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Mirrors > Home > MPE Home > Th. List > difid | Structured version Visualization version GIF version |
Description: The difference between a class and itself is the empty set. Proposition 5.15 of [TakeutiZaring] p. 20. Also Theorem 32 of [Suppes] p. 28. (Contributed by NM, 22-Apr-2004.) |
Ref | Expression |
---|---|
difid | ⊢ (𝐴 ∖ 𝐴) = ∅ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssid 3624 | . 2 ⊢ 𝐴 ⊆ 𝐴 | |
2 | ssdif0 3942 | . 2 ⊢ (𝐴 ⊆ 𝐴 ↔ (𝐴 ∖ 𝐴) = ∅) | |
3 | 1, 2 | mpbi 220 | 1 ⊢ (𝐴 ∖ 𝐴) = ∅ |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1483 ∖ cdif 3571 ⊆ 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: dif0 3950 difun2 4048 diftpsn3 4332 diftpsn3OLD 4333 symdifid 4599 difxp1 5559 difxp2 5560 2oconcl 7583 oev2 7603 fin1a2lem13 9234 ruclem13 14971 strle1 15973 efgi1 18134 frgpuptinv 18184 gsumdifsnd 18360 dprdsn 18435 ablfac1eulem 18471 fctop 20808 cctop 20810 topcld 20839 indiscld 20895 mretopd 20896 restcld 20976 conndisj 21219 csdfil 21698 ufinffr 21733 prdsxmslem2 22334 bcth3 23128 voliunlem3 23320 uhgr0vb 25967 uhgr0 25968 nbgr1vtx 26254 uvtxa01vtx0 26297 cplgr1v 26326 frgr1v 27135 1vwmgr 27140 difres 29413 imadifxp 29414 difico 29545 0elsiga 30177 prsiga 30194 fiunelcarsg 30378 sibf0 30396 probun 30481 ballotlemfp1 30553 onint1 32448 poimirlem22 33431 poimirlem30 33439 zrdivrng 33752 ntrk0kbimka 38337 clsk3nimkb 38338 ntrclscls00 38364 ntrclskb 38367 ntrneicls11 38388 compne 38643 compneOLD 38644 fzdifsuc2 39525 dvmptfprodlem 40159 fouriercn 40449 prsal 40538 caragenuncllem 40726 carageniuncllem1 40735 caratheodorylem1 40740 gsumdifsndf 42144 |
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