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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. (An artifact of our function value definition.) (Contributed by NM, 24-Aug-1995.) |
| Ref | Expression |
|---|---|
| ndmfv | ⊢ (¬ 𝐴 ∈ dom 𝐹 → (𝐹‘𝐴) = ∅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | euex 2571 | . . . . 5 ⊢ (∃!𝑥 𝐴𝐹𝑥 → ∃𝑥 𝐴𝐹𝑥) | |
| 2 | eldmg 5836 | . . . . 5 ⊢ (𝐴 ∈ V → (𝐴 ∈ dom 𝐹 ↔ ∃𝑥 𝐴𝐹𝑥)) | |
| 3 | 1, 2 | imbitrrid 246 | . . . 4 ⊢ (𝐴 ∈ V → (∃!𝑥 𝐴𝐹𝑥 → 𝐴 ∈ dom 𝐹)) |
| 4 | 3 | con3d 152 | . . 3 ⊢ (𝐴 ∈ V → (¬ 𝐴 ∈ dom 𝐹 → ¬ ∃!𝑥 𝐴𝐹𝑥)) |
| 5 | tz6.12-2 6805 | . . 3 ⊢ (¬ ∃!𝑥 𝐴𝐹𝑥 → (𝐹‘𝐴) = ∅) | |
| 6 | 4, 5 | syl6 35 | . 2 ⊢ (𝐴 ∈ V → (¬ 𝐴 ∈ dom 𝐹 → (𝐹‘𝐴) = ∅)) |
| 7 | fvprc 6809 | . . 3 ⊢ (¬ 𝐴 ∈ V → (𝐹‘𝐴) = ∅) | |
| 8 | 7 | a1d 25 | . 2 ⊢ (¬ 𝐴 ∈ V → (¬ 𝐴 ∈ dom 𝐹 → (𝐹‘𝐴) = ∅)) |
| 9 | 6, 8 | pm2.61i 182 | 1 ⊢ (¬ 𝐴 ∈ dom 𝐹 → (𝐹‘𝐴) = ∅) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 = wceq 1541 ∃wex 1780 ∈ wcel 2110 ∃!weu 2562 Vcvv 3434 ∅c0 4281 class class class wbr 5089 dom cdm 5614 ‘cfv 6477 |
| 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 1968 ax-7 2009 ax-8 2112 ax-9 2120 ax-10 2143 ax-11 2159 ax-12 2179 ax-ext 2702 ax-nul 5242 ax-pr 5368 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-ral 3046 df-rex 3055 df-rab 3394 df-v 3436 df-dif 3903 df-un 3905 df-ss 3917 df-nul 4282 df-if 4474 df-sn 4575 df-pr 4577 df-op 4581 df-uni 4858 df-br 5090 df-dm 5624 df-iota 6433 df-fv 6485 |
| This theorem is referenced by: ndmfvrcl 6850 elfvdm 6851 nfvres 6855 fvfundmfvn0 6857 0fv 6858 funfv 6904 fvun1 6908 fvco4i 6918 fvmpti 6923 mptrcl 6933 fvmptss 6936 fvmptex 6938 fvmptnf 6946 fvmptss2 6950 elfvmptrab1 6952 fvopab4ndm 6954 f0cli 7026 funiunfv 7177 funeldmb 7288 ovprc 7379 oprssdm 7522 nssdmovg 7523 ndmovg 7524 1st2val 7944 2nd2val 7945 brovpreldm 8014 soseq 8084 smofvon2 8271 rdgsucmptnf 8343 frsucmptn 8353 brwitnlem 8417 undifixp 8853 r1tr 9661 rankvaln 9684 cardidm 9844 carden2a 9851 carden2b 9852 carddomi2 9855 sdomsdomcardi 9856 pm54.43lem 9885 alephcard 9953 alephnbtwn 9954 alephgeom 9965 cfub 10132 cardcf 10135 cflecard 10136 cfle 10137 cflim2 10146 cfidm 10158 itunisuc 10302 itunitc1 10303 ituniiun 10305 alephadd 10460 alephreg 10465 pwcfsdom 10466 cfpwsdom 10467 adderpq 10839 mulerpq 10840 uzssz 12745 ltweuz 13860 wrdsymb0 14448 lsw0 14464 swrd00 14544 swrd0 14558 pfx00 14574 pfx0 14575 sumz 15621 sumss 15623 sumnul 15659 prod1 15843 prodss 15846 divsfval 17443 cidpropd 17608 lubval 18252 glbval 18265 joinval 18273 meetval 18287 gsumpropd2lem 18579 mulgfval 18974 mpfrcl 22013 iscnp2 23147 setsmstopn 24386 tngtopn 24558 dvbsss 25823 perfdvf 25824 dchrrcl 27171 nofv 27589 sltres 27594 noseponlem 27596 noextenddif 27600 noextendlt 27601 noextendgt 27602 nolesgn2ores 27604 nogesgn1ores 27606 fvnobday 27610 nosepdmlem 27615 nosepssdm 27618 nosupbnd1lem3 27642 nosupbnd1lem5 27644 nosupbnd2lem1 27647 noinfbnd1lem3 27657 noinfbnd1lem5 27659 noinfbnd2lem1 27662 newval 27789 leftval 27797 rightval 27798 lltropt 27810 madess 27814 oldssmade 27815 oldss 27816 lrold 27835 structiedg0val 28993 snstriedgval 29009 rgrx0nd 29566 vsfval 30603 dmadjrnb 31876 hmdmadj 31910 rdgprc0 35806 fullfunfv 35960 linedegen 36156 bj-inftyexpitaudisj 37218 bj-inftyexpidisj 37223 bj-fvimacnv0 37299 dibvalrel 41181 dicvalrelN 41203 dihvalrel 41297 itgocn 43176 fpwfvss 43424 r1rankcld 44243 grur1cld 44244 uz0 45429 climfveq 45686 climfveqf 45697 afv2ndeffv0 47270 fvmptrabdm 47303 fvconstr 48872 fvconstrn0 48873 fvconstr2 48874 fvconst0ci 48901 fvconstdomi 48902 ipolub00 49003 oppfrcl 49139 initopropdlemlem 49250 initopropd 49254 termopropd 49255 zeroopropd 49256 fucofvalne 49336 |
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