Theorem mapdjuen 9599

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 9323	. . . 4 ⊢ (𝐵 ⊔ 𝐶) = (({∅} × 𝐵) ∪ ({1o} × 𝐶))
2	1	oveq2i 7160	. . 3 ⊢ (𝐴 ↑m (𝐵 ⊔ 𝐶)) = (𝐴 ↑m (({∅} × 𝐵) ∪ ({1o} × 𝐶)))
3		snex 5325	. . . . 5 ⊢ {∅} ∈ V
4		simp2 1132	. . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → 𝐵 ∈ 𝑊)
5		xpexg 7466	. . . . 5 ⊢ (({∅} ∈ V ∧ 𝐵 ∈ 𝑊) → ({∅} × 𝐵) ∈ V)
6	3, 4, 5	sylancr 589	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → ({∅} × 𝐵) ∈ V)
7		snex 5325	. . . . 5 ⊢ {1o} ∈ V
8		simp3 1133	. . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → 𝐶 ∈ 𝑋)
9		xpexg 7466	. . . . 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 8114	. . . . 5 ⊢ (({∅} × 𝐵) ∩ ({1o} × 𝐶)) = ∅
13	12	a1i 11	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → (({∅} × 𝐵) ∩ ({1o} × 𝐶)) = ∅)
14		mapunen 8679	. . . 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 5094	. 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → (𝐴 ↑m (𝐵 ⊔ 𝐶)) ≈ ((𝐴 ↑m ({∅} × 𝐵)) × (𝐴 ↑m ({1o} × 𝐶))))
17		enrefg 8534	. . . . 5 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ≈ 𝐴)
18	11, 17	syl 17	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → 𝐴 ≈ 𝐴)
19		0ex 5204	. . . . 5 ⊢ ∅ ∈ V
20		xpsnen2g 8603	. . . . 5 ⊢ ((∅ ∈ V ∧ 𝐵 ∈ 𝑊) → ({∅} × 𝐵) ≈ 𝐵)
21	19, 4, 20	sylancr 589	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑋) → ({∅} × 𝐵) ≈ 𝐵)
22		mapen 8674	. . . 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 8102	. . . . 5 ⊢ 1o ∈ On
25		xpsnen2g 8603	. . . . 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 8674	. . . 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 8673	. . 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 8554	. 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 3491   ∪ cun 3927   ∩ cin 3928  ∅c0 4284  {csn 4560   class class class wbr 5059   × cxp 5546  Oncon0 6184  (class class class)co 7149  1_oc1o 8088   ↑_m cmap 8399   ≈ cen 8499   ⊔ cdju 9320

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 5196  ax-nul 5203  ax-pow 5259  ax-pr 5323  ax-un 7454

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 3493  df-sbc 3769  df-csb 3877  df-dif 3932  df-un 3934  df-in 3936  df-ss 3945  df-pss 3947  df-nul 4285  df-if 4461  df-pw 4534  df-sn 4561  df-pr 4563  df-tp 4565  df-op 4567  df-uni 4832  df-int 4870  df-iun 4914  df-br 5060  df-opab 5122  df-mpt 5140  df-tr 5166  df-id 5453  df-eprel 5458  df-po 5467  df-so 5468  df-fr 5507  df-we 5509  df-xp 5554  df-rel 5555  df-cnv 5556  df-co 5557  df-dm 5558  df-rn 5559  df-res 5560  df-ima 5561  df-ord 6187  df-on 6188  df-suc 6190  df-iota 6307  df-fun 6350  df-fn 6351  df-f 6352  df-f1 6353  df-fo 6354  df-f1o 6355  df-fv 6356  df-ov 7152  df-oprab 7153  df-mpo 7154  df-1st 7682  df-2nd 7683  df-1o 8095  df-er 8282  df-map 8401  df-en 8503  df-dom 8504  df-dju 9323

This theorem is referenced by:  pwdjuen  9600