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Theorem ofoaass 42668
Description: Component-wise addition of ordinal-yielding functions is associative. (Contributed by RP, 5-Jan-2025.)
Assertion
Ref Expression
ofoaass (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → ((𝐹f +o 𝐺) ∘f +o 𝐻) = (𝐹f +o (𝐺f +o 𝐻)))

Proof of Theorem ofoaass
Dummy variable 𝑎 is distinct from all other variables.
StepHypRef Expression
1 elmapfn 8858 . . . . . 6 (𝐹 ∈ (𝐵m 𝐴) → 𝐹 Fn 𝐴)
213ad2ant1 1130 . . . . 5 ((𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴)) → 𝐹 Fn 𝐴)
32adantl 481 . . . 4 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → 𝐹 Fn 𝐴)
4 elmapfn 8858 . . . . . 6 (𝐺 ∈ (𝐵m 𝐴) → 𝐺 Fn 𝐴)
543ad2ant2 1131 . . . . 5 ((𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴)) → 𝐺 Fn 𝐴)
65adantl 481 . . . 4 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → 𝐺 Fn 𝐴)
7 simpll 764 . . . 4 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → 𝐴𝑉)
8 inidm 4213 . . . 4 (𝐴𝐴) = 𝐴
93, 6, 7, 7, 8offn 7679 . . 3 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → (𝐹f +o 𝐺) Fn 𝐴)
10 elmapfn 8858 . . . . 5 (𝐻 ∈ (𝐵m 𝐴) → 𝐻 Fn 𝐴)
11103ad2ant3 1132 . . . 4 ((𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴)) → 𝐻 Fn 𝐴)
1211adantl 481 . . 3 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → 𝐻 Fn 𝐴)
139, 12, 7, 7, 8offn 7679 . 2 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → ((𝐹f +o 𝐺) ∘f +o 𝐻) Fn 𝐴)
146, 12, 7, 7, 8offn 7679 . . 3 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → (𝐺f +o 𝐻) Fn 𝐴)
153, 14, 7, 7, 8offn 7679 . 2 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → (𝐹f +o (𝐺f +o 𝐻)) Fn 𝐴)
16 simpllr 773 . . . . . 6 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → 𝐵 ∈ On)
17 elmapi 8842 . . . . . . . . 9 (𝐹 ∈ (𝐵m 𝐴) → 𝐹:𝐴𝐵)
18173ad2ant1 1130 . . . . . . . 8 ((𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴)) → 𝐹:𝐴𝐵)
1918adantl 481 . . . . . . 7 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → 𝐹:𝐴𝐵)
2019ffvelcdmda 7079 . . . . . 6 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → (𝐹𝑎) ∈ 𝐵)
21 onelon 6382 . . . . . 6 ((𝐵 ∈ On ∧ (𝐹𝑎) ∈ 𝐵) → (𝐹𝑎) ∈ On)
2216, 20, 21syl2anc 583 . . . . 5 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → (𝐹𝑎) ∈ On)
23 elmapi 8842 . . . . . . . . 9 (𝐺 ∈ (𝐵m 𝐴) → 𝐺:𝐴𝐵)
24233ad2ant2 1131 . . . . . . . 8 ((𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴)) → 𝐺:𝐴𝐵)
2524adantl 481 . . . . . . 7 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → 𝐺:𝐴𝐵)
2625ffvelcdmda 7079 . . . . . 6 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → (𝐺𝑎) ∈ 𝐵)
27 onelon 6382 . . . . . 6 ((𝐵 ∈ On ∧ (𝐺𝑎) ∈ 𝐵) → (𝐺𝑎) ∈ On)
2816, 26, 27syl2anc 583 . . . . 5 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → (𝐺𝑎) ∈ On)
29 elmapi 8842 . . . . . . . . 9 (𝐻 ∈ (𝐵m 𝐴) → 𝐻:𝐴𝐵)
30293ad2ant3 1132 . . . . . . . 8 ((𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴)) → 𝐻:𝐴𝐵)
3130adantl 481 . . . . . . 7 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → 𝐻:𝐴𝐵)
3231ffvelcdmda 7079 . . . . . 6 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → (𝐻𝑎) ∈ 𝐵)
33 onelon 6382 . . . . . 6 ((𝐵 ∈ On ∧ (𝐻𝑎) ∈ 𝐵) → (𝐻𝑎) ∈ On)
3416, 32, 33syl2anc 583 . . . . 5 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → (𝐻𝑎) ∈ On)
35 oaass 8559 . . . . 5 (((𝐹𝑎) ∈ On ∧ (𝐺𝑎) ∈ On ∧ (𝐻𝑎) ∈ On) → (((𝐹𝑎) +o (𝐺𝑎)) +o (𝐻𝑎)) = ((𝐹𝑎) +o ((𝐺𝑎) +o (𝐻𝑎))))
3622, 28, 34, 35syl3anc 1368 . . . 4 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → (((𝐹𝑎) +o (𝐺𝑎)) +o (𝐻𝑎)) = ((𝐹𝑎) +o ((𝐺𝑎) +o (𝐻𝑎))))
373adantr 480 . . . . . 6 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → 𝐹 Fn 𝐴)
386adantr 480 . . . . . 6 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → 𝐺 Fn 𝐴)
397anim1i 614 . . . . . 6 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → (𝐴𝑉𝑎𝐴))
40 fnfvof 7683 . . . . . 6 (((𝐹 Fn 𝐴𝐺 Fn 𝐴) ∧ (𝐴𝑉𝑎𝐴)) → ((𝐹f +o 𝐺)‘𝑎) = ((𝐹𝑎) +o (𝐺𝑎)))
4137, 38, 39, 40syl21anc 835 . . . . 5 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → ((𝐹f +o 𝐺)‘𝑎) = ((𝐹𝑎) +o (𝐺𝑎)))
4241oveq1d 7419 . . . 4 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → (((𝐹f +o 𝐺)‘𝑎) +o (𝐻𝑎)) = (((𝐹𝑎) +o (𝐺𝑎)) +o (𝐻𝑎)))
436, 12jca 511 . . . . . 6 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → (𝐺 Fn 𝐴𝐻 Fn 𝐴))
44 fnfvof 7683 . . . . . 6 (((𝐺 Fn 𝐴𝐻 Fn 𝐴) ∧ (𝐴𝑉𝑎𝐴)) → ((𝐺f +o 𝐻)‘𝑎) = ((𝐺𝑎) +o (𝐻𝑎)))
4543, 39, 44syl2an2r 682 . . . . 5 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → ((𝐺f +o 𝐻)‘𝑎) = ((𝐺𝑎) +o (𝐻𝑎)))
4645oveq2d 7420 . . . 4 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → ((𝐹𝑎) +o ((𝐺f +o 𝐻)‘𝑎)) = ((𝐹𝑎) +o ((𝐺𝑎) +o (𝐻𝑎))))
4736, 42, 463eqtr4d 2776 . . 3 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → (((𝐹f +o 𝐺)‘𝑎) +o (𝐻𝑎)) = ((𝐹𝑎) +o ((𝐺f +o 𝐻)‘𝑎)))
489, 12jca 511 . . . 4 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → ((𝐹f +o 𝐺) Fn 𝐴𝐻 Fn 𝐴))
49 fnfvof 7683 . . . 4 ((((𝐹f +o 𝐺) Fn 𝐴𝐻 Fn 𝐴) ∧ (𝐴𝑉𝑎𝐴)) → (((𝐹f +o 𝐺) ∘f +o 𝐻)‘𝑎) = (((𝐹f +o 𝐺)‘𝑎) +o (𝐻𝑎)))
5048, 39, 49syl2an2r 682 . . 3 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → (((𝐹f +o 𝐺) ∘f +o 𝐻)‘𝑎) = (((𝐹f +o 𝐺)‘𝑎) +o (𝐻𝑎)))
513, 14jca 511 . . . 4 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → (𝐹 Fn 𝐴 ∧ (𝐺f +o 𝐻) Fn 𝐴))
52 fnfvof 7683 . . . 4 (((𝐹 Fn 𝐴 ∧ (𝐺f +o 𝐻) Fn 𝐴) ∧ (𝐴𝑉𝑎𝐴)) → ((𝐹f +o (𝐺f +o 𝐻))‘𝑎) = ((𝐹𝑎) +o ((𝐺f +o 𝐻)‘𝑎)))
5351, 39, 52syl2an2r 682 . . 3 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → ((𝐹f +o (𝐺f +o 𝐻))‘𝑎) = ((𝐹𝑎) +o ((𝐺f +o 𝐻)‘𝑎)))
5447, 50, 533eqtr4d 2776 . 2 ((((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) ∧ 𝑎𝐴) → (((𝐹f +o 𝐺) ∘f +o 𝐻)‘𝑎) = ((𝐹f +o (𝐺f +o 𝐻))‘𝑎))
5513, 15, 54eqfnfvd 7028 1 (((𝐴𝑉𝐵 ∈ On) ∧ (𝐹 ∈ (𝐵m 𝐴) ∧ 𝐺 ∈ (𝐵m 𝐴) ∧ 𝐻 ∈ (𝐵m 𝐴))) → ((𝐹f +o 𝐺) ∘f +o 𝐻) = (𝐹f +o (𝐺f +o 𝐻)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395  w3a 1084   = wceq 1533  wcel 2098  Oncon0 6357   Fn wfn 6531  wf 6532  cfv 6536  (class class class)co 7404  f cof 7664   +o coa 8461  m cmap 8819
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1905  ax-6 1963  ax-7 2003  ax-8 2100  ax-9 2108  ax-10 2129  ax-11 2146  ax-12 2163  ax-ext 2697  ax-rep 5278  ax-sep 5292  ax-nul 5299  ax-pow 5356  ax-pr 5420  ax-un 7721
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 845  df-3or 1085  df-3an 1086  df-tru 1536  df-fal 1546  df-ex 1774  df-nf 1778  df-sb 2060  df-mo 2528  df-eu 2557  df-clab 2704  df-cleq 2718  df-clel 2804  df-nfc 2879  df-ne 2935  df-ral 3056  df-rex 3065  df-rmo 3370  df-reu 3371  df-rab 3427  df-v 3470  df-sbc 3773  df-csb 3889  df-dif 3946  df-un 3948  df-in 3950  df-ss 3960  df-pss 3962  df-nul 4318  df-if 4524  df-pw 4599  df-sn 4624  df-pr 4626  df-op 4630  df-uni 4903  df-int 4944  df-iun 4992  df-br 5142  df-opab 5204  df-mpt 5225  df-tr 5259  df-id 5567  df-eprel 5573  df-po 5581  df-so 5582  df-fr 5624  df-we 5626  df-xp 5675  df-rel 5676  df-cnv 5677  df-co 5678  df-dm 5679  df-rn 5680  df-res 5681  df-ima 5682  df-pred 6293  df-ord 6360  df-on 6361  df-lim 6362  df-suc 6363  df-iota 6488  df-fun 6538  df-fn 6539  df-f 6540  df-f1 6541  df-fo 6542  df-f1o 6543  df-fv 6544  df-ov 7407  df-oprab 7408  df-mpo 7409  df-of 7666  df-om 7852  df-1st 7971  df-2nd 7972  df-frecs 8264  df-wrecs 8295  df-recs 8369  df-rdg 8408  df-oadd 8468  df-map 8821
This theorem is referenced by: (None)
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