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Mirrors > Home > MPE Home > Th. List > sylan9ssr | Structured version Visualization version GIF version |
Description: A subclass transitivity deduction. (Contributed by NM, 27-Sep-2004.) |
Ref | Expression |
---|---|
sylan9ssr.1 | ⊢ (𝜑 → 𝐴 ⊆ 𝐵) |
sylan9ssr.2 | ⊢ (𝜓 → 𝐵 ⊆ 𝐶) |
Ref | Expression |
---|---|
sylan9ssr | ⊢ ((𝜓 ∧ 𝜑) → 𝐴 ⊆ 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sylan9ssr.1 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ 𝐵) | |
2 | sylan9ssr.2 | . . 3 ⊢ (𝜓 → 𝐵 ⊆ 𝐶) | |
3 | 1, 2 | sylan9ss 3934 | . 2 ⊢ ((𝜑 ∧ 𝜓) → 𝐴 ⊆ 𝐶) |
4 | 3 | ancoms 459 | 1 ⊢ ((𝜓 ∧ 𝜑) → 𝐴 ⊆ 𝐶) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 ⊆ wss 3887 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-ext 2709 |
This theorem depends on definitions: df-bi 206 df-an 397 df-tru 1542 df-ex 1783 df-sb 2068 df-clab 2716 df-cleq 2730 df-clel 2816 df-v 3434 df-in 3894 df-ss 3904 |
This theorem is referenced by: intssuni2 4904 marypha1 9193 cardinfima 9853 cfflb 10015 ssfin4 10066 acsfn 17368 mrelatlub 18280 efgval 19323 islbs3 20417 kgentopon 22689 txlly 22787 sigaclci 32100 bnj1014 32941 topjoin 34554 filnetlem3 34569 poimirlem16 35793 mblfinlem3 35816 sspwimpALT 42545 sspwimpALT2 42548 setrecsres 46407 |
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