Theorem ssbri 4049

Description: Inference from a subclass relationship of binary relations. (Contributed by NM, 28-Mar-2007.) (Revised by Mario Carneiro, 8-Feb-2015.)

Hypothesis

Ref	Expression
ssbri.1	⊢ 𝐴 ⊆ 𝐵

Assertion

Ref	Expression
ssbri	⊢ (𝐶𝐴𝐷 → 𝐶𝐵𝐷)

Proof of Theorem ssbri

Step	Hyp	Ref	Expression
1		ssbri.1	. . . 4 ⊢ 𝐴 ⊆ 𝐵
2	1	a1i 9	. . 3 ⊢ (⊤ → 𝐴 ⊆ 𝐵)
3	2	ssbrd 4048	. 2 ⊢ (⊤ → (𝐶𝐴𝐷 → 𝐶𝐵𝐷))
4	3	mptru 1362	1 ⊢ (𝐶𝐴𝐷 → 𝐶𝐵𝐷)

Syntax hints:   → wi 4  ⊤wtru 1354   ⊆ wss 3131   class class class wbr 4005

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-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-11 1506  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159

This theorem depends on definitions:  df-bi 117  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-in 3137  df-ss 3144  df-br 4006

This theorem is referenced by:  brel  4680  swoer  6565  swoord1  6566  swoord2  6567  ecopover  6635  ecopoverg  6638  endom  6765