Theorem opprmulfvalg 14348

Description: Value of the multiplication operation of an opposite ring. (Contributed by Mario Carneiro, 1-Dec-2014.)

Hypotheses

Ref	Expression
opprval.1	⊢ 𝐵 = (Base‘𝑅)
opprval.2	⊢ · = (.r‘𝑅)
opprval.3	⊢ 𝑂 = (oppr‘𝑅)
opprmulfval.4	⊢ ∙ = (.r‘𝑂)

Assertion

Ref	Expression
opprmulfvalg	⊢ (𝑅 ∈ 𝑉 → ∙ = tpos · )

Proof of Theorem opprmulfvalg

Step	Hyp	Ref	Expression
1		opprmulfval.4	. 2 ⊢ ∙ = (.r‘𝑂)
2		opprval.1	. . . . 5 ⊢ 𝐵 = (Base‘𝑅)
3		opprval.2	. . . . 5 ⊢ · = (.r‘𝑅)
4		opprval.3	. . . . 5 ⊢ 𝑂 = (oppr‘𝑅)
5	2, 3, 4	opprvalg 14347	. . . 4 ⊢ (𝑅 ∈ 𝑉 → 𝑂 = (𝑅 sSet ⟨(.r‘ndx), tpos · ⟩))
6	5	fveq2d 5694	. . 3 ⊢ (𝑅 ∈ 𝑉 → (.r‘𝑂) = (.r‘(𝑅 sSet ⟨(.r‘ndx), tpos · ⟩)))
7		mulrslid 13463	. . . . . . 7 ⊢ (.r = Slot (.r‘ndx) ∧ (.r‘ndx) ∈ ℕ)
8	7	slotex 13357	. . . . . 6 ⊢ (𝑅 ∈ 𝑉 → (.r‘𝑅) ∈ V)
9	3, 8	eqeltrid 2325	. . . . 5 ⊢ (𝑅 ∈ 𝑉 → · ∈ V)
10		tposexg 6519	. . . . 5 ⊢ ( · ∈ V → tpos · ∈ V)
11	9, 10	syl 14	. . . 4 ⊢ (𝑅 ∈ 𝑉 → tpos · ∈ V)
12	7	setsslid 13381	. . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ tpos · ∈ V) → tpos · = (.r‘(𝑅 sSet ⟨(.r‘ndx), tpos · ⟩)))
13	11, 12	mpdan 425	. . 3 ⊢ (𝑅 ∈ 𝑉 → tpos · = (.r‘(𝑅 sSet ⟨(.r‘ndx), tpos · ⟩)))
14	6, 13	eqtr4d 2274	. 2 ⊢ (𝑅 ∈ 𝑉 → (.r‘𝑂) = tpos · )
15	1, 14	eqtrid 2283	1 ⊢ (𝑅 ∈ 𝑉 → ∙ = tpos · )

Syntax hints:   → wi 4   = wceq 1402   ∈ wcel 2209  Vcvv 2821  ⟨cop 3708  ‘cfv 5372  (class class class)co 6075  tpos ctpos 6505  ndxcnx 13327   sSet csts 13328  Basecbs 13330  ._rcmulr 13409  opp_rcoppr 14345

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4244  ax-nul 4254  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-cnex 8260  ax-resscn 8261  ax-1re 8263  ax-addrcl 8266

This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-br 4126  df-opab 4188  df-mpt 4189  df-id 4433  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-fv 5380  df-ov 6078  df-oprab 6079  df-mpo 6080  df-tpos 6506  df-inn 9284  df-2 9342  df-3 9343  df-ndx 13333  df-slot 13334  df-sets 13337  df-mulr 13422  df-oppr 14346

This theorem is referenced by:  opprmulg  14349