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| Mirrors > Home > ILE Home > Th. List > mnflt0 | GIF version | ||
| Description: Minus infinity is less than 0 (common case). (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| mnflt0 | ⊢ -∞ < 0 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0re 8079 | . 2 ⊢ 0 ∈ ℝ | |
| 2 | mnflt 9912 | . 2 ⊢ (0 ∈ ℝ → -∞ < 0) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ -∞ < 0 |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2177 class class class wbr 4047 ℝcr 7931 0cc0 7932 -∞cmnf 8112 < clt 8114 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-sep 4166 ax-pow 4222 ax-pr 4257 ax-un 4484 ax-cnex 8023 ax-1re 8026 ax-addrcl 8029 ax-rnegex 8041 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ral 2490 df-rex 2491 df-v 2775 df-un 3171 df-in 3173 df-ss 3180 df-pw 3619 df-sn 3640 df-pr 3641 df-op 3643 df-uni 3853 df-br 4048 df-opab 4110 df-xp 4685 df-pnf 8116 df-mnf 8117 df-xr 8118 df-ltxr 8119 |
| This theorem is referenced by: ge0gtmnf 9952 xsubge0 10010 |
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