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| Mirrors > Home > MPE Home > Th. List > 0ltpnf | Structured version Visualization version GIF version | ||
| Description: Zero is less than plus infinity. (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| 0ltpnf | ⊢ 0 < +∞ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0re 11349 | . 2 ⊢ 0 ∈ ℝ | |
| 2 | ltpnf 13289 | . 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 2147 class class class wbr 5108 ℝcr 11238 0cc0 11239 +∞cpnf 11379 < clt 11382 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-sep 5255 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-cnex 11295 ax-1cn 11297 ax-addrcl 11300 ax-rnegex 11310 ax-cnre 11312 |
| 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 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-br 5109 df-opab 5174 df-xp 5664 df-pnf 11384 df-xr 11386 df-ltxr 11387 |
| This theorem is used by: xmulgt0 13453 reltxrnmnf 13513 hashneq0 14549 hashge2el2dif 14666 sgnpnf 15289 pnfnei 23593 0bdop 32652 xlt2addrd 33447 xnn0gt0 33457 xrge0mulc1cn 34684 pnfneige0 34694 lmxrge0 34695 mbfposadd 38853 ftc1anclem5 38883 fourierdlem111 47500 fouriersw 47514 |
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