Theorem mapdjuen 9603

Description: Sum of exponents law for cardinal arithmetic. Theorem 6I(4) of [Enderton] p. 142. (Contributed by NM, 27-Sep-2004.) (Revised by Mario Carneiro, 29-Apr-2015.)

Assertion

Ref	Expression
mapdjuen	⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → (𝐴 ↑m (𝐵 ⊔ 𝐶)) ≈ ((𝐴 ↑m 𝐵) × (𝐴 ↑m 𝐶)))

Proof of Theorem mapdjuen

Step	Hyp	Ref	Expression
1		df-dju 9327	. . . 4 ⊢ (𝐵 ⊔ 𝐶) = (({∅} × 𝐵) ∪ ({1o} × 𝐶))
2	1	oveq2i 7164	. . 3 ⊢ (𝐴 ↑m (𝐵 ⊔ 𝐶)) = (𝐴 ↑m (({∅} × 𝐵) ∪ ({1o} × 𝐶)))
3		snex 5329	. . . . 5 ⊢ {∅} ∈ V
4		simp2 1132	. . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → 𝐵 ∈ 𝑊)
5		xpexg 7470	. . . . 5 ⊢ (({∅} ∈ V ∧ 𝐵 ∈ 𝑊) → ({∅} × 𝐵) ∈ V)
6	3, 4, 5	sylancr 589	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → ({∅} × 𝐵) ∈ V)
7		snex 5329	. . . . 5 ⊢ {1o} ∈ V
8		simp3 1133	. . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → 𝐶 ∈ 𝑋)
9		xpexg 7470	. . . . 5 ⊢ (({1o} ∈ V ∧ 𝐶 ∈ 𝑋) → ({1o} × 𝐶) ∈ V)
10	7, 8, 9	sylancr 589	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → ({1o} × 𝐶) ∈ V)
11		simp1 1131	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → 𝐴 ∈ 𝑉)
12		xp01disjl 8118	. . . . 5 ⊢ (({∅} × 𝐵) ∩ ({1o} × 𝐶)) = ∅
13	12	a1i 11	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → (({∅} × 𝐵) ∩ ({1o} × 𝐶)) = ∅)
14		mapunen 8683	. . . 4 ⊢ (((({∅} × 𝐵) ∈ V ∧ ({1o} × 𝐶) ∈ V ∧ 𝐴 ∈ 𝑉) ∧ (({∅} × 𝐵) ∩ ({1o} × 𝐶)) = ∅) → (𝐴 ↑m (({∅} × 𝐵) ∪ ({1o} × 𝐶))) ≈ ((𝐴 ↑m ({∅} × 𝐵)) × (𝐴 ↑m ({1o} × 𝐶))))
15	6, 10, 11, 13, 14	syl31anc 1368	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → (𝐴 ↑m (({∅} × 𝐵) ∪ ({1o} × 𝐶))) ≈ ((𝐴 ↑m ({∅} × 𝐵)) × (𝐴 ↑m ({1o} × 𝐶))))
16	2, 15	eqbrtrid 5098	. 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → (𝐴 ↑m (𝐵 ⊔ 𝐶)) ≈ ((𝐴 ↑m ({∅} × 𝐵)) × (𝐴 ↑m ({1o} × 𝐶))))
17		enrefg 8538	. . . . 5 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ≈ 𝐴)
18	11, 17	syl 17	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → 𝐴 ≈ 𝐴)
19		0ex 5208	. . . . 5 ⊢ ∅ ∈ V
20		xpsnen2g 8607	. . . . 5 ⊢ ((∅ ∈ V ∧ 𝐵 ∈ 𝑊) → ({∅} × 𝐵) ≈ 𝐵)
21	19, 4, 20	sylancr 589	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → ({∅} × 𝐵) ≈ 𝐵)
22		mapen 8678	. . . 4 ⊢ ((𝐴 ≈ 𝐴 ∧ ({∅} × 𝐵) ≈ 𝐵) → (𝐴 ↑m ({∅} × 𝐵)) ≈ (𝐴 ↑m 𝐵))
23	18, 21, 22	syl2anc 586	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → (𝐴 ↑m ({∅} × 𝐵)) ≈ (𝐴 ↑m 𝐵))
24		1on 8106	. . . . 5 ⊢ 1o ∈ On
25		xpsnen2g 8607	. . . . 5 ⊢ ((1o ∈ On ∧ 𝐶 ∈ 𝑋) → ({1o} × 𝐶) ≈ 𝐶)
26	24, 8, 25	sylancr 589	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → ({1o} × 𝐶) ≈ 𝐶)
27		mapen 8678	. . . 4 ⊢ ((𝐴 ≈ 𝐴 ∧ ({1o} × 𝐶) ≈ 𝐶) → (𝐴 ↑m ({1o} × 𝐶)) ≈ (𝐴 ↑m 𝐶))
28	18, 26, 27	syl2anc 586	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → (𝐴 ↑m ({1o} × 𝐶)) ≈ (𝐴 ↑m 𝐶))
29		xpen 8677	. . 3 ⊢ (((𝐴 ↑m ({∅} × 𝐵)) ≈ (𝐴 ↑m 𝐵) ∧ (𝐴 ↑m ({1o} × 𝐶)) ≈ (𝐴 ↑m 𝐶)) → ((𝐴 ↑m ({∅} × 𝐵)) × (𝐴 ↑m ({1o} × 𝐶))) ≈ ((𝐴 ↑m 𝐵) × (𝐴 ↑m 𝐶)))
30	23, 28, 29	syl2anc 586	. 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → ((𝐴 ↑m ({∅} × 𝐵)) × (𝐴 ↑m ({1o} × 𝐶))) ≈ ((𝐴 ↑m 𝐵) × (𝐴 ↑m 𝐶)))
31		entr 8558	. 2 ⊢ (((𝐴 ↑m (𝐵 ⊔ 𝐶)) ≈ ((𝐴 ↑m ({∅} × 𝐵)) × (𝐴 ↑m ({1o} × 𝐶))) ∧ ((𝐴 ↑m ({∅} × 𝐵)) × (𝐴 ↑m ({1o} × 𝐶))) ≈ ((𝐴 ↑m 𝐵) × (𝐴 ↑m 𝐶))) → (𝐴 ↑m (𝐵 ⊔ 𝐶)) ≈ ((𝐴 ↑m 𝐵) × (𝐴 ↑m 𝐶)))
32	16, 30, 31	syl2anc 586	1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → (𝐴 ↑m (𝐵 ⊔ 𝐶)) ≈ ((𝐴 ↑m 𝐵) × (𝐴 ↑m 𝐶)))

Syntax hints:   → wi 4   ∧ w3a 1082   = wceq 1536   ∈ wcel 2113  Vcvv 3493   ∪ cun 3931   ∩ cin 3932  ∅c0 4288  {csn 4564   class class class wbr 5063   × cxp 5550  Oncon0 6188  (class class class)co 7153  1_oc1o 8092   ↑_m cmap 8403   ≈ cen 8503   ⊔ cdju 9324

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 1969  ax-7 2014  ax-8 2115  ax-9 2123  ax-10 2144  ax-11 2160  ax-12 2176  ax-ext 2792  ax-sep 5200  ax-nul 5207  ax-pow 5263  ax-pr 5327  ax-un 7458

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1083  df-3an 1084  df-tru 1539  df-ex 1780  df-nf 1784  df-sb 2069  df-mo 2621  df-eu 2653  df-clab 2799  df-cleq 2813  df-clel 2892  df-nfc 2962  df-ne 3016  df-ral 3142  df-rex 3143  df-rab 3146  df-v 3495  df-sbc 3771  df-csb 3881  df-dif 3936  df-un 3938  df-in 3940  df-ss 3949  df-pss 3951  df-nul 4289  df-if 4465  df-pw 4538  df-sn 4565  df-pr 4567  df-tp 4569  df-op 4571  df-uni 4836  df-int 4874  df-iun 4918  df-br 5064  df-opab 5126  df-mpt 5144  df-tr 5170  df-id 5457  df-eprel 5462  df-po 5471  df-so 5472  df-fr 5511  df-we 5513  df-xp 5558  df-rel 5559  df-cnv 5560  df-co 5561  df-dm 5562  df-rn 5563  df-res 5564  df-ima 5565  df-ord 6191  df-on 6192  df-suc 6194  df-iota 6311  df-fun 6354  df-fn 6355  df-f 6356  df-f1 6357  df-fo 6358  df-f1o 6359  df-fv 6360  df-ov 7156  df-oprab 7157  df-mpo 7158  df-1st 7686  df-2nd 7687  df-1o 8099  df-er 8286  df-map 8405  df-en 8507  df-dom 8508  df-dju 9327

This theorem is referenced by:  pwdjuen  9604