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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 9033 | . 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 5102 ≈ cen 8973 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-pow 5326 ax-pr 5390 ax-un 7751 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-er 8720 df-en 8977 |
| This theorem is used by: entr2i 9039 entr3i 9040 entr4i 9041 pm54.43 10085 infxpenlem 10095 unsnen 10640 cfpwsdom 10672 tskinf 10857 inar1 10863 gruina 10906 uzenom 14110 znnen 16385 qnnen 16386 rexpen 16401 rucALT 16403 aleph1re 16418 aleph1irr 16419 unben 17092 ex-chn2 18817 1stcfb 23768 2ndcredom 23773 hauspwdom 23825 met1stc 24845 ovolctb2 25818 ovolfi 25820 ovoliunlem3 25830 uniiccdif 25904 dyadmbl 25926 mbfimaopnlem 25981 aannenlem3 26662 f1ocnt 33438 dmvlsiga 34807 sigapildsys 34841 carsgclctunlem3 34998 pellex 43935 tr3dom 44622 nnfoctb 46158 nnf1oxpnn 46303 ioonct 46642 caragenunicl 47627 rrx2xpreen 49925 aacllem 51107 |
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