| 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 9014 | . 2 ⊢ (𝐴 ≈ 𝐵 → 𝐵 ≈ 𝐴) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ 𝐵 ≈ 𝐴 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: class class class wbr 5103 ≈ cen 8954 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-pow 5327 ax-pr 5391 ax-un 7740 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-er 8701 df-en 8958 |
| This theorem is used by: entr2i 9020 entr3i 9021 entr4i 9022 pm54.43 10063 infxpenlem 10073 unsnen 10618 cfpwsdom 10650 tskinf 10835 inar1 10841 gruina 10884 uzenom 14087 znnen 16360 qnnen 16361 rexpen 16376 rucALT 16378 aleph1re 16393 aleph1irr 16394 unben 17067 ex-chn2 18792 1stcfb 23743 2ndcredom 23748 hauspwdom 23800 met1stc 24820 ovolctb2 25793 ovolfi 25795 ovoliunlem3 25805 uniiccdif 25879 dyadmbl 25901 mbfimaopnlem 25956 aannenlem3 26639 f1ocnt 33374 dmvlsiga 34743 sigapildsys 34777 omssubadd 34915 carsgclctunlem3 34935 pellex 43795 tr3dom 44487 nnfoctb 46008 nnf1oxpnn 46153 ioonct 46493 caragenunicl 47478 rrx2xpreen 49775 aacllem 50883 |
| Copyright terms: Public domain | W3C validator |