Theorem ssc1 17093

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.

Step	Hyp	Ref	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 17085	. . . . . . 7 ⊢ Rel ⊆cat
5	4	brrelex2i 5611	. . . . . 6 ⊢ (𝐻 ⊆cat 𝐽 → 𝐽 ∈ V)
6	1, 5	syl 17	. . . . 5 ⊢ (𝜑 → 𝐽 ∈ V)
7	3	ssclem 17091	. . . . 5 ⊢ (𝜑 → (𝐽 ∈ V ↔ 𝑇 ∈ V))
8	6, 7	mpbid 234	. . . 4 ⊢ (𝜑 → 𝑇 ∈ V)
9	2, 3, 8	isssc 17092	. . 3 ⊢ (𝜑 → (𝐻 ⊆cat 𝐽 ↔ (𝑆 ⊆ 𝑇 ∧ ∀𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑆 (𝑥𝐻𝑦) ⊆ (𝑥𝐽𝑦))))
10	1, 9	mpbid 234	. 2 ⊢ (𝜑 → (𝑆 ⊆ 𝑇 ∧ ∀𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑆 (𝑥𝐻𝑦) ⊆ (𝑥𝐽𝑦)))
11	10	simpld 497	1 ⊢ (𝜑 → 𝑆 ⊆ 𝑇)

Syntax hints:   → wi 4   ∧ wa 398   ∈ wcel 2114  ∀wral 3140  Vcvv 3496   ⊆ wss 3938   class class class wbr 5068   × cxp 5555   Fn wfn 6352  (class class class)co 7158   ⊆_cat cssc 17079

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-rep 5192  ax-sep 5205  ax-nul 5212  ax-pow 5268  ax-pr 5332  ax-un 7463

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-ral 3145  df-rex 3146  df-reu 3147  df-rab 3149  df-v 3498  df-sbc 3775  df-csb 3886  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-op 4576  df-uni 4841  df-iun 4923  df-br 5069  df-opab 5131  df-mpt 5149  df-id 5462  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-iota 6316  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364  df-fv 6365  df-ov 7161  df-ixp 8464  df-ssc 17082

This theorem is referenced by:  ssctr  17097  ssceq  17098  subcss1  17114  issubc3  17121  subsubc  17125