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| Description: The set of natural numbers is unbounded above. Theorem I.28 of [Apostol] p. 26. |
| Ref | Expression |
|---|---|
| nnunb |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pm3.24 657 |
. . . 4
| |
| 2 | oprex 3974 |
. . . . . . . . . . . . 13
| |
| 3 | eleq1 1531 |
. . . . . . . . . . . . . 14
| |
| 4 | breq1 2617 |
. . . . . . . . . . . . . . 15
| |
| 5 | breq1 2617 |
. . . . . . . . . . . . . . . 16
| |
| 6 | 5 | rexbidv 1661 |
. . . . . . . . . . . . . . 15
|
| 7 | 4, 6 | imbi12d 625 |
. . . . . . . . . . . . . 14
|
| 8 | 3, 7 | imbi12d 625 |
. . . . . . . . . . . . 13
|
| 9 | 2, 8 | cla4v 1864 |
. . . . . . . . . . . 12
|
| 10 | ltm1t 5779 |
. . . . . . . . . . . 12
| |
| 11 | 9, 10 | syl7 23 |
. . . . . . . . . . 11
|
| 12 | peano2rem 5422 |
. . . . . . . . . . 11
| |
| 13 | 11, 12 | syl5 21 |
. . . . . . . . . 10
|
| 14 | 13 | pm2.43d 65 |
. . . . . . . . 9
|
| 15 | df-rex 1647 |
. . . . . . . . 9
| |
| 16 | 14, 15 | syl6ib 212 |
. . . . . . . 8
|
| 17 | 16 | com12 11 |
. . . . . . 7
|
| 18 | 1re 5415 |
. . . . . . . . . . . 12
| |
| 19 | ltsubaddt 5609 |
. . . . . . . . . . . 12
| |
| 20 | 18, 19 | mp3an2 902 |
. . . . . . . . . . 11
|
| 21 | nnret 5885 |
. . . . . . . . . . 11
| |
| 22 | 20, 21 | sylan2 451 |
. . . . . . . . . 10
|
| 23 | 22 | pm5.32da 648 |
. . . . . . . . 9
|
| 24 | 23 | exbidv 1277 |
. . . . . . . 8
|
| 25 | oprex 3974 |
. . . . . . . . . . 11
| |
| 26 | eleq1 1531 |
. . . . . . . . . . . 12
| |
| 27 | breq2 2618 |
. . . . . . . . . . . 12
| |
| 28 | 26, 27 | anbi12d 627 |
. . . . . . . . . . 11
|
| 29 | 25, 28 | cla4ev 1865 |
. . . . . . . . . 10
|
| 30 | peano2nn 5891 |
. . . . . . . . . 10
| |
| 31 | 29, 30 | sylan 448 |
. . . . . . . . 9
|
| 32 | 31 | 19.23aiv 1293 |
. . . . . . . 8
|
| 33 | 24, 32 | syl6bi 214 |
. . . . . . 7
|
| 34 | 17, 33 | syld 27 |
. . . . . 6
|
| 35 | df-ral 1646 |
. . . . . 6
| |
| 36 | df-ral 1646 |
. . . . . . . 8
| |
| 37 | alinexa 1040 |
. . . . . . . 8
| |
| 38 | 36, 37 | bitr2 174 |
. . . . . . 7
|
| 39 | 38 | con1bii 220 |
. . . . . 6
|
| 40 | 34, 35, 39 | 3imtr4g 552 |
. . . . 5
|
| 41 | 40 | anim2d 560 |
. . . 4
|
| 42 | 1, 41 | mtoi 107 |
. . 3
|
| 43 | 42 | nrex 1726 |
. 2
|
| 44 | nnssre 5883 |
. . 3
| |
| 45 | 1nn 5890 |
. . . . 5
| |
| 46 | n0i 2281 |
. . . . 5
| |
| 47 | 45, 46 | ax-mp 7 |
. . . 4
|
| 48 | df-ne 1584 |
. . . 4
| |
| 49 | 47, 48 | mpbir 190 |
. . 3
|
| 50 | sup2 6006 |
. . 3
| |
| 51 | 44, 49, 50 | mp3an12 904 |
. 2
|
| 52 | 43, 51 | mto 106 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: arch 6026 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 960 ax-gen 961 ax-8 962 ax-9 963 ax-10 964 ax-11 965 ax-12 966 ax-13 967 ax-14 968 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 ax-rep 2688 ax-sep 2698 ax-nul 2705 ax-pow 2737 ax-pr 2774 ax-un 2861 ax-inf2 4605 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 775 df-3an 776 df-ex 979 df-sb 1170 df-eu 1380 df-mo 1381 df-clab 1462 df-cleq 1467 df-clel 1470 df-ne 1584 df-nel 1585 df-ral 1646 df-rex 1647 df-reu 1648 df-rab 1649 df-v 1808 df-sbc 1938 df-csb 1998 df-dif 2045 df-un 2046 df-in 2047 df-ss 2049 df-pss 2051 df-nul 2277 df-if 2358 df-pw 2398 df-sn 2408 df-pr 2409 df-tp 2411 df-op 2412 df-uni 2499 df-int 2529 df-iun 2563 df-br 2615 df-opab 2662 df-tr 2676 df-eprel 2827 df-id 2830 df-po 2835 df-so 2845 df-fr 2912 df-we 2929 df-ord 2946 df-on 2947 df-lim 2948 df-suc 2949 df-om 3127 df-xp 3179 df-rel 3180 df-cnv 3181 df-co 3182 df-dm 3183 df-rn 3184 df-res 3185 df-ima 3186 df-fun 3187 df-fn 3188 df-f 3189 df-f1 3190 df-fo 3191 df-f1o 3192 df-fv 3193 df-rdg 3923 df-opr 3956 df-oprab 3957 df-1st 4069 df-2nd 4070 df-1o 4123 df-oadd 4125 df-omul 4126 df-er 4251 df-ec 4253 df-qs 4256 df-en 4357 df-dom 4358 df-sdom 4359 df-ni 4980 df-pli 4981 df-mi 4982 df-lti 4983 df-plpq 5015 df-mpq 5016 df-enq 5017 df-nq 5018 df-plq 5019 df-mq 5020 df-rq 5021 df-ltq 5022 df-1q 5023 df-np 5066 df-1p 5067 df-plp 5068 df-mp 5069 df-ltp 5070 df-plpr 5144 df-mpr 5145 df-enr 5146 df-nr 5147 df-plr 5148 df-mr 5149 df-ltr 5150 df-0r 5151 df-1r 5152 df-m1r 5153 df-c 5220 df-0 5221 df-1 5222 df-i 5223 df-r 5224 df-plus 5225 df-mul 5226 df-lt 5227 df-sub 5336 df-neg 5338 df-pnf 5467 df-mnf 5468 df-xr 5469 df-ltxr 5470 df-le 5471 df-n 5881 |