Theorem axlowdimlem8 29034

Description: Lemma for axlowdim 29046. Calculate the value of 𝑃 at three. (Contributed by Scott Fenton, 21-Apr-2013.)

Hypothesis

Ref	Expression
axlowdimlem7.1	⊢ 𝑃 = ({⟨3, -1⟩} ∪ (((1...𝑁) ∖ {3}) × {0}))

Assertion

Ref	Expression
axlowdimlem8	⊢ (𝑃‘3) = -1

Proof of Theorem axlowdimlem8

Step	Hyp	Ref	Expression
1		axlowdimlem7.1	. . 3 ⊢ 𝑃 = ({⟨3, -1⟩} ∪ (((1...𝑁) ∖ {3}) × {0}))
2	1	fveq1i 6843	. 2 ⊢ (𝑃‘3) = (({⟨3, -1⟩} ∪ (((1...𝑁) ∖ {3}) × {0}))‘3)
3		3ex 12239	. . . 4 ⊢ 3 ∈ V
4		negex 11390	. . . 4 ⊢ -1 ∈ V
5	3, 4	fnsn 6558	. . 3 ⊢ {⟨3, -1⟩} Fn {3}
6		c0ex 11138	. . . . 5 ⊢ 0 ∈ V
7	6	fconst 6728	. . . 4 ⊢ (((1...𝑁) ∖ {3}) × {0}):((1...𝑁) ∖ {3})⟶{0}
8		ffn 6670	. . . 4 ⊢ ((((1...𝑁) ∖ {3}) × {0}):((1...𝑁) ∖ {3})⟶{0} → (((1...𝑁) ∖ {3}) × {0}) Fn ((1...𝑁) ∖ {3}))
9	7, 8	ax-mp 5	. . 3 ⊢ (((1...𝑁) ∖ {3}) × {0}) Fn ((1...𝑁) ∖ {3})
10		disjdif 4426	. . . 4 ⊢ ({3} ∩ ((1...𝑁) ∖ {3})) = ∅
11	3	snid 4621	. . . 4 ⊢ 3 ∈ {3}
12	10, 11	pm3.2i 470	. . 3 ⊢ (({3} ∩ ((1...𝑁) ∖ {3})) = ∅ ∧ 3 ∈ {3})
13		fvun1 6933	. . 3 ⊢ (({⟨3, -1⟩} Fn {3} ∧ (((1...𝑁) ∖ {3}) × {0}) Fn ((1...𝑁) ∖ {3}) ∧ (({3} ∩ ((1...𝑁) ∖ {3})) = ∅ ∧ 3 ∈ {3})) → (({⟨3, -1⟩} ∪ (((1...𝑁) ∖ {3}) × {0}))‘3) = ({⟨3, -1⟩}‘3))
14	5, 9, 12, 13	mp3an 1464	. 2 ⊢ (({⟨3, -1⟩} ∪ (((1...𝑁) ∖ {3}) × {0}))‘3) = ({⟨3, -1⟩}‘3)
15	3, 4	fvsn 7137	. 2 ⊢ ({⟨3, -1⟩}‘3) = -1
16	2, 14, 15	3eqtri 2764	1 ⊢ (𝑃‘3) = -1

Syntax hints:   ∧ wa 395   = wceq 1542   ∈ wcel 2114   ∖ cdif 3900   ∪ cun 3901   ∩ cin 3902  ∅c0 4287  {csn 4582  ⟨cop 4588   × cxp 5630   Fn wfn 6495  ⟶wf 6496  ‘cfv 6500  (class class class)co 7368  0cc0 11038  1c1 11039  -cneg 11377  3c3 12213  ...cfz 13435

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-sep 5243  ax-nul 5253  ax-pr 5379  ax-1cn 11096  ax-icn 11097  ax-addcl 11098  ax-mulcl 11100  ax-i2m1 11106

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3063  df-rab 3402  df-v 3444  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4288  df-if 4482  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-br 5101  df-opab 5163  df-mpt 5182  df-id 5527  df-xp 5638  df-rel 5639  df-cnv 5640  df-co 5641  df-dm 5642  df-rn 5643  df-res 5644  df-ima 5645  df-iota 6456  df-fun 6502  df-fn 6503  df-f 6504  df-fv 6508  df-ov 7371  df-neg 11379  df-2 12220  df-3 12221

This theorem is referenced by:  axlowdimlem16  29042