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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 4366 |
. 2
| |
| 3 | 1, 2 | ax-mp 7 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: domen 4370 ener 4400 en0 4413 ensn1 4414 en1 4416 canth2 4473 mapen 4480 ssenen 4493 phplem4 4500 php3 4504 ssfi 4524 unfilem3 4535 unifi 4541 fiint 4543 fodomfi 4549 numth2 4768 ruc 7509 infxpidmlem10 7521 infxpidmlem12 7523 infmap2lem1 7539 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 961 ax-gen 962 ax-8 963 ax-10 965 ax-11 966 ax-12 967 ax-13 968 ax-14 969 ax-17 970 ax-4 972 ax-5o 974 ax-6o 977 ax-9o 1122 ax-10o 1139 ax-16 1209 ax-11o 1217 ax-ext 1458 ax-sep 2699 ax-pow 2738 ax-pr 2775 ax-un 2862 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 980 df-sb 1171 df-eu 1381 df-mo 1382 df-clab 1463 df-cleq 1468 df-clel 1471 df-ne 1585 df-v 1809 df-dif 2046 df-un 2047 df-in 2048 df-ss 2050 df-nul 2278 df-pw 2399 df-sn 2409 df-pr 2410 df-op 2413 df-uni 2500 df-br 2616 df-opab 2663 df-xp 3180 df-rel 3181 df-cnv 3182 df-dm 3184 df-rn 3185 df-fn 3189 df-f 3190 df-f1 3191 df-fo 3192 df-f1o 3193 df-en 4360 |