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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 2482 | . . . . 5 ⊢ (∃!𝑥 𝐴𝐹𝑥 → ∃𝑥 𝐴𝐹𝑥) | |
2 | eldmg 5241 | . . . . 5 ⊢ (𝐴 ∈ V → (𝐴 ∈ dom 𝐹 ↔ ∃𝑥 𝐴𝐹𝑥)) | |
3 | 1, 2 | syl5ibr 235 | . . . 4 ⊢ (𝐴 ∈ V → (∃!𝑥 𝐴𝐹𝑥 → 𝐴 ∈ dom 𝐹)) |
4 | 3 | con3d 147 | . . 3 ⊢ (𝐴 ∈ V → (¬ 𝐴 ∈ dom 𝐹 → ¬ ∃!𝑥 𝐴𝐹𝑥)) |
5 | tz6.12-2 6094 | . . 3 ⊢ (¬ ∃!𝑥 𝐴𝐹𝑥 → (𝐹‘𝐴) = ∅) | |
6 | 4, 5 | syl6 34 | . 2 ⊢ (𝐴 ∈ V → (¬ 𝐴 ∈ dom 𝐹 → (𝐹‘𝐴) = ∅)) |
7 | fvprc 6097 | . . 3 ⊢ (¬ 𝐴 ∈ V → (𝐹‘𝐴) = ∅) | |
8 | 7 | a1d 25 | . 2 ⊢ (¬ 𝐴 ∈ V → (¬ 𝐴 ∈ dom 𝐹 → (𝐹‘𝐴) = ∅)) |
9 | 6, 8 | pm2.61i 175 | 1 ⊢ (¬ 𝐴 ∈ dom 𝐹 → (𝐹‘𝐴) = ∅) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 = wceq 1475 ∃wex 1695 ∈ wcel 1977 ∃!weu 2458 Vcvv 3173 ∅c0 3874 class class class wbr 4583 dom cdm 5038 ‘cfv 5804 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-nul 4717 ax-pow 4769 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-dm 5048 df-iota 5768 df-fv 5812 |
This theorem is referenced by: ndmfvrcl 6129 elfvdm 6130 nfvres 6134 fvfundmfvn0 6136 0fv 6137 funfv 6175 fvun1 6179 fvco4i 6186 fvmpti 6190 mptrcl 6198 fvmptss 6201 fvmptex 6203 fvmptnf 6210 fvmptss2 6212 elfvmptrab1 6213 fvopab4ndm 6215 f0cli 6278 funiunfv 6410 ovprc 6581 oprssdm 6713 nssdmovg 6714 ndmovg 6715 1st2val 7085 2nd2val 7086 brovpreldm 7141 curry1val 7157 curry2val 7161 smofvon2 7340 rdgsucmptnf 7412 frsucmptn 7421 brwitnlem 7474 undifixp 7830 r1tr 8522 rankvaln 8545 cardidm 8668 carden2a 8675 carden2b 8676 carddomi2 8679 sdomsdomcardi 8680 pm54.43lem 8708 alephcard 8776 alephnbtwn 8777 alephgeom 8788 cfub 8954 cardcf 8957 cflecard 8958 cfle 8959 cflim2 8968 cfidm 8980 itunisuc 9124 itunitc1 9125 ituniiun 9127 alephadd 9278 alephreg 9283 pwcfsdom 9284 cfpwsdom 9285 adderpq 9657 mulerpq 9658 uzssz 11583 ltweuz 12622 wrdsymb0 13194 lsw0 13205 swrd00 13270 swrd0 13286 sumz 14300 sumss 14302 sumnul 14333 prod1 14513 prodss 14516 divsfval 16030 cidpropd 16193 arwval 16516 coafval 16537 lubval 16807 glbval 16820 joinval 16828 meetval 16842 gsumpropd2lem 17096 mpfrcl 19339 iscnp2 20853 setsmstopn 22093 tngtopn 22264 pcofval 22618 dvbsss 23472 perfdvf 23473 dchrrcl 24765 eleenn 25576 structiedg0val 25699 snstriedgval 25713 clwwlknprop 26300 2wlkonot3v 26402 2spthonot3v 26403 vsfval 26872 dmadjrnb 28149 hmdmadj 28183 rdgprc0 30943 soseq 30995 nofv 31054 sltres 31061 noseponlem 31065 bdayelon 31079 fvnobday 31081 fullfunfv 31224 linedegen 31420 bj-inftyexpidisj 32274 dibvalrel 35470 dicvalrelN 35492 dihvalrel 35586 itgocn 36753 climfveq 38736 pfx00 40247 pfx0 40248 rgrx0nd 40794 setrec2lem1 42239 |
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