Theorem axlowdimlem8 26418

Description: Lemma for axlowdim 26430. 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 6539	. 2 ⊢ (𝑃‘3) = (({⟨3, -1⟩} ∪ (((1...𝑁) ∖ {3}) × {0}))‘3)
3		3ex 11567	. . . 4 ⊢ 3 ∈ V
4		negex 10731	. . . 4 ⊢ -1 ∈ V
5	3, 4	fnsn 6282	. . 3 ⊢ {⟨3, -1⟩} Fn {3}
6		c0ex 10481	. . . . 5 ⊢ 0 ∈ V
7	6	fconst 6433	. . . 4 ⊢ (((1...𝑁) ∖ {3}) × {0}):((1...𝑁) ∖ {3})⟶{0}
8		ffn 6382	. . . 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 4335	. . . 4 ⊢ ({3} ∩ ((1...𝑁) ∖ {3})) = ∅
11	3	snid 4506	. . . 4 ⊢ 3 ∈ {3}
12	10, 11	pm3.2i 471	. . 3 ⊢ (({3} ∩ ((1...𝑁) ∖ {3})) = ∅ ∧ 3 ∈ {3})
13		fvun1 6621	. . 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 1453	. 2 ⊢ (({⟨3, -1⟩} ∪ (((1...𝑁) ∖ {3}) × {0}))‘3) = ({⟨3, -1⟩}‘3)
15	3, 4	fvsn 6806	. 2 ⊢ ({⟨3, -1⟩}‘3) = -1
16	2, 14, 15	3eqtri 2823	1 ⊢ (𝑃‘3) = -1

Syntax hints:   ∧ wa 396   = wceq 1522   ∈ wcel 2081   ∖ cdif 3856   ∪ cun 3857   ∩ cin 3858  ∅c0 4211  {csn 4472  ⟨cop 4478   × cxp 5441   Fn wfn 6220  ⟶wf 6221  ‘cfv 6225  (class class class)co 7016  0cc0 10383  1c1 10384  -cneg 10718  3c3 11541  ...cfz 12742

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1777  ax-4 1791  ax-5 1888  ax-6 1947  ax-7 1992  ax-8 2083  ax-9 2091  ax-10 2112  ax-11 2126  ax-12 2141  ax-13 2344  ax-ext 2769  ax-sep 5094  ax-nul 5101  ax-pow 5157  ax-pr 5221  ax-1cn 10441  ax-icn 10442  ax-addcl 10443  ax-mulcl 10445  ax-i2m1 10451

This theorem depends on definitions:  df-bi 208  df-an 397  df-or 843  df-3an 1082  df-tru 1525  df-ex 1762  df-nf 1766  df-sb 2043  df-mo 2576  df-eu 2612  df-clab 2776  df-cleq 2788  df-clel 2863  df-nfc 2935  df-ne 2985  df-ral 3110  df-rex 3111  df-rab 3114  df-v 3439  df-sbc 3707  df-dif 3862  df-un 3864  df-in 3866  df-ss 3874  df-nul 4212  df-if 4382  df-sn 4473  df-pr 4475  df-op 4479  df-uni 4746  df-br 4963  df-opab 5025  df-mpt 5042  df-id 5348  df-xp 5449  df-rel 5450  df-cnv 5451  df-co 5452  df-dm 5453  df-rn 5454  df-res 5455  df-ima 5456  df-iota 6189  df-fun 6227  df-fn 6228  df-f 6229  df-fv 6233  df-ov 7019  df-neg 10720  df-2 11548  df-3 11549

This theorem is referenced by:  axlowdimlem16  26426