Theorem prssd 3826

Description: Deduction version of prssi 3825: A pair of elements of a class is a subset of the class. (Contributed by Glauco Siliprandi, 17-Aug-2020.)

Hypotheses

Ref	Expression
prssd.1	⊢ (𝜑 → 𝐴 ∈ 𝐶)
prssd.2	⊢ (𝜑 → 𝐵 ∈ 𝐶)

Assertion

Ref	Expression
prssd	⊢ (𝜑 → {𝐴, 𝐵} ⊆ 𝐶)

Proof of Theorem prssd

Step	Hyp	Ref	Expression
1		prssd.1	. 2 ⊢ (𝜑 → 𝐴 ∈ 𝐶)
2		prssd.2	. 2 ⊢ (𝜑 → 𝐵 ∈ 𝐶)
3		prssi 3825	. 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) → {𝐴, 𝐵} ⊆ 𝐶)
4	1, 2, 3	syl2anc 411	1 ⊢ (𝜑 → {𝐴, 𝐵} ⊆ 𝐶)

Syntax hints:   → wi 4   ∈ wcel 2200   ⊆ wss 3197  {cpr 3667

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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211

This theorem depends on definitions:  df-bi 117  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-v 2801  df-un 3201  df-in 3203  df-ss 3210  df-sn 3672  df-pr 3673

This theorem is referenced by:  bassetsnn  13084  0idnsgd  13748  isnzr2  14142  lspprcl  14351  lsptpcl  14352  lspprss  14364  lspprid1  14369  perfectlem2  15668  upgr1edc  15915