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| Description: Equinumerosity relation. Compare Definition of [Enderton] p. 129. |
| Ref | Expression |
|---|---|
| bren.1 |
|
| Ref | Expression |
|---|---|
| bren |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bren.1 |
. 2
| |
| 2 | breng 4516 |
. 2
| |
| 3 | 1, 2 | ax-mp 7 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: domen 4520 ener 4551 en0 4564 ensn1 4565 en1 4567 ac6sfi 4591 canth2 4629 mapen 4638 ssenen 4651 phplem4 4658 php3 4662 ssfi 4683 unfilem3 4696 unifi 4701 fiint 4703 fodomfi 4709 numth2 4931 ruc 7761 infxpidmlem10 7773 infxpidmlem12 7775 infmap2lem1 7791 eqindhome 11047 finsschain 11425 fbssint 11626 fcluscomplem 11732 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 998 ax-gen 999 ax-8 1000 ax-10 1002 ax-11 1003 ax-12 1004 ax-13 1005 ax-14 1006 ax-17 1007 ax-4 1009 ax-5o 1011 ax-6o 1014 ax-9o 1159 ax-10o 1177 ax-16 1247 ax-11o 1255 ax-ext 1500 ax-sep 2777 ax-pow 2818 ax-pr 2855 ax-un 3089 |
| This theorem depends on definitions: df-bi 145 df-or 222 df-an 223 df-ex 1017 df-sb 1209 df-eu 1421 df-mo 1422 df-clab 1506 df-cleq 1511 df-clel 1514 df-ne 1630 df-v 1858 df-dif 2101 df-un 2102 df-in 2103 df-ss 2105 df-nul 2333 df-pw 2459 df-sn 2470 df-pr 2471 df-op 2474 df-uni 2570 df-br 2693 df-opab 2741 df-xp 3265 df-rel 3266 df-cnv 3267 df-dm 3269 df-rn 3270 df-fn 3274 df-f 3275 df-f1 3276 df-fo 3277 df-f1o 3278 df-en 4509 |