Theorem elpwi 3665

Description: Subset relation implied by membership in a power class. (Contributed by NM, 17-Feb-2007.)

Assertion

Ref	Expression
elpwi	⊢ (𝐴 ∈ 𝒫 𝐵 → 𝐴 ⊆ 𝐵)

Proof of Theorem elpwi

Step	Hyp	Ref	Expression
1		elpwg 3664	. 2 ⊢ (𝐴 ∈ 𝒫 𝐵 → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵))
2	1	ibi 176	1 ⊢ (𝐴 ∈ 𝒫 𝐵 → 𝐴 ⊆ 𝐵)

Syntax hints:   → wi 4   ∈ wcel 2202   ⊆ wss 3201  𝒫 cpw 3656

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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2213

This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-v 2805  df-in 3207  df-ss 3214  df-pw 3658

This theorem is referenced by:  elpwid  3667  elelpwi  3668  elpw2g  4251  eldifpw  4580  iunpw  4583  f1opw2  6239  pw1dc1  7149  fi0  7217  pw1m  7485  pw1on  7487  lspf  14468  cnntr  15019  edgssv2en  16123  2omap  16698  pw1map  16700