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Theorem cdjreui 29625
Description: A member of the sum of disjoint subspaces has a unique decomposition. Part of Lemma 5 of [Holland] p. 1520. (Contributed by NM, 20-May-2005.) (New usage is discouraged.)
Hypotheses
Ref Expression
cdjreu.1 𝐴S
cdjreu.2 𝐵S
Assertion
Ref Expression
cdjreui ((𝐶 ∈ (𝐴 + 𝐵) ∧ (𝐴𝐵) = 0) → ∃!𝑥𝐴𝑦𝐵 𝐶 = (𝑥 + 𝑦))
Distinct variable groups:   𝑥,𝑦,𝐴   𝑥,𝐵,𝑦   𝑥,𝐶,𝑦

Proof of Theorem cdjreui
Dummy variables 𝑧 𝑤 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 cdjreu.1 . . . . 5 𝐴S
2 cdjreu.2 . . . . 5 𝐵S
31, 2shseli 28509 . . . 4 (𝐶 ∈ (𝐴 + 𝐵) ↔ ∃𝑥𝐴𝑦𝐵 𝐶 = (𝑥 + 𝑦))
43biimpi 206 . . 3 (𝐶 ∈ (𝐴 + 𝐵) → ∃𝑥𝐴𝑦𝐵 𝐶 = (𝑥 + 𝑦))
5 reeanv 3254 . . . . 5 (∃𝑦𝐵𝑤𝐵 (𝐶 = (𝑥 + 𝑦) ∧ 𝐶 = (𝑧 + 𝑤)) ↔ (∃𝑦𝐵 𝐶 = (𝑥 + 𝑦) ∧ ∃𝑤𝐵 𝐶 = (𝑧 + 𝑤)))
6 eqtr2 2790 . . . . . . 7 ((𝐶 = (𝑥 + 𝑦) ∧ 𝐶 = (𝑧 + 𝑤)) → (𝑥 + 𝑦) = (𝑧 + 𝑤))
71sheli 28405 . . . . . . . . . . . 12 (𝑥𝐴𝑥 ∈ ℋ)
82sheli 28405 . . . . . . . . . . . 12 (𝑦𝐵𝑦 ∈ ℋ)
97, 8anim12i 592 . . . . . . . . . . 11 ((𝑥𝐴𝑦𝐵) → (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ))
101sheli 28405 . . . . . . . . . . . 12 (𝑧𝐴𝑧 ∈ ℋ)
112sheli 28405 . . . . . . . . . . . 12 (𝑤𝐵𝑤 ∈ ℋ)
1210, 11anim12i 592 . . . . . . . . . . 11 ((𝑧𝐴𝑤𝐵) → (𝑧 ∈ ℋ ∧ 𝑤 ∈ ℋ))
13 hvaddsub4 28269 . . . . . . . . . . 11 (((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ (𝑧 ∈ ℋ ∧ 𝑤 ∈ ℋ)) → ((𝑥 + 𝑦) = (𝑧 + 𝑤) ↔ (𝑥 𝑧) = (𝑤 𝑦)))
149, 12, 13syl2an 575 . . . . . . . . . 10 (((𝑥𝐴𝑦𝐵) ∧ (𝑧𝐴𝑤𝐵)) → ((𝑥 + 𝑦) = (𝑧 + 𝑤) ↔ (𝑥 𝑧) = (𝑤 𝑦)))
1514an4s 631 . . . . . . . . 9 (((𝑥𝐴𝑧𝐴) ∧ (𝑦𝐵𝑤𝐵)) → ((𝑥 + 𝑦) = (𝑧 + 𝑤) ↔ (𝑥 𝑧) = (𝑤 𝑦)))
1615adantll 685 . . . . . . . 8 ((((𝐴𝐵) = 0 ∧ (𝑥𝐴𝑧𝐴)) ∧ (𝑦𝐵𝑤𝐵)) → ((𝑥 + 𝑦) = (𝑧 + 𝑤) ↔ (𝑥 𝑧) = (𝑤 𝑦)))
17 shsubcl 28411 . . . . . . . . . . . . . . . 16 ((𝐵S𝑤𝐵𝑦𝐵) → (𝑤 𝑦) ∈ 𝐵)
182, 17mp3an1 1558 . . . . . . . . . . . . . . 15 ((𝑤𝐵𝑦𝐵) → (𝑤 𝑦) ∈ 𝐵)
1918ancoms 455 . . . . . . . . . . . . . 14 ((𝑦𝐵𝑤𝐵) → (𝑤 𝑦) ∈ 𝐵)
20 eleq1 2837 . . . . . . . . . . . . . 14 ((𝑥 𝑧) = (𝑤 𝑦) → ((𝑥 𝑧) ∈ 𝐵 ↔ (𝑤 𝑦) ∈ 𝐵))
2119, 20syl5ibrcom 237 . . . . . . . . . . . . 13 ((𝑦𝐵𝑤𝐵) → ((𝑥 𝑧) = (𝑤 𝑦) → (𝑥 𝑧) ∈ 𝐵))
2221adantl 467 . . . . . . . . . . . 12 (((𝑥𝐴𝑧𝐴) ∧ (𝑦𝐵𝑤𝐵)) → ((𝑥 𝑧) = (𝑤 𝑦) → (𝑥 𝑧) ∈ 𝐵))
23 shsubcl 28411 . . . . . . . . . . . . . 14 ((𝐴S𝑥𝐴𝑧𝐴) → (𝑥 𝑧) ∈ 𝐴)
241, 23mp3an1 1558 . . . . . . . . . . . . 13 ((𝑥𝐴𝑧𝐴) → (𝑥 𝑧) ∈ 𝐴)
2524adantr 466 . . . . . . . . . . . 12 (((𝑥𝐴𝑧𝐴) ∧ (𝑦𝐵𝑤𝐵)) → (𝑥 𝑧) ∈ 𝐴)
2622, 25jctild 509 . . . . . . . . . . 11 (((𝑥𝐴𝑧𝐴) ∧ (𝑦𝐵𝑤𝐵)) → ((𝑥 𝑧) = (𝑤 𝑦) → ((𝑥 𝑧) ∈ 𝐴 ∧ (𝑥 𝑧) ∈ 𝐵)))
2726adantll 685 . . . . . . . . . 10 ((((𝐴𝐵) = 0 ∧ (𝑥𝐴𝑧𝐴)) ∧ (𝑦𝐵𝑤𝐵)) → ((𝑥 𝑧) = (𝑤 𝑦) → ((𝑥 𝑧) ∈ 𝐴 ∧ (𝑥 𝑧) ∈ 𝐵)))
28 elin 3945 . . . . . . . . . . . 12 ((𝑥 𝑧) ∈ (𝐴𝐵) ↔ ((𝑥 𝑧) ∈ 𝐴 ∧ (𝑥 𝑧) ∈ 𝐵))
29 eleq2 2838 . . . . . . . . . . . 12 ((𝐴𝐵) = 0 → ((𝑥 𝑧) ∈ (𝐴𝐵) ↔ (𝑥 𝑧) ∈ 0))
3028, 29syl5bbr 274 . . . . . . . . . . 11 ((𝐴𝐵) = 0 → (((𝑥 𝑧) ∈ 𝐴 ∧ (𝑥 𝑧) ∈ 𝐵) ↔ (𝑥 𝑧) ∈ 0))
3130ad2antrr 697 . . . . . . . . . 10 ((((𝐴𝐵) = 0 ∧ (𝑥𝐴𝑧𝐴)) ∧ (𝑦𝐵𝑤𝐵)) → (((𝑥 𝑧) ∈ 𝐴 ∧ (𝑥 𝑧) ∈ 𝐵) ↔ (𝑥 𝑧) ∈ 0))
3227, 31sylibd 229 . . . . . . . . 9 ((((𝐴𝐵) = 0 ∧ (𝑥𝐴𝑧𝐴)) ∧ (𝑦𝐵𝑤𝐵)) → ((𝑥 𝑧) = (𝑤 𝑦) → (𝑥 𝑧) ∈ 0))
33 elch0 28445 . . . . . . . . . . . 12 ((𝑥 𝑧) ∈ 0 ↔ (𝑥 𝑧) = 0)
34 hvsubeq0 28259 . . . . . . . . . . . 12 ((𝑥 ∈ ℋ ∧ 𝑧 ∈ ℋ) → ((𝑥 𝑧) = 0𝑥 = 𝑧))
3533, 34syl5bb 272 . . . . . . . . . . 11 ((𝑥 ∈ ℋ ∧ 𝑧 ∈ ℋ) → ((𝑥 𝑧) ∈ 0𝑥 = 𝑧))
367, 10, 35syl2an 575 . . . . . . . . . 10 ((𝑥𝐴𝑧𝐴) → ((𝑥 𝑧) ∈ 0𝑥 = 𝑧))
3736ad2antlr 698 . . . . . . . . 9 ((((𝐴𝐵) = 0 ∧ (𝑥𝐴𝑧𝐴)) ∧ (𝑦𝐵𝑤𝐵)) → ((𝑥 𝑧) ∈ 0𝑥 = 𝑧))
3832, 37sylibd 229 . . . . . . . 8 ((((𝐴𝐵) = 0 ∧ (𝑥𝐴𝑧𝐴)) ∧ (𝑦𝐵𝑤𝐵)) → ((𝑥 𝑧) = (𝑤 𝑦) → 𝑥 = 𝑧))
3916, 38sylbid 230 . . . . . . 7 ((((𝐴𝐵) = 0 ∧ (𝑥𝐴𝑧𝐴)) ∧ (𝑦𝐵𝑤𝐵)) → ((𝑥 + 𝑦) = (𝑧 + 𝑤) → 𝑥 = 𝑧))
406, 39syl5 34 . . . . . 6 ((((𝐴𝐵) = 0 ∧ (𝑥𝐴𝑧𝐴)) ∧ (𝑦𝐵𝑤𝐵)) → ((𝐶 = (𝑥 + 𝑦) ∧ 𝐶 = (𝑧 + 𝑤)) → 𝑥 = 𝑧))
4140rexlimdvva 3185 . . . . 5 (((𝐴𝐵) = 0 ∧ (𝑥𝐴𝑧𝐴)) → (∃𝑦𝐵𝑤𝐵 (𝐶 = (𝑥 + 𝑦) ∧ 𝐶 = (𝑧 + 𝑤)) → 𝑥 = 𝑧))
425, 41syl5bir 233 . . . 4 (((𝐴𝐵) = 0 ∧ (𝑥𝐴𝑧𝐴)) → ((∃𝑦𝐵 𝐶 = (𝑥 + 𝑦) ∧ ∃𝑤𝐵 𝐶 = (𝑧 + 𝑤)) → 𝑥 = 𝑧))
4342ralrimivva 3119 . . 3 ((𝐴𝐵) = 0 → ∀𝑥𝐴𝑧𝐴 ((∃𝑦𝐵 𝐶 = (𝑥 + 𝑦) ∧ ∃𝑤𝐵 𝐶 = (𝑧 + 𝑤)) → 𝑥 = 𝑧))
444, 43anim12i 592 . 2 ((𝐶 ∈ (𝐴 + 𝐵) ∧ (𝐴𝐵) = 0) → (∃𝑥𝐴𝑦𝐵 𝐶 = (𝑥 + 𝑦) ∧ ∀𝑥𝐴𝑧𝐴 ((∃𝑦𝐵 𝐶 = (𝑥 + 𝑦) ∧ ∃𝑤𝐵 𝐶 = (𝑧 + 𝑤)) → 𝑥 = 𝑧)))
45 oveq1 6799 . . . . . 6 (𝑥 = 𝑧 → (𝑥 + 𝑦) = (𝑧 + 𝑦))
4645eqeq2d 2780 . . . . 5 (𝑥 = 𝑧 → (𝐶 = (𝑥 + 𝑦) ↔ 𝐶 = (𝑧 + 𝑦)))
4746rexbidv 3199 . . . 4 (𝑥 = 𝑧 → (∃𝑦𝐵 𝐶 = (𝑥 + 𝑦) ↔ ∃𝑦𝐵 𝐶 = (𝑧 + 𝑦)))
48 oveq2 6800 . . . . . 6 (𝑦 = 𝑤 → (𝑧 + 𝑦) = (𝑧 + 𝑤))
4948eqeq2d 2780 . . . . 5 (𝑦 = 𝑤 → (𝐶 = (𝑧 + 𝑦) ↔ 𝐶 = (𝑧 + 𝑤)))
5049cbvrexv 3320 . . . 4 (∃𝑦𝐵 𝐶 = (𝑧 + 𝑦) ↔ ∃𝑤𝐵 𝐶 = (𝑧 + 𝑤))
5147, 50syl6bb 276 . . 3 (𝑥 = 𝑧 → (∃𝑦𝐵 𝐶 = (𝑥 + 𝑦) ↔ ∃𝑤𝐵 𝐶 = (𝑧 + 𝑤)))
5251reu4 3550 . 2 (∃!𝑥𝐴𝑦𝐵 𝐶 = (𝑥 + 𝑦) ↔ (∃𝑥𝐴𝑦𝐵 𝐶 = (𝑥 + 𝑦) ∧ ∀𝑥𝐴𝑧𝐴 ((∃𝑦𝐵 𝐶 = (𝑥 + 𝑦) ∧ ∃𝑤𝐵 𝐶 = (𝑧 + 𝑤)) → 𝑥 = 𝑧)))
5344, 52sylibr 224 1 ((𝐶 ∈ (𝐴 + 𝐵) ∧ (𝐴𝐵) = 0) → ∃!𝑥𝐴𝑦𝐵 𝐶 = (𝑥 + 𝑦))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 382   = wceq 1630  wcel 2144  wral 3060  wrex 3061  ∃!wreu 3062  cin 3720  (class class class)co 6792  chil 28110   + cva 28111  0c0v 28115   cmv 28116   S csh 28119   + cph 28122  0c0h 28126
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1869  ax-4 1884  ax-5 1990  ax-6 2056  ax-7 2092  ax-8 2146  ax-9 2153  ax-10 2173  ax-11 2189  ax-12 2202  ax-13 2407  ax-ext 2750  ax-rep 4902  ax-sep 4912  ax-nul 4920  ax-pow 4971  ax-pr 5034  ax-un 7095  ax-resscn 10194  ax-1cn 10195  ax-icn 10196  ax-addcl 10197  ax-addrcl 10198  ax-mulcl 10199  ax-mulrcl 10200  ax-mulcom 10201  ax-addass 10202  ax-mulass 10203  ax-distr 10204  ax-i2m1 10205  ax-1ne0 10206  ax-1rid 10207  ax-rnegex 10208  ax-rrecex 10209  ax-cnre 10210  ax-pre-lttri 10211  ax-pre-lttrn 10212  ax-pre-ltadd 10213  ax-pre-mulgt0 10214  ax-hilex 28190  ax-hfvadd 28191  ax-hvcom 28192  ax-hvass 28193  ax-hv0cl 28194  ax-hvaddid 28195  ax-hfvmul 28196  ax-hvmulid 28197  ax-hvmulass 28198  ax-hvdistr1 28199  ax-hvdistr2 28200  ax-hvmul0 28201
This theorem depends on definitions:  df-bi 197  df-an 383  df-or 827  df-3or 1071  df-3an 1072  df-tru 1633  df-ex 1852  df-nf 1857  df-sb 2049  df-eu 2621  df-mo 2622  df-clab 2757  df-cleq 2763  df-clel 2766  df-nfc 2901  df-ne 2943  df-nel 3046  df-ral 3065  df-rex 3066  df-reu 3067  df-rmo 3068  df-rab 3069  df-v 3351  df-sbc 3586  df-csb 3681  df-dif 3724  df-un 3726  df-in 3728  df-ss 3735  df-nul 4062  df-if 4224  df-pw 4297  df-sn 4315  df-pr 4317  df-op 4321  df-uni 4573  df-iun 4654  df-br 4785  df-opab 4845  df-mpt 4862  df-id 5157  df-po 5170  df-so 5171  df-xp 5255  df-rel 5256  df-cnv 5257  df-co 5258  df-dm 5259  df-rn 5260  df-res 5261  df-ima 5262  df-iota 5994  df-fun 6033  df-fn 6034  df-f 6035  df-f1 6036  df-fo 6037  df-f1o 6038  df-fv 6039  df-riota 6753  df-ov 6795  df-oprab 6796  df-mpt2 6797  df-er 7895  df-en 8109  df-dom 8110  df-sdom 8111  df-pnf 10277  df-mnf 10278  df-xr 10279  df-ltxr 10280  df-le 10281  df-sub 10469  df-neg 10470  df-div 10886  df-grpo 27681  df-ablo 27733  df-hvsub 28162  df-sh 28398  df-ch0 28444  df-shs 28501
This theorem is referenced by:  cdj3lem2  29628
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