| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > enrefg | Structured version Visualization version GIF version | ||
| Description: Equinumerosity is reflexive. Theorem 1 of [Suppes] p. 92. (Contributed by NM, 18-Jun-1998.) (Revised by Mario Carneiro, 26-Apr-2015.) |
| Ref | Expression |
|---|---|
| enrefg | ⊢ (𝐴 ∈ 𝑉 → 𝐴 ≈ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1oi 6813 | . . 3 ⊢ ( I ↾ 𝐴):𝐴–1-1-onto→𝐴 | |
| 2 | f1oen2g 8909 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐴 ∈ 𝑉 ∧ ( I ↾ 𝐴):𝐴–1-1-onto→𝐴) → 𝐴 ≈ 𝐴) | |
| 3 | 1, 2 | mp3an3 1453 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐴 ∈ 𝑉) → 𝐴 ≈ 𝐴) |
| 4 | 3 | anidms 566 | 1 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ≈ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2114 class class class wbr 5099 I cid 5519 ↾ cres 5627 –1-1-onto→wf1o 6492 ≈ cen 8884 |
| 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-ext 2709 ax-sep 5242 ax-nul 5252 ax-pow 5311 ax-pr 5378 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-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ral 3053 df-rex 3062 df-rab 3401 df-v 3443 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-br 5100 df-opab 5162 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-en 8888 |
| This theorem is referenced by: enref 8926 eqeng 8927 domrefg 8928 difsnen 8991 sdomirr 9046 mapdom1 9074 mapdom2 9080 rneqdmfinf1o 9237 infdifsn 9570 infdiffi 9571 onenon 9865 cardonle 9873 dju1en 10086 xpdjuen 10094 mapdjuen 10095 onadju 10108 nnadju 10112 ssfin4 10224 canthp1lem1 10567 gchhar 10594 hashfac 14385 mreexexlem3d 17573 cyggenod 19817 mdetunilem8 22567 frlmpwfi 43376 fiuneneq 43470 enrelmap 44274 |
| Copyright terms: Public domain | W3C validator |