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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 8988 | . 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 5105 ≈ cen 8928 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-sep 5251 ax-pow 5327 ax-pr 5395 ax-un 7722 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ral 3080 df-rex 3090 df-rab 3418 df-v 3459 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4869 df-br 5106 df-opab 5168 df-id 5547 df-xp 5658 df-rel 5659 df-cnv 5660 df-co 5661 df-dm 5662 df-rn 5663 df-res 5664 df-ima 5665 df-fun 6527 df-fn 6528 df-f 6529 df-f1 6530 df-fo 6531 df-f1o 6532 df-er 8682 df-en 8932 |
| This theorem is referenced by: entr2i 8994 entr3i 8995 entr4i 8996 pm54.43 9975 infxpenlem 9985 unsnen 10525 cfpwsdom 10557 tskinf 10742 inar1 10748 gruina 10791 uzenom 13991 znnen 16258 qnnen 16259 rexpen 16274 rucALT 16276 aleph1re 16291 aleph1irr 16292 unben 16959 ex-chn2 18684 1stcfb 23563 2ndcredom 23568 hauspwdom 23619 met1stc 24639 ovolctb2 25612 ovolfi 25614 ovoliunlem3 25624 uniiccdif 25698 dyadmbl 25720 mbfimaopnlem 25775 aannenlem3 26452 f1ocnt 33057 dmvlsiga 34436 sigapildsys 34469 omssubadd 34607 carsgclctunlem3 34627 pellex 43424 tr3dom 44116 nnfoctb 45626 nnf1oxpnn 45771 ioonct 46111 caragenunicl 47096 rrx2xpreen 49350 aacllem 50430 |
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