Theorem nnn0s 28323

Description: A positive surreal integer is a non-negative surreal integer. (Contributed by Scott Fenton, 26-May-2025.)

Assertion

Ref	Expression
nnn0s	⊢ (𝐴 ∈ ℕs → 𝐴 ∈ ℕ0s)

Proof of Theorem nnn0s

Step	Hyp	Ref	Expression
1		nnssn0s 28317	. 2 ⊢ ℕs ⊆ ℕ0s
2	1	sseli 3929	1 ⊢ (𝐴 ∈ ℕs → 𝐴 ∈ ℕ0s)

Syntax hints:   → wi 4   ∈ wcel 2113  ℕ_0scn0s 28308  ℕ_scnns 28309

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-ext 2708

This theorem depends on definitions:  df-bi 207  df-an 396  df-tru 1544  df-ex 1781  df-sb 2068  df-clab 2715  df-cleq 2728  df-clel 2811  df-v 3442  df-dif 3904  df-ss 3918  df-nns 28311

This theorem is referenced by:  elzn0s  28394  eln0zs  28396  zseo  28418  addhalfcut  28455  bdaypw2n0bndlem  28459  bdayfinbndlem1  28463  z12bdaylem2  28467  z12sge0  28479