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| Mirrors > Home > MPE Home > Th. List > mnflt0 | Structured version Visualization version GIF version | ||
| Description: Minus infinity is less than 0. (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| mnflt0 | ⊢ -∞ < 0 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0re 11238 | . 2 ⊢ 0 ∈ ℝ | |
| 2 | mnflt 13178 | . 2 ⊢ (0 ∈ ℝ → -∞ < 0) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ -∞ < 0 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 class class class wbr 5107 ℝcr 11127 0cc0 11128 -∞cmnf 11269 < clt 11271 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2734 ax-sep 5255 ax-pow 5334 ax-pr 5402 ax-un 7740 ax-cnex 11184 ax-1cn 11186 ax-addrcl 11189 ax-rnegex 11199 ax-cnre 11201 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2741 df-cleq 2754 df-clel 2837 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-xp 5665 df-pnf 11273 df-mnf 11274 df-xr 11275 df-ltxr 11276 |
| This theorem is used by: ge0gtmnf 13228 xsubge0 13317 sgnmnf 15172 leordtval2 23443 mnfnei 23452 ovolicopnf 25758 voliunlem3 25786 volsup 25790 volivth 25841 itg2seq 25976 itg2monolem2 25985 deg1lt0 26323 plypf1 26445 xrge00 33462 dvasin 38461 readvrec2 43244 readvrec 43245 hbtlem5 43977 xrge0nemnfd 46170 xrpnf 46321 fourierdlem87 47029 fouriersw 47067 gsumge0cl 47207 sge0pr 47230 sge0ssre 47233 |
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