| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 8925 | . 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 5091 ≈ cen 8866 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5234 ax-nul 5244 ax-pow 5303 ax-pr 5370 ax-un 7668 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4476 df-pw 4552 df-sn 4577 df-pr 4579 df-op 4583 df-uni 4860 df-br 5092 df-opab 5154 df-id 5511 df-xp 5622 df-rel 5623 df-cnv 5624 df-co 5625 df-dm 5626 df-rn 5627 df-res 5628 df-ima 5629 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 df-er 8622 df-en 8870 |
| This theorem is referenced by: entr2i 8931 entr3i 8932 entr4i 8933 pm54.43 9891 infxpenlem 9901 unsnen 10441 cfpwsdom 10472 tskinf 10657 inar1 10663 gruina 10706 uzenom 13868 znnen 16118 qnnen 16119 rexpen 16134 rucALT 16136 aleph1re 16151 aleph1irr 16152 unben 16818 ex-chn2 18541 1stcfb 23358 2ndcredom 23363 hauspwdom 23414 met1stc 24434 ovolctb2 25418 ovolfi 25420 ovoliunlem3 25430 uniiccdif 25504 dyadmbl 25526 mbfimaopnlem 25581 aannenlem3 26263 f1ocnt 32777 dmvlsiga 34137 sigapildsys 34170 omssubadd 34308 carsgclctunlem3 34328 pellex 42867 tr3dom 43560 nnfoctb 45084 nnf1oxpnn 45231 ioonct 45576 caragenunicl 46561 rrx2xpreen 48750 aacllem 49832 |
| Copyright terms: Public domain | W3C validator |