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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 8947 | . 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 5079 ≈ cen 8887 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2712 ax-sep 5225 ax-pow 5301 ax-pr 5369 ax-un 7685 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ral 3055 df-rex 3065 df-rab 3393 df-v 3434 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4269 df-if 4462 df-pw 4538 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4846 df-br 5080 df-opab 5142 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-er 8640 df-en 8891 |
| This theorem is referenced by: entr2i 8953 entr3i 8954 entr4i 8955 pm54.43 9923 infxpenlem 9933 unsnen 10473 cfpwsdom 10505 tskinf 10690 inar1 10696 gruina 10739 uzenom 13924 znnen 16177 qnnen 16178 rexpen 16193 rucALT 16195 aleph1re 16210 aleph1irr 16211 unben 16878 ex-chn2 18602 1stcfb 23435 2ndcredom 23440 hauspwdom 23491 met1stc 24511 ovolctb2 25484 ovolfi 25486 ovoliunlem3 25496 uniiccdif 25570 dyadmbl 25592 mbfimaopnlem 25647 aannenlem3 26321 f1ocnt 32899 dmvlsiga 34320 sigapildsys 34353 omssubadd 34491 carsgclctunlem3 34511 pellex 43287 tr3dom 43979 nnfoctb 45503 nnf1oxpnn 45649 ioonct 45989 caragenunicl 46974 rrx2xpreen 49217 aacllem 50298 |
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