Theorem axlowdimlem8 28929

Description: Lemma for axlowdim 28941. 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 6829	. 2 ⊢ (𝑃‘3) = (({⟨3, -1⟩} ∪ (((1...𝑁) ∖ {3}) × {0}))‘3)
3		3ex 12214	. . . 4 ⊢ 3 ∈ V
4		negex 11365	. . . 4 ⊢ -1 ∈ V
5	3, 4	fnsn 6544	. . 3 ⊢ {⟨3, -1⟩} Fn {3}
6		c0ex 11113	. . . . 5 ⊢ 0 ∈ V
7	6	fconst 6714	. . . 4 ⊢ (((1...𝑁) ∖ {3}) × {0}):((1...𝑁) ∖ {3})⟶{0}
8		ffn 6656	. . . 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 4421	. . . 4 ⊢ ({3} ∩ ((1...𝑁) ∖ {3})) = ∅
11	3	snid 4614	. . . 4 ⊢ 3 ∈ {3}
12	10, 11	pm3.2i 470	. . 3 ⊢ (({3} ∩ ((1...𝑁) ∖ {3})) = ∅ ∧ 3 ∈ {3})
13		fvun1 6919	. . 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 1463	. 2 ⊢ (({⟨3, -1⟩} ∪ (((1...𝑁) ∖ {3}) × {0}))‘3) = ({⟨3, -1⟩}‘3)
15	3, 4	fvsn 7121	. 2 ⊢ ({⟨3, -1⟩}‘3) = -1
16	2, 14, 15	3eqtri 2760	1 ⊢ (𝑃‘3) = -1

Syntax hints:   ∧ wa 395   = wceq 1541   ∈ wcel 2113   ∖ cdif 3895   ∪ cun 3896   ∩ cin 3897  ∅c0 4282  {csn 4575  ⟨cop 4581   × cxp 5617   Fn wfn 6481  ⟶wf 6482  ‘cfv 6486  (class class class)co 7352  0cc0 11013  1c1 11014  -cneg 11352  3c3 12188  ...cfz 13409

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2182  ax-ext 2705  ax-sep 5236  ax-nul 5246  ax-pr 5372  ax-1cn 11071  ax-icn 11072  ax-addcl 11073  ax-mulcl 11075  ax-i2m1 11081

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2537  df-eu 2566  df-clab 2712  df-cleq 2725  df-clel 2808  df-nfc 2882  df-ne 2930  df-ral 3049  df-rex 3058  df-rab 3397  df-v 3439  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-nul 4283  df-if 4475  df-sn 4576  df-pr 4578  df-op 4582  df-uni 4859  df-br 5094  df-opab 5156  df-mpt 5175  df-id 5514  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-res 5631  df-ima 5632  df-iota 6442  df-fun 6488  df-fn 6489  df-f 6490  df-fv 6494  df-ov 7355  df-neg 11354  df-2 12195  df-3 12196

This theorem is referenced by:  axlowdimlem16  28937