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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 8943 | . 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 5086 ≈ cen 8883 |
| 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 5231 ax-pow 5302 ax-pr 5370 ax-un 7682 |
| 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 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-er 8636 df-en 8887 |
| This theorem is referenced by: entr2i 8949 entr3i 8950 entr4i 8951 pm54.43 9916 infxpenlem 9926 unsnen 10466 cfpwsdom 10498 tskinf 10683 inar1 10689 gruina 10732 uzenom 13917 znnen 16170 qnnen 16171 rexpen 16186 rucALT 16188 aleph1re 16203 aleph1irr 16204 unben 16871 ex-chn2 18595 1stcfb 23420 2ndcredom 23425 hauspwdom 23476 met1stc 24496 ovolctb2 25469 ovolfi 25471 ovoliunlem3 25481 uniiccdif 25555 dyadmbl 25577 mbfimaopnlem 25632 aannenlem3 26307 f1ocnt 32888 dmvlsiga 34289 sigapildsys 34322 omssubadd 34460 carsgclctunlem3 34480 pellex 43281 tr3dom 43973 nnfoctb 45497 nnf1oxpnn 45643 ioonct 45985 caragenunicl 46970 rrx2xpreen 49207 aacllem 50288 |
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