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Mirrors > Home > MPE Home > Th. List > isnum2 | Unicode version |
Description: A way to express well-orderability without bound or distinct variables. (Contributed by Stefan O'Rear, 28-Feb-2015.) (Revised by Mario Carneiro, 27-Apr-2015.) |
Ref | Expression |
---|---|
isnum2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cardf2 8345 | . . . 4 | |
2 | 1 | fdmi 5741 | . . 3 |
3 | 2 | eleq2i 2535 | . 2 |
4 | relen 7541 | . . . . 5 | |
5 | 4 | brrelex2i 5046 | . . . 4 |
6 | 5 | rexlimivw 2946 | . . 3 |
7 | breq2 4456 | . . . 4 | |
8 | 7 | rexbidv 2968 | . . 3 |
9 | 6, 8 | elab3 3253 | . 2 |
10 | 3, 9 | bitri 249 | 1 |
Colors of variables: wff setvar class |
Syntax hints: <-> wb 184 = wceq 1395
e. wcel 1818 { cab 2442 E. wrex 2808
cvv 3109
class class class wbr 4452 con0 4883 dom cdm 5004 cen 7533 ccrd 8337 |
This theorem is referenced by: isnumi 8348 ennum 8349 xpnum 8353 cardval3 8354 dfac10c 8539 isfin7-2 8797 numth2 8872 inawinalem 9088 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1618 ax-4 1631 ax-5 1704 ax-6 1747 ax-7 1790 ax-8 1820 ax-9 1822 ax-10 1837 ax-11 1842 ax-12 1854 ax-13 1999 ax-ext 2435 ax-sep 4573 ax-nul 4581 ax-pr 4691 ax-un 6592 |
This theorem depends on definitions: df-bi 185 df-or 370 df-an 371 df-3or 974 df-3an 975 df-tru 1398 df-ex 1613 df-nf 1617 df-sb 1740 df-eu 2286 df-mo 2287 df-clab 2443 df-cleq 2449 df-clel 2452 df-nfc 2607 df-ne 2654 df-ral 2812 df-rex 2813 df-rab 2816 df-v 3111 df-sbc 3328 df-dif 3478 df-un 3480 df-in 3482 df-ss 3489 df-pss 3491 df-nul 3785 df-if 3942 df-sn 4030 df-pr 4032 df-tp 4034 df-op 4036 df-uni 4250 df-int 4287 df-br 4453 df-opab 4511 df-mpt 4512 df-tr 4546 df-eprel 4796 df-id 4800 df-po 4805 df-so 4806 df-fr 4843 df-we 4845 df-ord 4886 df-on 4887 df-xp 5010 df-rel 5011 df-cnv 5012 df-co 5013 df-dm 5014 df-rn 5015 df-res 5016 df-ima 5017 df-fun 5595 df-fn 5596 df-f 5597 df-en 7537 df-card 8341 |
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