Theorem ssel2 3092

Description: Membership relationships follow from a subclass relationship. (Contributed by NM, 7-Jun-2004.)

Assertion

Ref	Expression
ssel2	⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐶 ∈ 𝐴) → 𝐶 ∈ 𝐵)

Proof of Theorem ssel2

Step	Hyp	Ref	Expression
1		ssel 3091	. 2 ⊢ (𝐴 ⊆ 𝐵 → (𝐶 ∈ 𝐴 → 𝐶 ∈ 𝐵))
2	1	imp 123	1 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐶 ∈ 𝐴) → 𝐶 ∈ 𝐵)

Syntax hints:   → wi 4   ∧ wa 103   ∈ wcel 1480   ⊆ wss 3071

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-11 1484  ax-4 1487  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2121

This theorem depends on definitions:  df-bi 116  df-nf 1437  df-sb 1736  df-clab 2126  df-cleq 2132  df-clel 2135  df-in 3077  df-ss 3084

This theorem is referenced by:  elnn  4519  funimass4  5472  fvelimab  5477  ssimaex  5482  funconstss  5538  rexima  5656  ralima  5657  1st2nd  6079  f1o2ndf1  6125  tfri1dALT  6248  eldju1st  6956  axsuploc  7837  lbinf  8706  dfinfre  8714  lbzbi  9408  elfzom1elp1fzo  9979  ssfzo12  10001  seq3split  10252  shftlem  10588  tgcl  12233  neipsm  12323  txbasval  12436  elmopn2  12618  metrest  12675  cncfmet  12748  negcncf  12757