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| Mirrors > Home > MPE Home > Th. List > 0xnn0 | Structured version Visualization version GIF version | ||
| Description: Zero is an extended nonnegative integer. (Contributed by AV, 10-Dec-2020.) |
| Ref | Expression |
|---|---|
| 0xnn0 | ⊢ 0 ∈ ℕ0* |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nn0ssxnn0 12689 | . 2 ⊢ ℕ0 ⊆ ℕ0* | |
| 2 | 0nn0 12628 | . 2 ⊢ 0 ∈ ℕ0 | |
| 3 | 1, 2 | sselii 3906 | 1 ⊢ 0 ∈ ℕ0* |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2144 0cc0 11207 ℕ0cn0 12613 ℕ0*cxnn0 12686 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-1cn 11265 ax-icn 11266 ax-addcl 11267 ax-mulcl 11269 ax-i2m1 11275 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-tru 1572 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-v 3452 df-ss 3897 df-un 4150 df-sn 4585 df-n0 12614 df-xnn0 12687 |
| This theorem is used by: 0edg0rgr 30162 rgrusgrprc 30179 rusgrprc 30180 rgrprcx 30182 |
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