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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 5261 | . . 3 ⊢ ∅ ∈ V | |
| 2 | str0.a | . . 3 ⊢ 𝐹 = Slot 𝐼 | |
| 3 | 1, 2 | strfvn 17344 | . 2 ⊢ (𝐹‘∅) = (∅‘𝐼) |
| 4 | 0fv 6918 | . 2 ⊢ (∅‘𝐼) = ∅ | |
| 5 | 3, 4 | eqtr2i 2785 | 1 ⊢ ∅ = (𝐹‘∅) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∅c0 4279 ‘cfv 6531 Slot cslot 17339 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-iota 6487 df-fun 6533 df-fv 6539 df-slot 17340 |
| This theorem is used by: strfvi 17348 setsnid 17366 base0 17372 resseqnbas 17400 oppchomfval 17868 fuchom 18119 xpchomfval 18333 xpccofval 18336 oduleval 18443 0pos 18475 frmdplusg 19030 efmndplusg 19056 oppgplusfval 19542 mgpplusg 20344 opprmulfval 20549 sralem 21431 srasca 21435 sravsca 21436 sraip 21437 zlmlem 21802 zlmvsca 21807 thlle 21983 thloc 21985 psrplusg 22225 psrmulr 22230 psrvscafval 22236 opsrle 22336 ply1plusgfvi 22539 psr1sca2 22548 ply1sca2 22551 resstopn 23484 tnglem 24939 tngds 24947 ttglem 29435 iedgval0 29600 resvlem 33876 sn-base0 43527 mendplusgfval 44141 mendmulrfval 44143 mendsca 44145 mendvscafval 44146 catcrcl 50447 |
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