Theorem elpwid 3369

Description: An element of a power class is a subclass. Deduction form of elpwi 3368. (Contributed by David Moews, 1-May-2017.)

Hypothesis

Ref	Expression
elpwid.1	⊢ (𝜑 → 𝐴 ∈ 𝒫 𝐵)

Assertion

Ref	Expression
elpwid	⊢ (𝜑 → 𝐴 ⊆ 𝐵)

Proof of Theorem elpwid

Step	Hyp	Ref	Expression
1		elpwid.1	. 2 ⊢ (𝜑 → 𝐴 ∈ 𝒫 𝐵)
2		elpwi 3368	. 2 ⊢ (𝐴 ∈ 𝒫 𝐵 → 𝐴 ⊆ 𝐵)
3	1, 2	syl 14	1 ⊢ (𝜑 → 𝐴 ⊆ 𝐵)

Syntax hints:   → wi 4   ∈ wcel 1393   ⊆ wss 2917  𝒫 cpw 3359

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022

This theorem depends on definitions:  df-bi 110  df-tru 1246  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-v 2559  df-in 2924  df-ss 2931  df-pw 3361

This theorem is referenced by:  fopwdom  6310  elnp1st2nd  6574  ixxssxr  8769  elfzoelz  9004