Theorem elind 3227

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 3225	. 2 ⊢ (𝑋 ∈ (𝐴 ∩ 𝐵) ↔ (𝑋 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵))
4	1, 2, 3	sylanbrc 411	1 ⊢ (𝜑 → 𝑋 ∈ (𝐴 ∩ 𝐵))

Syntax hints:   → wi 4   ∈ wcel 1463   ∩ cin 3036

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 681  ax-5 1406  ax-7 1407  ax-gen 1408  ax-ie1 1452  ax-ie2 1453  ax-8 1465  ax-10 1466  ax-11 1467  ax-i12 1468  ax-bndl 1469  ax-4 1470  ax-17 1489  ax-i9 1493  ax-ial 1497  ax-i5r 1498  ax-ext 2097

This theorem depends on definitions:  df-bi 116  df-tru 1317  df-nf 1420  df-sb 1719  df-clab 2102  df-cleq 2108  df-clel 2111  df-nfc 2244  df-v 2659  df-in 3043

This theorem is referenced by:  elfir  6813  infpwfidom  7002  strslfv2d  11844  baspartn  12060  bastg  12073  isopn3  12137  restbasg  12180  lmss  12257  metrest  12495  tgioo  12532  dvmulxxbr  12621