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Mirrors > Home > MPE Home > Th. List > nnadjuALT | Structured version Visualization version GIF version |
Description: Shorter proof of nnadju 10191 using ax-rep 5278. (Contributed by Paul Chapman, 11-Apr-2009.) (Revised by Mario Carneiro, 6-Feb-2013.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
nnadjuALT | β’ ((π΄ β Ο β§ π΅ β Ο) β (cardβ(π΄ β π΅)) = (π΄ +o π΅)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnon 7857 | . . . 4 β’ (π΄ β Ο β π΄ β On) | |
2 | nnon 7857 | . . . 4 β’ (π΅ β Ο β π΅ β On) | |
3 | onadju 10187 | . . . 4 β’ ((π΄ β On β§ π΅ β On) β (π΄ +o π΅) β (π΄ β π΅)) | |
4 | 1, 2, 3 | syl2an 595 | . . 3 β’ ((π΄ β Ο β§ π΅ β Ο) β (π΄ +o π΅) β (π΄ β π΅)) |
5 | carden2b 9961 | . . 3 β’ ((π΄ +o π΅) β (π΄ β π΅) β (cardβ(π΄ +o π΅)) = (cardβ(π΄ β π΅))) | |
6 | 4, 5 | syl 17 | . 2 β’ ((π΄ β Ο β§ π΅ β Ο) β (cardβ(π΄ +o π΅)) = (cardβ(π΄ β π΅))) |
7 | nnacl 8609 | . . 3 β’ ((π΄ β Ο β§ π΅ β Ο) β (π΄ +o π΅) β Ο) | |
8 | cardnn 9957 | . . 3 β’ ((π΄ +o π΅) β Ο β (cardβ(π΄ +o π΅)) = (π΄ +o π΅)) | |
9 | 7, 8 | syl 17 | . 2 β’ ((π΄ β Ο β§ π΅ β Ο) β (cardβ(π΄ +o π΅)) = (π΄ +o π΅)) |
10 | 6, 9 | eqtr3d 2768 | 1 β’ ((π΄ β Ο β§ π΅ β Ο) β (cardβ(π΄ β π΅)) = (π΄ +o π΅)) |
Colors of variables: wff setvar class |
Syntax hints: β wi 4 β§ wa 395 = wceq 1533 β wcel 2098 class class class wbr 5141 Oncon0 6357 βcfv 6536 (class class class)co 7404 Οcom 7851 +o coa 8461 β cen 8935 β cdju 9892 cardccrd 9929 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7721 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6293 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6488 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7407 df-oprab 7408 df-mpo 7409 df-om 7852 df-1st 7971 df-2nd 7972 df-frecs 8264 df-wrecs 8295 df-recs 8369 df-rdg 8408 df-1o 8464 df-oadd 8468 df-er 8702 df-en 8939 df-dom 8940 df-sdom 8941 df-fin 8942 df-dju 9895 df-card 9933 |
This theorem is referenced by: (None) |
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