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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 5175 | . . 3 ⊢ ∅ ∈ V | |
2 | str0.a | . . 3 ⊢ 𝐹 = Slot 𝐼 | |
3 | 1, 2 | strfvn 16497 | . 2 ⊢ (𝐹‘∅) = (∅‘𝐼) |
4 | 0fv 6684 | . 2 ⊢ (∅‘𝐼) = ∅ | |
5 | 3, 4 | eqtr2i 2822 | 1 ⊢ ∅ = (𝐹‘∅) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1538 ∅c0 4243 ‘cfv 6324 Slot cslot 16474 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ral 3111 df-rex 3112 df-v 3443 df-sbc 3721 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-iota 6283 df-fun 6326 df-fv 6332 df-slot 16479 |
This theorem is referenced by: base0 16528 strfvi 16529 setsnid 16531 resslem 16549 oppchomfval 16976 fuchom 17223 xpchomfval 17421 xpccofval 17424 0pos 17556 oduleval 17733 frmdplusg 18011 efmndplusg 18037 oppgplusfval 18468 mgpplusg 19236 opprmulfval 19371 sralem 19942 srasca 19946 sravsca 19947 sraip 19948 zlmlem 20210 zlmvsca 20215 thlle 20386 thloc 20388 psrplusg 20619 psrmulr 20622 psrvscafval 20628 opsrle 20715 ply1plusgfvi 20871 psr1sca2 20880 ply1sca2 20883 resstopn 21791 tnglem 23246 tngds 23254 ttglem 26670 iedgval0 26833 resvlem 30955 mendplusgfval 40129 mendmulrfval 40131 mendsca 40133 mendvscafval 40134 |
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