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Mirrors > Home > MPE Home > Th. List > ss0 | Structured version Visualization version GIF version |
Description: Any subset of the empty set is empty. Theorem 5 of [Suppes] p. 23. (Contributed by NM, 13-Aug-1994.) |
Ref | Expression |
---|---|
ss0 | ⊢ (𝐴 ⊆ ∅ → 𝐴 = ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ss0b 3973 | . 2 ⊢ (𝐴 ⊆ ∅ ↔ 𝐴 = ∅) | |
2 | 1 | biimpi 206 | 1 ⊢ (𝐴 ⊆ ∅ → 𝐴 = ∅) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1483 ⊆ wss 3574 ∅c0 3915 |
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-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-v 3202 df-dif 3577 df-in 3581 df-ss 3588 df-nul 3916 |
This theorem is referenced by: sseq0 3975 0dif 3977 eq0rdv 3979 ssdisj 4026 ssdisjOLD 4027 disjpss 4028 dfopif 4399 iunxdif3 4606 fr0 5093 poirr2 5520 sofld 5581 f00 6087 tfindsg 7060 findsg 7093 frxp 7287 map0b 7896 sbthlem7 8076 phplem2 8140 fi0 8326 cantnflem1 8586 rankeq0b 8723 grur1a 9641 ixxdisj 12190 icodisj 12297 ioodisj 12302 uzdisj 12413 nn0disj 12455 hashf1lem2 13240 swrd0 13434 xptrrel 13719 sumz 14453 sumss 14455 fsum2dlem 14501 prod1 14674 prodss 14677 fprodss 14678 fprod2dlem 14710 cntzval 17754 symgbas 17800 oppglsm 18057 efgval 18130 islss 18935 00lss 18942 mplsubglem 19434 ntrcls0 20880 neindisj2 20927 hauscmplem 21209 fbdmn0 21638 fbncp 21643 opnfbas 21646 fbasfip 21672 fbunfip 21673 fgcl 21682 supfil 21699 ufinffr 21733 alexsubALTlem2 21852 metnrmlem3 22664 itg1addlem4 23466 uc1pval 23899 mon1pval 23901 pserulm 24176 vtxdun 26377 vtxdginducedm1 26439 difres 29413 imadifxp 29414 esumrnmpt2 30130 truae 30306 carsgclctunlem2 30381 derangsn 31152 poimirlem3 33412 ismblfin 33450 opabf 34131 pcl0N 35208 pcl0bN 35209 coeq0i 37316 eldioph2lem2 37324 eldioph4b 37375 ntrk2imkb 38335 ntrk0kbimka 38337 ssin0 39223 iccdifprioo 39742 sumnnodd 39862 sge0split 40626 0setrec 42447 |
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