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Mirrors > Home > MPE Home > Th. List > ndmfv | Structured version Visualization version GIF version |
Description: The value of a class outside its domain is the empty set. (Contributed by NM, 24-Aug-1995.) |
Ref | Expression |
---|---|
ndmfv | ⊢ (¬ 𝐴 ∈ dom 𝐹 → (𝐹‘𝐴) = ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | euex 2494 | . . . . 5 ⊢ (∃!𝑥 𝐴𝐹𝑥 → ∃𝑥 𝐴𝐹𝑥) | |
2 | eldmg 5319 | . . . . 5 ⊢ (𝐴 ∈ V → (𝐴 ∈ dom 𝐹 ↔ ∃𝑥 𝐴𝐹𝑥)) | |
3 | 1, 2 | syl5ibr 236 | . . . 4 ⊢ (𝐴 ∈ V → (∃!𝑥 𝐴𝐹𝑥 → 𝐴 ∈ dom 𝐹)) |
4 | 3 | con3d 148 | . . 3 ⊢ (𝐴 ∈ V → (¬ 𝐴 ∈ dom 𝐹 → ¬ ∃!𝑥 𝐴𝐹𝑥)) |
5 | tz6.12-2 6182 | . . 3 ⊢ (¬ ∃!𝑥 𝐴𝐹𝑥 → (𝐹‘𝐴) = ∅) | |
6 | 4, 5 | syl6 35 | . 2 ⊢ (𝐴 ∈ V → (¬ 𝐴 ∈ dom 𝐹 → (𝐹‘𝐴) = ∅)) |
7 | fvprc 6185 | . . 3 ⊢ (¬ 𝐴 ∈ V → (𝐹‘𝐴) = ∅) | |
8 | 7 | a1d 25 | . 2 ⊢ (¬ 𝐴 ∈ V → (¬ 𝐴 ∈ dom 𝐹 → (𝐹‘𝐴) = ∅)) |
9 | 6, 8 | pm2.61i 176 | 1 ⊢ (¬ 𝐴 ∈ dom 𝐹 → (𝐹‘𝐴) = ∅) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 = wceq 1483 ∃wex 1704 ∈ wcel 1990 ∃!weu 2470 Vcvv 3200 ∅c0 3915 class class class wbr 4653 dom cdm 5114 ‘cfv 5888 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-nul 4789 ax-pow 4843 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-dm 5124 df-iota 5851 df-fv 5896 |
This theorem is referenced by: ndmfvrcl 6219 elfvdm 6220 nfvres 6224 fvfundmfvn0 6226 0fv 6227 funfv 6265 fvun1 6269 fvco4i 6276 fvmpti 6281 mptrcl 6289 fvmptss 6292 fvmptex 6294 fvmptnf 6302 fvmptss2 6304 elfvmptrab1 6305 fvopab4ndm 6307 f0cli 6370 funiunfv 6506 ovprc 6683 oprssdm 6815 nssdmovg 6816 ndmovg 6817 1st2val 7194 2nd2val 7195 brovpreldm 7254 curry1val 7270 curry2val 7274 smofvon2 7453 rdgsucmptnf 7525 frsucmptn 7534 brwitnlem 7587 undifixp 7944 r1tr 8639 rankvaln 8662 cardidm 8785 carden2a 8792 carden2b 8793 carddomi2 8796 sdomsdomcardi 8797 pm54.43lem 8825 alephcard 8893 alephnbtwn 8894 alephgeom 8905 cfub 9071 cardcf 9074 cflecard 9075 cfle 9076 cflim2 9085 cfidm 9097 itunisuc 9241 itunitc1 9242 ituniiun 9244 alephadd 9399 alephreg 9404 pwcfsdom 9405 cfpwsdom 9406 adderpq 9778 mulerpq 9779 uzssz 11707 ltweuz 12760 wrdsymb0 13339 lsw0 13352 swrd00 13418 swrd0 13434 sumz 14453 sumss 14455 sumnul 14491 prod1 14674 prodss 14677 divsfval 16207 cidpropd 16370 arwval 16693 coafval 16714 lubval 16984 glbval 16997 joinval 17005 meetval 17019 gsumpropd2lem 17273 mpfrcl 19518 iscnp2 21043 setsmstopn 22283 tngtopn 22454 pcofval 22810 dvbsss 23666 perfdvf 23667 dchrrcl 24965 eleenn 25776 structiedg0val 25911 snstriedgval 25930 rgrx0nd 26490 vsfval 27488 dmadjrnb 28765 hmdmadj 28799 funeldmb 31661 rdgprc0 31699 soseq 31751 nofv 31810 sltres 31815 noseponlem 31817 noextenddif 31821 noextendlt 31822 noextendgt 31823 nolesgn2ores 31825 fvnobday 31829 nosepdmlem 31833 nosepssdm 31836 nosupbnd1lem3 31856 nosupbnd1lem5 31858 nosupbnd2lem1 31861 fullfunfv 32054 linedegen 32250 bj-inftyexpidisj 33097 dibvalrel 36452 dicvalrelN 36474 dihvalrel 36568 itgocn 37734 uz0 39639 climfveq 39901 climfveqf 39912 pfx00 41384 pfx0 41385 setrec2lem1 42440 |
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