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| Mirrors > Home > ILE Home > Th. List > 0lt1 | GIF version | ||
| Description: 0 is less than 1. Theorem I.21 of [Apostol] p. 20. Part of definition 11.2.7(vi) of [HoTT], p. (varies). (Contributed by NM, 17-Jan-1997.) |
| Ref | Expression |
|---|---|
| 0lt1 | ⊢ 0 < 1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-0lt1 8291 | . 2 ⊢ 0 <ℝ 1 | |
| 2 | 0re 8332 | . . 3 ⊢ 0 ∈ ℝ | |
| 3 | 1re 8331 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | ltxrlt 8397 | . . 3 ⊢ ((0 ∈ ℝ ∧ 1 ∈ ℝ) → (0 < 1 ↔ 0 <ℝ 1)) | |
| 5 | 2, 3, 4 | mp2an 430 | . 2 ⊢ (0 < 1 ↔ 0 <ℝ 1) |
| 6 | 1, 5 | mpbir 146 | 1 ⊢ 0 < 1 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ↔ wb 105 ∈ wcel 2209 class class class wbr 4131 ℝcr 8184 0cc0 8185 1c1 8186 <ℝ cltrr 8189 < clt 8366 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-cnex 8276 ax-resscn 8277 ax-1re 8279 ax-addrcl 8282 ax-0lt1 8291 ax-rnegex 8294 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4132 df-opab 4194 df-xp 4782 df-pnf 8368 df-mnf 8369 df-ltxr 8371 |
| This theorem is used by: ine0 8728 0le1 8816 inelr 8920 1ap0 8926 eqneg 9070 ltp1 9182 ltm1 9184 recgt0 9188 mulgt1 9201 reclt1 9234 recgt1 9235 recgt1i 9236 recp1lt1 9237 recreclt 9238 sup3exmid 9295 nnge1 9336 nngt0 9338 0nnn 9340 nnrecgt0 9351 0ne1 9380 2pos 9404 3pos 9407 4pos 9410 5pos 9413 6pos 9414 7pos 9415 8pos 9416 9pos 9417 neg1lt0 9421 halflt1 9533 nn0p1gt0 9603 elnnnn0c 9619 elnnz1 9676 recnz 9749 1rp 10074 divlt1lt 10141 divle1le 10142 ledivge1le 10143 nnledivrp 10183 fz10 10466 fzpreddisj 10494 elfz1b 10513 modqfrac 10794 expgt1 11034 ltexp2a 11048 leexp2a 11049 resq01 11115 expnbnd 11121 expnlbnd 11122 expnlbnd2 11123 nn0ltexp2 11168 expcanlem 11174 expcan 11175 bcn1 11217 ssenneg 11301 s2fv0g 11580 resqrexlem1arp 11792 mulcn2 12102 reccn2ap 12103 georeclim 12304 geoisumr 12309 cos1bnd 12550 sin01gt0 12553 sincos1sgn 12556 p1modz1 12585 nnoddm1d2 12701 dvdsnprmd 12927 divdenle 13001 43prm 13264 ballotfilemi1 13302 ballotfilemic 13307 plendxnocndx 13626 znidomb 15101 mopnex 15748 ivthdichlem 15894 reeff1olem 16014 cos02pilt1 16096 rplogcl 16126 cxplt 16168 cxple 16169 ltexp2 16194 pellexlem2 16247 ppiqltx 16298 mersenne 16314 perfectlem2 16317 apdiff 17321 |
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