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| Description: Transitivity of equinumerosity. Theorem 3 of [Suppes] p. 92. |
| Ref | Expression |
|---|---|
| entrt |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relen 4360 |
. 2
| |
| 2 | visset 1809 |
. . 3
| |
| 3 | visset 1809 |
. . 3
| |
| 4 | visset 1809 |
. . 3
| |
| 5 | ener 4397 |
. . 3
| |
| 6 | 2, 3, 4, 5 | ertr 4264 |
. 2
|
| 7 | 2 | enref 4378 |
. 2
|
| 8 | 1, 6, 7 | vtoclrbr 3207 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: entr 4403 en2sn 4418 sdomdomtr 4455 ensdomtr 4457 domsdomtr 4462 enen1 4463 enen2 4464 xpen 4474 ssenen 4490 phplem4 4497 php3 4501 isfinite1 4516 ssfi 4521 isfinite2 4529 unfi 4534 pm54.43 4552 karden 4706 oncard 4809 carden 4811 unbenlem 7455 unben 7456 infxpidmlem1 7503 infxpidmlem12 7514 infcda 7518 infxp 7523 infmap2 7531 alephadd 7532 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 960 ax-gen 961 ax-8 962 ax-9 963 ax-10 964 ax-11 965 ax-12 966 ax-13 967 ax-14 968 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 ax-rep 2688 ax-sep 2698 ax-pow 2737 ax-pr 2774 ax-un 2861 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 776 df-ex 979 df-sb 1170 df-eu 1380 df-mo 1381 df-clab 1462 df-cleq 1467 df-clel 1470 df-ne 1584 df-rex 1647 df-v 1808 df-dif 2045 df-un 2046 df-in 2047 df-ss 2049 df-nul 2277 df-pw 2398 df-sn 2408 df-pr 2409 df-op 2412 df-uni 2499 df-br 2615 df-opab 2662 df-id 2830 df-xp 3179 df-rel 3180 df-cnv 3181 df-co 3182 df-dm 3183 df-rn 3184 df-res 3185 df-ima 3186 df-fun 3187 df-fn 3188 df-f 3189 df-f1 3190 df-fo 3191 df-f1o 3192 df-er 4251 df-en 4357 |