Theorem rankssb 9819

Description: The subset relation is inherited by the rank function. Exercise 1 of [TakeutiZaring] p. 80. (Contributed by NM, 25-Nov-2003.) (Revised by Mario Carneiro, 17-Nov-2014.)

Assertion

Ref	Expression
rankssb	⊢ (𝐵 ∈ ∪ (𝑅1 “ On) → (𝐴 ⊆ 𝐵 → (rank‘𝐴) ⊆ (rank‘𝐵)))

Proof of Theorem rankssb

Step	Hyp	Ref	Expression
1		simpr 489	. . . 4 ⊢ ((𝐵 ∈ ∪ (𝑅1 “ On) ∧ 𝐴 ⊆ 𝐵) → 𝐴 ⊆ 𝐵)
2		r1rankidb 9775	. . . . 5 ⊢ (𝐵 ∈ ∪ (𝑅1 “ On) → 𝐵 ⊆ (𝑅1‘(rank‘𝐵)))
3	2	adantr 485	. . . 4 ⊢ ((𝐵 ∈ ∪ (𝑅1 “ On) ∧ 𝐴 ⊆ 𝐵) → 𝐵 ⊆ (𝑅1‘(rank‘𝐵)))
4	1, 3	sstrd 3946	. . 3 ⊢ ((𝐵 ∈ ∪ (𝑅1 “ On) ∧ 𝐴 ⊆ 𝐵) → 𝐴 ⊆ (𝑅1‘(rank‘𝐵)))
5		sswf 9779	. . . 4 ⊢ ((𝐵 ∈ ∪ (𝑅1 “ On) ∧ 𝐴 ⊆ 𝐵) → 𝐴 ∈ ∪ (𝑅1 “ On))
6		rankdmr1 9772	. . . 4 ⊢ (rank‘𝐵) ∈ dom 𝑅1
7		rankr1bg 9774	. . . 4 ⊢ ((𝐴 ∈ ∪ (𝑅1 “ On) ∧ (rank‘𝐵) ∈ dom 𝑅1) → (𝐴 ⊆ (𝑅1‘(rank‘𝐵)) ↔ (rank‘𝐴) ⊆ (rank‘𝐵)))
8	5, 6, 7	sylancl 597	. . 3 ⊢ ((𝐵 ∈ ∪ (𝑅1 “ On) ∧ 𝐴 ⊆ 𝐵) → (𝐴 ⊆ (𝑅1‘(rank‘𝐵)) ↔ (rank‘𝐴) ⊆ (rank‘𝐵)))
9	4, 8	mpbid 235	. 2 ⊢ ((𝐵 ∈ ∪ (𝑅1 “ On) ∧ 𝐴 ⊆ 𝐵) → (rank‘𝐴) ⊆ (rank‘𝐵))
10	9	ex 417	1 ⊢ (𝐵 ∈ ∪ (𝑅1 “ On) → (𝐴 ⊆ 𝐵 → (rank‘𝐴) ⊆ (rank‘𝐵)))

Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 400   ∈ wcel 2141   ⊆ wss 3904  ∪ cuni 4871  dom cdm 5661   “ cima 5664  Oncon0 6360  ‘cfv 6536  𝑅₁cr1 9733  rankcrnk 9734

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1823  ax-4 1837  ax-5 1938  ax-6 1995  ax-7 2036  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-sep 5256  ax-nul 5268  ax-pow 5336  ax-pr 5404  ax-un 7732

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1102  df-3an 1103  df-tru 1571  df-fal 1581  df-ex 1808  df-nf 1812  df-sb 2095  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3078  df-rex 3088  df-reu 3368  df-rab 3415  df-v 3455  df-sbc 3744  df-csb 3853  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-pss 3924  df-nul 4286  df-if 4487  df-pw 4563  df-sn 4589  df-pr 4591  df-op 4595  df-uni 4872  df-int 4912  df-iun 4957  df-br 5109  df-opab 5173  df-mpt 5192  df-tr 5218  df-id 5556  df-eprel 5561  df-po 5569  df-so 5570  df-fr 5614  df-we 5616  df-xp 5667  df-rel 5668  df-cnv 5669  df-co 5670  df-dm 5671  df-rn 5672  df-res 5673  df-ima 5674  df-pred 6302  df-ord 6363  df-on 6364  df-lim 6365  df-suc 6366  df-iota 6492  df-fun 6538  df-fn 6539  df-f 6540  df-f1 6541  df-fo 6542  df-f1o 6543  df-fv 6544  df-ov 7413  df-om 7862  df-2nd 7986  df-frecs 8277  df-wrecs 8308  df-recs 8357  df-rdg 8396  df-r1 9735  df-rank 9736

This theorem is referenced by:  rankss  9820  rankunb  9821  rankuni2b  9824  rankr1id  9833  rankval4b  35457