Theorem elind 3394

Description: Deduce membership in an intersection of two classes. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.)

Hypotheses

Ref	Expression
elind.1	⊢ (𝜑 → 𝑋 ∈ 𝐴)
elind.2	⊢ (𝜑 → 𝑋 ∈ 𝐵)

Assertion

Ref	Expression
elind	⊢ (𝜑 → 𝑋 ∈ (𝐴 ∩ 𝐵))

Proof of Theorem elind

Step	Hyp	Ref	Expression
1		elind.1	. 2 ⊢ (𝜑 → 𝑋 ∈ 𝐴)
2		elind.2	. 2 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
3		elin 3392	. 2 ⊢ (𝑋 ∈ (𝐴 ∩ 𝐵) ↔ (𝑋 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵))
4	1, 2, 3	sylanbrc 417	1 ⊢ (𝜑 → 𝑋 ∈ (𝐴 ∩ 𝐵))

Syntax hints:   → wi 4   ∈ wcel 2202   ∩ cin 3200

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

This theorem is referenced by:  fnfvimad  5900  elfir  7215  infpwfidom  7452  nninfdclemcl  13132  nninfdclemp1  13134  strslfv2d  13188  bassetsnn  13202  insubm  13631  2idl0  14591  2idl1  14592  baspartn  14844  bastg  14855  isopn3  14919  restbasg  14962  lmss  15040  metrest  15300  tgioo  15348  dvmulxxbr  15496  elply2  15529  pilem3  15577  2sqlem7  15923