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Mirrors > Home > MPE Home > Th. List > 9pos | Structured version Visualization version GIF version |
Description: The number 9 is positive. (Contributed by NM, 27-May-1999.) |
Ref | Expression |
---|---|
9pos | ⊢ 0 < 9 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 8re 11297 | . . 3 ⊢ 8 ∈ ℝ | |
2 | 1re 10231 | . . 3 ⊢ 1 ∈ ℝ | |
3 | 8pos 11313 | . . 3 ⊢ 0 < 8 | |
4 | 0lt1 10742 | . . 3 ⊢ 0 < 1 | |
5 | 1, 2, 3, 4 | addgt0ii 10762 | . 2 ⊢ 0 < (8 + 1) |
6 | df-9 11278 | . 2 ⊢ 9 = (8 + 1) | |
7 | 5, 6 | breqtrri 4831 | 1 ⊢ 0 < 9 |
Colors of variables: wff setvar class |
Syntax hints: class class class wbr 4804 (class class class)co 6813 0cc0 10128 1c1 10129 + caddc 10131 < clt 10266 8c8 11268 9c9 11269 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1871 ax-4 1886 ax-5 1988 ax-6 2054 ax-7 2090 ax-8 2141 ax-9 2148 ax-10 2168 ax-11 2183 ax-12 2196 ax-13 2391 ax-ext 2740 ax-sep 4933 ax-nul 4941 ax-pow 4992 ax-pr 5055 ax-un 7114 ax-resscn 10185 ax-1cn 10186 ax-icn 10187 ax-addcl 10188 ax-addrcl 10189 ax-mulcl 10190 ax-mulrcl 10191 ax-mulcom 10192 ax-addass 10193 ax-mulass 10194 ax-distr 10195 ax-i2m1 10196 ax-1ne0 10197 ax-1rid 10198 ax-rnegex 10199 ax-rrecex 10200 ax-cnre 10201 ax-pre-lttri 10202 ax-pre-lttrn 10203 ax-pre-ltadd 10204 ax-pre-mulgt0 10205 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1073 df-3an 1074 df-tru 1635 df-ex 1854 df-nf 1859 df-sb 2047 df-eu 2611 df-mo 2612 df-clab 2747 df-cleq 2753 df-clel 2756 df-nfc 2891 df-ne 2933 df-nel 3036 df-ral 3055 df-rex 3056 df-reu 3057 df-rab 3059 df-v 3342 df-sbc 3577 df-csb 3675 df-dif 3718 df-un 3720 df-in 3722 df-ss 3729 df-nul 4059 df-if 4231 df-pw 4304 df-sn 4322 df-pr 4324 df-op 4328 df-uni 4589 df-br 4805 df-opab 4865 df-mpt 4882 df-id 5174 df-po 5187 df-so 5188 df-xp 5272 df-rel 5273 df-cnv 5274 df-co 5275 df-dm 5276 df-rn 5277 df-res 5278 df-ima 5279 df-iota 6012 df-fun 6051 df-fn 6052 df-f 6053 df-f1 6054 df-fo 6055 df-f1o 6056 df-fv 6057 df-riota 6774 df-ov 6816 df-oprab 6817 df-mpt2 6818 df-er 7911 df-en 8122 df-dom 8123 df-sdom 8124 df-pnf 10268 df-mnf 10269 df-xr 10270 df-ltxr 10271 df-le 10272 df-sub 10460 df-neg 10461 df-2 11271 df-3 11272 df-4 11273 df-5 11274 df-6 11275 df-7 11276 df-8 11277 df-9 11278 |
This theorem is referenced by: 10posOLD 11315 0.999... 14811 0.999...OLD 14812 cos2bnd 15117 sincos2sgn 15123 log2tlbnd 24871 bposlem4 25211 bposlem5 25212 hgt750lem 31038 257prm 41983 31prm 42022 |
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