| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > entr | GIF version | ||
| Description: Transitivity of equinumerosity. Theorem 3 of [Suppes] p. 92. (Contributed by NM, 9-Jun-1998.) |
| Ref | Expression |
|---|---|
| entr | ⊢ ((𝐴 ≈ 𝐵 ∧ 𝐵 ≈ 𝐶) → 𝐴 ≈ 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ener 6953 | . . . 4 ⊢ ≈ Er V | |
| 2 | 1 | a1i 9 | . . 3 ⊢ (⊤ → ≈ Er V) |
| 3 | 2 | ertr 6717 | . 2 ⊢ (⊤ → ((𝐴 ≈ 𝐵 ∧ 𝐵 ≈ 𝐶) → 𝐴 ≈ 𝐶)) |
| 4 | 3 | mptru 1406 | 1 ⊢ ((𝐴 ≈ 𝐵 ∧ 𝐵 ≈ 𝐶) → 𝐴 ≈ 𝐶) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ⊤wtru 1398 Vcvv 2802 class class class wbr 4088 Er wer 6699 ≈ cen 6907 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-fun 5328 df-fn 5329 df-f 5330 df-f1 5331 df-fo 5332 df-f1o 5333 df-er 6702 df-en 6910 |
| This theorem is referenced by: entri 6960 en2sn 6988 xpsnen2g 7013 enen1 7026 enen2 7027 ssenen 7037 phplem4 7041 snnen2og 7045 php5dom 7049 phplem4on 7054 dif1en 7068 dif1enen 7069 fisbth 7072 diffisn 7082 fidcen 7088 eqsndc 7095 exmidpw2en 7104 unsnfidcex 7112 unsnfidcel 7113 f1finf1o 7146 en1eqsn 7147 endjusym 7295 carden2bex 7394 pm54.43 7395 pr2ne 7397 djuen 7426 djuenun 7427 djuassen 7432 frecfzen2 10690 uzennn 10699 hashunlem 11068 hashxp 11091 1nprm 12691 hashdvds 12798 4sqlem11 12979 unennn 13023 ennnfonelemen 13047 ennnfonelemim 13050 exmidunben 13052 ctinfom 13054 ctinf 13056 umgredgnlp 16009 usgrsizedgen 16070 upgr2wlkdc 16234 pwf1oexmid 16626 nnnninfen 16649 |
| Copyright terms: Public domain | W3C validator |