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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 8952 | . 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 5100 ≈ cen 8892 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-pow 5312 ax-pr 5379 ax-un 7690 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-id 5527 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-er 8645 df-en 8896 |
| This theorem is referenced by: entr2i 8958 entr3i 8959 entr4i 8960 pm54.43 9925 infxpenlem 9935 unsnen 10475 cfpwsdom 10507 tskinf 10692 inar1 10698 gruina 10741 uzenom 13899 znnen 16149 qnnen 16150 rexpen 16165 rucALT 16167 aleph1re 16182 aleph1irr 16183 unben 16849 ex-chn2 18573 1stcfb 23401 2ndcredom 23406 hauspwdom 23457 met1stc 24477 ovolctb2 25461 ovolfi 25463 ovoliunlem3 25473 uniiccdif 25547 dyadmbl 25569 mbfimaopnlem 25624 aannenlem3 26306 f1ocnt 32890 dmvlsiga 34306 sigapildsys 34339 omssubadd 34477 carsgclctunlem3 34497 pellex 43186 tr3dom 43878 nnfoctb 45402 nnf1oxpnn 45548 ioonct 45891 caragenunicl 46876 rrx2xpreen 49073 aacllem 50154 |
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