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| Mirrors > Home > MPE Home > Th. List > ensymi | Structured version Visualization version GIF version | ||
| Description: Symmetry of equinumerosity. Theorem 2 of [Suppes] p. 92. (Contributed by NM, 25-Sep-2004.) |
| Ref | Expression |
|---|---|
| ensymi.2 | ⊢ 𝐴 ≈ 𝐵 |
| Ref | Expression |
|---|---|
| ensymi | ⊢ 𝐵 ≈ 𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ensymi.2 | . 2 ⊢ 𝐴 ≈ 𝐵 | |
| 2 | ensym 9001 | . 2 ⊢ (𝐴 ≈ 𝐵 → 𝐵 ≈ 𝐴) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ 𝐵 ≈ 𝐴 |
| Colors of variables: wff setvar class |
| Syntax hints: class class class wbr 5110 ≈ cen 8941 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-pow 5338 ax-pr 5406 ax-un 7734 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-opab 5175 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-er 8695 df-en 8945 |
| This theorem is referenced by: entr2i 9007 entr3i 9008 entr4i 9009 pm54.43 9988 infxpenlem 9998 unsnen 10538 cfpwsdom 10570 tskinf 10755 inar1 10761 gruina 10804 uzenom 14002 znnen 16269 qnnen 16270 rexpen 16285 rucALT 16287 aleph1re 16302 aleph1irr 16303 unben 16970 ex-chn2 18695 1stcfb 23583 2ndcredom 23588 hauspwdom 23639 met1stc 24659 ovolctb2 25632 ovolfi 25634 ovoliunlem3 25644 uniiccdif 25718 dyadmbl 25740 mbfimaopnlem 25795 aannenlem3 26472 f1ocnt 33123 dmvlsiga 34497 sigapildsys 34530 omssubadd 34668 carsgclctunlem3 34688 pellex 43542 tr3dom 44234 nnfoctb 45748 nnf1oxpnn 45893 ioonct 46233 caragenunicl 47218 rrx2xpreen 49476 aacllem 50578 |
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