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Mirrors > Home > MPE Home > Th. List > relen | Structured version Visualization version GIF version |
Description: Equinumerosity is a relation. (Contributed by NM, 28-Mar-1998.) |
Ref | Expression |
---|---|
relen | ⊢ Rel ≈ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-en 7842 | . 2 ⊢ ≈ = {〈𝑥, 𝑦〉 ∣ ∃𝑓 𝑓:𝑥–1-1-onto→𝑦} | |
2 | 1 | relopabi 5167 | 1 ⊢ Rel ≈ |
Colors of variables: wff setvar class |
Syntax hints: ∃wex 1695 Rel wrel 5043 –1-1-onto→wf1o 5803 ≈ cen 7838 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-rab 2905 df-v 3175 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-opab 4644 df-xp 5044 df-rel 5045 df-en 7842 |
This theorem is referenced by: encv 7849 isfi 7865 enssdom 7866 ener 7888 enerOLD 7889 en1uniel 7914 enfixsn 7954 sbthcl 7967 xpen 8008 pwen 8018 php3 8031 f1finf1o 8072 mapfien2 8197 isnum2 8654 inffien 8769 cdaen 8878 cdaenun 8879 cdainflem 8896 cdalepw 8901 infmap2 8923 fin4i 9003 fin4en1 9014 isfin4-3 9020 enfin2i 9026 fin45 9097 axcc3 9143 engch 9329 hargch 9374 hasheni 12998 pmtrfv 17695 frgpcyg 19741 lbslcic 19999 phpreu 32563 ctbnfien 36400 |
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