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Mirrors > Home > MPE Home > Th. List > mpt0 | Structured version Visualization version GIF version |
Description: A mapping operation with empty domain. (Contributed by Mario Carneiro, 28-Dec-2014.) |
Ref | Expression |
---|---|
mpt0 | ⊢ (𝑥 ∈ ∅ ↦ 𝐴) = ∅ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ral0 4458 | . . 3 ⊢ ∀𝑥 ∈ ∅ 𝐴 ∈ V | |
2 | eqid 2823 | . . . 4 ⊢ (𝑥 ∈ ∅ ↦ 𝐴) = (𝑥 ∈ ∅ ↦ 𝐴) | |
3 | 2 | fnmpt 6490 | . . 3 ⊢ (∀𝑥 ∈ ∅ 𝐴 ∈ V → (𝑥 ∈ ∅ ↦ 𝐴) Fn ∅) |
4 | 1, 3 | ax-mp 5 | . 2 ⊢ (𝑥 ∈ ∅ ↦ 𝐴) Fn ∅ |
5 | fn0 6481 | . 2 ⊢ ((𝑥 ∈ ∅ ↦ 𝐴) Fn ∅ ↔ (𝑥 ∈ ∅ ↦ 𝐴) = ∅) | |
6 | 4, 5 | mpbi 232 | 1 ⊢ (𝑥 ∈ ∅ ↦ 𝐴) = ∅ |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1537 ∈ wcel 2114 ∀wral 3140 Vcvv 3496 ∅c0 4293 ↦ cmpt 5148 Fn wfn 6352 |
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-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-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-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-fun 6359 df-fn 6360 |
This theorem is referenced by: oarec 8190 swrd00 14008 swrdlend 14017 repswswrd 14148 0rest 16705 grpinvfval 18144 grpinvfvalALT 18145 mulgnn0gsum 18236 psgnfval 18630 odfval 18662 odfvalALT 18663 gsumconst 19056 gsum2dlem2 19093 dprd0 19155 staffval 19620 asclfval 20110 mplcoe1 20248 mplcoe5 20251 coe1fzgsumd 20472 evl1gsumd 20522 gsumfsum 20614 pjfval 20852 mavmul0 21163 submafval 21190 mdetfval 21197 nfimdetndef 21200 mdetfval1 21201 mdet0pr 21203 madufval 21248 madugsum 21254 minmar1fval 21257 cramer0 21301 nmfval 23200 mdegfval 24658 gsumvsca1 30856 gsumvsca2 30857 esumnul 31309 esumrnmpt2 31329 sitg0 31606 mrsubfval 32757 msubfval 32773 elmsubrn 32777 mvhfval 32782 msrfval 32786 matunitlindflem1 34890 matunitlindf 34892 poimirlem28 34922 liminf0 42081 cncfiooicc 42184 itgvol0 42260 stoweidlem9 42301 sge0iunmptlemfi 42702 sge0isum 42716 lincval0 44477 |
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