 30906 mendplusgfval 39792 mendmulrfval 39794 mendsca 39796 mendvscafval 39797 |
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