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Mirrors > Home > MPE Home > Th. List > Mathboxes > xnn0gt0 | Structured version Visualization version GIF version |
Description: Nonzero extended nonnegative integers are strictly greater than zero. (Contributed by Thierry Arnoux, 30-Jul-2023.) |
Ref | Expression |
---|---|
xnn0gt0 | ⊢ ((𝑁 ∈ ℕ0* ∧ 𝑁 ≠ 0) → 0 < 𝑁) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elxnn0 12546 | . 2 ⊢ (𝑁 ∈ ℕ0* ↔ (𝑁 ∈ ℕ0 ∨ 𝑁 = +∞)) | |
2 | elnnne0 12486 | . . . . . 6 ⊢ (𝑁 ∈ ℕ ↔ (𝑁 ∈ ℕ0 ∧ 𝑁 ≠ 0)) | |
3 | nngt0 12243 | . . . . . 6 ⊢ (𝑁 ∈ ℕ → 0 < 𝑁) | |
4 | 2, 3 | sylbir 234 | . . . . 5 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑁 ≠ 0) → 0 < 𝑁) |
5 | 4 | ancoms 460 | . . . 4 ⊢ ((𝑁 ≠ 0 ∧ 𝑁 ∈ ℕ0) → 0 < 𝑁) |
6 | 5 | adantll 713 | . . 3 ⊢ ((((𝑁 ∈ ℕ0 ∨ 𝑁 = +∞) ∧ 𝑁 ≠ 0) ∧ 𝑁 ∈ ℕ0) → 0 < 𝑁) |
7 | 0ltpnf 13102 | . . . . 5 ⊢ 0 < +∞ | |
8 | breq2 5153 | . . . . 5 ⊢ (𝑁 = +∞ → (0 < 𝑁 ↔ 0 < +∞)) | |
9 | 7, 8 | mpbiri 258 | . . . 4 ⊢ (𝑁 = +∞ → 0 < 𝑁) |
10 | 9 | adantl 483 | . . 3 ⊢ ((((𝑁 ∈ ℕ0 ∨ 𝑁 = +∞) ∧ 𝑁 ≠ 0) ∧ 𝑁 = +∞) → 0 < 𝑁) |
11 | simpl 484 | . . 3 ⊢ (((𝑁 ∈ ℕ0 ∨ 𝑁 = +∞) ∧ 𝑁 ≠ 0) → (𝑁 ∈ ℕ0 ∨ 𝑁 = +∞)) | |
12 | 6, 10, 11 | mpjaodan 958 | . 2 ⊢ (((𝑁 ∈ ℕ0 ∨ 𝑁 = +∞) ∧ 𝑁 ≠ 0) → 0 < 𝑁) |
13 | 1, 12 | sylanb 582 | 1 ⊢ ((𝑁 ∈ ℕ0* ∧ 𝑁 ≠ 0) → 0 < 𝑁) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 397 ∨ wo 846 = wceq 1542 ∈ wcel 2107 ≠ wne 2941 class class class wbr 5149 0cc0 11110 +∞cpnf 11245 < clt 11248 ℕcn 12212 ℕ0cn0 12472 ℕ0*cxnn0 12544 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-er 8703 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-nn 12213 df-n0 12473 df-xnn0 12545 |
This theorem is referenced by: nn0xmulclb 31984 |
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