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Theorem ssc1 17790
Description: Infer subset relation on objects from the subcategory subset relation. (Contributed by Mario Carneiro, 6-Jan-2017.)
Hypotheses
Ref Expression
isssc.1 (𝜑𝐻 Fn (𝑆 × 𝑆))
isssc.2 (𝜑𝐽 Fn (𝑇 × 𝑇))
ssc1.3 (𝜑𝐻cat 𝐽)
Assertion
Ref Expression
ssc1 (𝜑𝑆𝑇)

Proof of Theorem ssc1
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ssc1.3 . . 3 (𝜑𝐻cat 𝐽)
2 isssc.1 . . . 4 (𝜑𝐻 Fn (𝑆 × 𝑆))
3 isssc.2 . . . 4 (𝜑𝐽 Fn (𝑇 × 𝑇))
4 sscrel 17782 . . . . . . 7 Rel ⊆cat
54brrelex2i 5698 . . . . . 6 (𝐻cat 𝐽𝐽 ∈ V)
61, 5syl 17 . . . . 5 (𝜑𝐽 ∈ V)
73ssclem 17788 . . . . 5 (𝜑 → (𝐽 ∈ V ↔ 𝑇 ∈ V))
86, 7mpbid 232 . . . 4 (𝜑𝑇 ∈ V)
92, 3, 8isssc 17789 . . 3 (𝜑 → (𝐻cat 𝐽 ↔ (𝑆𝑇 ∧ ∀𝑥𝑆𝑦𝑆 (𝑥𝐻𝑦) ⊆ (𝑥𝐽𝑦))))
101, 9mpbid 232 . 2 (𝜑 → (𝑆𝑇 ∧ ∀𝑥𝑆𝑦𝑆 (𝑥𝐻𝑦) ⊆ (𝑥𝐽𝑦)))
1110simpld 494 1 (𝜑𝑆𝑇)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395  wcel 2109  wral 3045  Vcvv 3450  wss 3917   class class class wbr 5110   × cxp 5639   Fn wfn 6509  (class class class)co 7390  cat cssc 17776
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2702  ax-rep 5237  ax-sep 5254  ax-nul 5264  ax-pow 5323  ax-pr 5390  ax-un 7714
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2534  df-eu 2563  df-clab 2709  df-cleq 2722  df-clel 2804  df-nfc 2879  df-ne 2927  df-ral 3046  df-rex 3055  df-reu 3357  df-rab 3409  df-v 3452  df-sbc 3757  df-csb 3866  df-dif 3920  df-un 3922  df-in 3924  df-ss 3934  df-nul 4300  df-if 4492  df-pw 4568  df-sn 4593  df-pr 4595  df-op 4599  df-uni 4875  df-iun 4960  df-br 5111  df-opab 5173  df-mpt 5192  df-id 5536  df-xp 5647  df-rel 5648  df-cnv 5649  df-co 5650  df-dm 5651  df-rn 5652  df-res 5653  df-ima 5654  df-iota 6467  df-fun 6516  df-fn 6517  df-f 6518  df-f1 6519  df-fo 6520  df-f1o 6521  df-fv 6522  df-ov 7393  df-ixp 8874  df-ssc 17779
This theorem is referenced by:  ssctr  17794  ssceq  17795  subcss1  17811  issubc3  17818  subsubc  17822  iinfssc  49050  ssccatid  49065
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