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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 8977 | . 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 5110 ≈ cen 8918 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-sep 5254 ax-nul 5264 ax-pow 5323 ax-pr 5390 ax-un 7714 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ral 3046 df-rex 3055 df-rab 3409 df-v 3452 df-dif 3920 df-un 3922 df-in 3924 df-ss 3934 df-nul 4300 df-if 4492 df-pw 4568 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4875 df-br 5111 df-opab 5173 df-id 5536 df-xp 5647 df-rel 5648 df-cnv 5649 df-co 5650 df-dm 5651 df-rn 5652 df-res 5653 df-ima 5654 df-fun 6516 df-fn 6517 df-f 6518 df-f1 6519 df-fo 6520 df-f1o 6521 df-er 8674 df-en 8922 |
| This theorem is referenced by: entr2i 8983 entr3i 8984 entr4i 8985 pm54.43 9961 infxpenlem 9973 unsnen 10513 cfpwsdom 10544 tskinf 10729 inar1 10735 gruina 10778 uzenom 13936 znnen 16187 qnnen 16188 rexpen 16203 rucALT 16205 aleph1re 16220 aleph1irr 16221 unben 16887 1stcfb 23339 2ndcredom 23344 hauspwdom 23395 met1stc 24416 ovolctb2 25400 ovolfi 25402 ovoliunlem3 25412 uniiccdif 25486 dyadmbl 25508 mbfimaopnlem 25563 aannenlem3 26245 f1ocnt 32732 dmvlsiga 34126 sigapildsys 34159 omssubadd 34298 carsgclctunlem3 34318 pellex 42830 tr3dom 43524 nnfoctb 45049 nnf1oxpnn 45196 ioonct 45542 caragenunicl 46529 rrx2xpreen 48712 aacllem 49794 |
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