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Mirrors > Home > MPE Home > Th. List > 1onn | Structured version Visualization version GIF version |
Description: One is a natural number. (Contributed by NM, 29-Oct-1995.) |
Ref | Expression |
---|---|
1onn | ⊢ 1o ∈ ω |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-1o 8104 | . 2 ⊢ 1o = suc ∅ | |
2 | peano1 7603 | . . 3 ⊢ ∅ ∈ ω | |
3 | peano2 7604 | . . 3 ⊢ (∅ ∈ ω → suc ∅ ∈ ω) | |
4 | 2, 3 | ax-mp 5 | . 2 ⊢ suc ∅ ∈ ω |
5 | 1, 4 | eqeltri 2911 | 1 ⊢ 1o ∈ ω |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2114 ∅c0 4293 suc csuc 6195 ωcom 7582 1oc1o 8097 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pr 5332 ax-un 7463 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-sbc 3775 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-br 5069 df-opab 5131 df-tr 5175 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-we 5518 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-om 7583 df-1o 8104 |
This theorem is referenced by: 2onn 8268 1one2o 8271 oaabs2 8274 omabs 8276 nnm2 8278 nnneo 8280 nneob 8281 snfi 8596 snnen2o 8709 1sdom2 8719 1sdom 8723 unxpdom2 8728 en1eqsn 8750 en2 8756 pwfi 8821 wofib 9011 oancom 9116 cnfcom3clem 9170 djurf1o 9344 card1 9399 pm54.43lem 9430 en2eleq 9436 en2other2 9437 infxpenlem 9441 infxpenc2lem1 9447 sdom2en01 9726 cfpwsdom 10008 canthp1lem2 10077 gchdju1 10080 pwxpndom2 10089 pwdjundom 10091 1pi 10307 1lt2pi 10329 indpi 10331 hash2 13769 hash1snb 13783 fnpr2o 16832 fvpr1o 16835 f1otrspeq 18577 pmtrf 18585 pmtrmvd 18586 pmtrfinv 18591 lt6abl 19017 isnzr2 20038 vr1cl 20387 ply1coe 20466 frgpcyg 20722 isppw 25693 bnj906 32204 sat1el2xp 32628 satfv1fvfmla1 32672 satefvfmla1 32674 ex-sategoelelomsuc 32675 ex-sategoelel12 32676 finxpreclem1 34672 finxpreclem2 34673 finxp1o 34675 finxpreclem4 34677 finxp2o 34682 domalom 34687 |
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