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Mirrors > Home > MPE Home > Th. List > 1n0 | Structured version Visualization version Unicode version |
Description: Ordinal one is not equal to ordinal zero. (Contributed by NM, 26-Dec-2004.) |
Ref | Expression |
---|---|
1n0 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df1o2 7572 | . 2 | |
2 | 0ex 4790 | . . 3 | |
3 | 2 | snnz 4309 | . 2 |
4 | 1, 3 | eqnetri 2864 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wne 2794 c0 3915 csn 4177 c1o 7553 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-nul 4789 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-v 3202 df-dif 3577 df-un 3579 df-nul 3916 df-sn 4178 df-suc 5729 df-1o 7560 |
This theorem is referenced by: xp01disj 7576 map2xp 8130 sdom1 8160 1sdom 8163 unxpdom2 8168 sucxpdom 8169 card1 8794 pm54.43lem 8825 cflim2 9085 isfin4-3 9137 dcomex 9269 pwcfsdom 9405 cfpwsdom 9406 canthp1lem2 9475 wunex2 9560 1pi 9705 xpscfn 16219 xpsc0 16220 xpsc1 16221 xpscfv 16222 xpsfrnel 16223 xpsfrnel2 16225 setcepi 16738 frgpuptinv 18184 frgpup3lem 18190 frgpnabllem1 18276 dmdprdpr 18448 dprdpr 18449 coe1mul2lem1 19637 2ndcdisj 21259 xpstopnlem1 21612 bnj906 31000 sltval2 31809 nosgnn0 31811 sltintdifex 31814 sltres 31815 sltsolem1 31826 nosepnelem 31830 rankeq1o 32278 onint1 32448 bj-disjsn01 32937 bj-0nel1 32940 bj-1nel0 32941 bj-pr21val 33001 bj-pr22val 33007 finxp1o 33229 finxp2o 33236 wepwsolem 37612 clsk3nimkb 38338 clsk1indlem4 38342 clsk1indlem1 38343 |
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