Theorem prssd 3832

Description: Deduction version of prssi 3831: 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 3831	. 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) → {𝐴, 𝐵} ⊆ 𝐶)
4	1, 2, 3	syl2anc 411	1 ⊢ (𝜑 → {𝐴, 𝐵} ⊆ 𝐶)

Syntax hints:   → wi 4   ∈ wcel 2202   ⊆ wss 3200  {cpr 3670

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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2213

This theorem depends on definitions:  df-bi 117  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-sn 3675  df-pr 3676

This theorem is referenced by:  bassetsnn  13138  0idnsgd  13802  isnzr2  14197  lspprcl  14406  lsptpcl  14407  lspprss  14419  lspprid1  14424  perfectlem2  15723  upgr1edc  15971  uspgr1edc  16090