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Theorem ssc1 18011
Description: Infer subset relation on objects from the subcategory subset relation. (Contributed by Mario Carneiro, 6-Jan-2017.)
Hypotheses
Ref Expression
isssc.1 (𝜑 → 𝐻 Fn (𝑆 × 𝑆))
isssc.2 (𝜑 → 𝐽 Fn (𝑇 × 𝑇))
ssc1.3 (𝜑 → 𝐻 ⊆cat 𝐽)
Assertion
Ref Expression
ssc1 (𝜑 → 𝑆 ⊆ 𝑇)

Proof of Theorem ssc1
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ssc1.3 . . 3 (𝜑 → 𝐻 ⊆cat 𝐽)
2 isssc.1 . . . 4 (𝜑 → 𝐻 Fn (𝑆 × 𝑆))
3 isssc.2 . . . 4 (𝜑 → 𝐽 Fn (𝑇 × 𝑇))
4 sscrel 18003 . . . . . . 7 Rel ⊆cat
54brrelex2i 5712 . . . . . 6 (𝐻 ⊆cat 𝐽 → 𝐽 ∈ V)
61, 5syl 18 . . . . 5 (𝜑 → 𝐽 ∈ V)
73ssclem 18009 . . . . 5 (𝜑 → (𝐽 ∈ V ↔ 𝑇 ∈ V))
86, 7mpbid 235 . . . 4 (𝜑 → 𝑇 ∈ V)
92, 3, 8isssc 18010 . . 3 (𝜑 → (𝐻 ⊆cat 𝐽 ↔ (𝑆 ⊆ 𝑇 ∧ ∀𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑆 (𝑥𝐻𝑦) ⊆ (𝑥𝐽𝑦))))
101, 9mpbid 235 . 2 (𝜑 → (𝑆 ⊆ 𝑇 ∧ ∀𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑆 (𝑥𝐻𝑦) ⊆ (𝑥𝐽𝑦)))
1110simpld 500 1 (𝜑 → 𝑆 ⊆ 𝑇)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∧ wa 401   ∈ wcel 2146  ∀wral 3080  Vcvv 3454   ⊆ wss 3900   class class class wbr 5106   × cxp 5653   Fn wfn 6542  (class class class)co 7430   ⊆cat cssc 17997
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1944  ax-6 2001  ax-7 2042  ax-8 2148  ax-9 2156  ax-10 2179  ax-11 2196  ax-12 2215  ax-ext 2735  ax-rep 5235  ax-sep 5252  ax-nul 5263  ax-pow 5331  ax-pr 5395  ax-un 7761
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2101  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ne 2960  df-ral 3081  df-rex 3091  df-reu 3370  df-rab 3417  df-v 3456  df-sbc 3743  df-csb 3852  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-pw 4562  df-sn 4589  df-pr 4591  df-op 4839  df-uni 4871  df-iun 4956  df-br 5107  df-opab 5171  df-mpt 5190  df-id 5550  df-xp 5661  df-rel 5662  df-cnv 5663  df-co 5664  df-dm 5665  df-rn 5666  df-res 5667  df-ima 5668  df-iota 6501  df-fun 6549  df-fn 6550  df-f 6551  df-f1 6552  df-fo 6553  df-f1o 6554  df-fv 6555  df-ov 7433  df-ixp 8940  df-ssc 18000
This theorem is used by:  ssctr  18015  ssceq  18016  subcss1  18032  issubc3  18039  subsubc  18043  iinfssc  50313  ssccatid  50328
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