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Theorem cdj3lem2b 29142
Description: Lemma for cdj3i 29146. The first-component function 𝑆 is bounded if the subspaces are completely disjoint. (Contributed by NM, 26-May-2005.) (New usage is discouraged.)
Hypotheses
Ref Expression
cdj3lem2.1 𝐴S
cdj3lem2.2 𝐵S
cdj3lem2.3 𝑆 = (𝑥 ∈ (𝐴 + 𝐵) ↦ (𝑧𝐴𝑤𝐵 𝑥 = (𝑧 + 𝑤)))
Assertion
Ref Expression
cdj3lem2b (∃𝑣 ∈ ℝ (0 < 𝑣 ∧ ∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦)))) → ∃𝑣 ∈ ℝ (0 < 𝑣 ∧ ∀𝑢 ∈ (𝐴 + 𝐵)(norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢))))
Distinct variable groups:   𝑥,𝑦,𝑧,𝑤,𝑣,𝑢,𝐴   𝑥,𝐵,𝑦,𝑧,𝑤,𝑣,𝑢   𝑣,𝑆,𝑢
Allowed substitution hints:   𝑆(𝑥,𝑦,𝑧,𝑤)

Proof of Theorem cdj3lem2b
Dummy variables 𝑡 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 cdj3lem2.1 . . 3 𝐴S
2 cdj3lem2.2 . . 3 𝐵S
31, 2cdj3lem1 29139 . 2 (∃𝑣 ∈ ℝ (0 < 𝑣 ∧ ∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦)))) → (𝐴𝐵) = 0)
41, 2shseli 28021 . . . . . . . 8 (𝑢 ∈ (𝐴 + 𝐵) ↔ ∃𝑡𝐴𝐵 𝑢 = (𝑡 + ))
54biimpi 206 . . . . . . 7 (𝑢 ∈ (𝐴 + 𝐵) → ∃𝑡𝐴𝐵 𝑢 = (𝑡 + ))
6 fveq2 6148 . . . . . . . . . . . . . 14 (𝑥 = 𝑡 → (norm𝑥) = (norm𝑡))
76oveq1d 6619 . . . . . . . . . . . . 13 (𝑥 = 𝑡 → ((norm𝑥) + (norm𝑦)) = ((norm𝑡) + (norm𝑦)))
8 oveq1 6611 . . . . . . . . . . . . . . 15 (𝑥 = 𝑡 → (𝑥 + 𝑦) = (𝑡 + 𝑦))
98fveq2d 6152 . . . . . . . . . . . . . 14 (𝑥 = 𝑡 → (norm‘(𝑥 + 𝑦)) = (norm‘(𝑡 + 𝑦)))
109oveq2d 6620 . . . . . . . . . . . . 13 (𝑥 = 𝑡 → (𝑣 · (norm‘(𝑥 + 𝑦))) = (𝑣 · (norm‘(𝑡 + 𝑦))))
117, 10breq12d 4626 . . . . . . . . . . . 12 (𝑥 = 𝑡 → (((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) ↔ ((norm𝑡) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑡 + 𝑦)))))
12 fveq2 6148 . . . . . . . . . . . . . 14 (𝑦 = → (norm𝑦) = (norm))
1312oveq2d 6620 . . . . . . . . . . . . 13 (𝑦 = → ((norm𝑡) + (norm𝑦)) = ((norm𝑡) + (norm)))
14 oveq2 6612 . . . . . . . . . . . . . . 15 (𝑦 = → (𝑡 + 𝑦) = (𝑡 + ))
1514fveq2d 6152 . . . . . . . . . . . . . 14 (𝑦 = → (norm‘(𝑡 + 𝑦)) = (norm‘(𝑡 + )))
1615oveq2d 6620 . . . . . . . . . . . . 13 (𝑦 = → (𝑣 · (norm‘(𝑡 + 𝑦))) = (𝑣 · (norm‘(𝑡 + ))))
1713, 16breq12d 4626 . . . . . . . . . . . 12 (𝑦 = → (((norm𝑡) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑡 + 𝑦))) ↔ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))))
1811, 17rspc2v 3306 . . . . . . . . . . 11 ((𝑡𝐴𝐵) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))))
19 cdj3lem2.3 . . . . . . . . . . . . . . . . . 18 𝑆 = (𝑥 ∈ (𝐴 + 𝐵) ↦ (𝑧𝐴𝑤𝐵 𝑥 = (𝑧 + 𝑤)))
201, 2, 19cdj3lem2 29140 . . . . . . . . . . . . . . . . 17 ((𝑡𝐴𝐵 ∧ (𝐴𝐵) = 0) → (𝑆‘(𝑡 + )) = 𝑡)
21203expa 1262 . . . . . . . . . . . . . . . 16 (((𝑡𝐴𝐵) ∧ (𝐴𝐵) = 0) → (𝑆‘(𝑡 + )) = 𝑡)
2221fveq2d 6152 . . . . . . . . . . . . . . 15 (((𝑡𝐴𝐵) ∧ (𝐴𝐵) = 0) → (norm‘(𝑆‘(𝑡 + ))) = (norm𝑡))
2322ad2ant2r 782 . . . . . . . . . . . . . 14 ((((𝑡𝐴𝐵) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) ∧ ((𝐴𝐵) = 0𝑣 ∈ ℝ)) → (norm‘(𝑆‘(𝑡 + ))) = (norm𝑡))
242sheli 27917 . . . . . . . . . . . . . . . . . . . . . 22 (𝐵 ∈ ℋ)
25 normge0 27829 . . . . . . . . . . . . . . . . . . . . . 22 ( ∈ ℋ → 0 ≤ (norm))
2624, 25syl 17 . . . . . . . . . . . . . . . . . . . . 21 (𝐵 → 0 ≤ (norm))
2726adantl 482 . . . . . . . . . . . . . . . . . . . 20 ((𝑡𝐴𝐵) → 0 ≤ (norm))
281sheli 27917 . . . . . . . . . . . . . . . . . . . . . 22 (𝑡𝐴𝑡 ∈ ℋ)
29 normcl 27828 . . . . . . . . . . . . . . . . . . . . . 22 (𝑡 ∈ ℋ → (norm𝑡) ∈ ℝ)
3028, 29syl 17 . . . . . . . . . . . . . . . . . . . . 21 (𝑡𝐴 → (norm𝑡) ∈ ℝ)
31 normcl 27828 . . . . . . . . . . . . . . . . . . . . . 22 ( ∈ ℋ → (norm) ∈ ℝ)
3224, 31syl 17 . . . . . . . . . . . . . . . . . . . . 21 (𝐵 → (norm) ∈ ℝ)
33 addge01 10482 . . . . . . . . . . . . . . . . . . . . 21 (((norm𝑡) ∈ ℝ ∧ (norm) ∈ ℝ) → (0 ≤ (norm) ↔ (norm𝑡) ≤ ((norm𝑡) + (norm))))
3430, 32, 33syl2an 494 . . . . . . . . . . . . . . . . . . . 20 ((𝑡𝐴𝐵) → (0 ≤ (norm) ↔ (norm𝑡) ≤ ((norm𝑡) + (norm))))
3527, 34mpbid 222 . . . . . . . . . . . . . . . . . . 19 ((𝑡𝐴𝐵) → (norm𝑡) ≤ ((norm𝑡) + (norm)))
3635adantr 481 . . . . . . . . . . . . . . . . . 18 (((𝑡𝐴𝐵) ∧ 𝑣 ∈ ℝ) → (norm𝑡) ≤ ((norm𝑡) + (norm)))
3730ad2antrr 761 . . . . . . . . . . . . . . . . . . 19 (((𝑡𝐴𝐵) ∧ 𝑣 ∈ ℝ) → (norm𝑡) ∈ ℝ)
38 readdcl 9963 . . . . . . . . . . . . . . . . . . . . 21 (((norm𝑡) ∈ ℝ ∧ (norm) ∈ ℝ) → ((norm𝑡) + (norm)) ∈ ℝ)
3930, 32, 38syl2an 494 . . . . . . . . . . . . . . . . . . . 20 ((𝑡𝐴𝐵) → ((norm𝑡) + (norm)) ∈ ℝ)
4039adantr 481 . . . . . . . . . . . . . . . . . . 19 (((𝑡𝐴𝐵) ∧ 𝑣 ∈ ℝ) → ((norm𝑡) + (norm)) ∈ ℝ)
41 hvaddcl 27715 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝑡 ∈ ℋ ∧ ∈ ℋ) → (𝑡 + ) ∈ ℋ)
4228, 24, 41syl2an 494 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑡𝐴𝐵) → (𝑡 + ) ∈ ℋ)
43 normcl 27828 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑡 + ) ∈ ℋ → (norm‘(𝑡 + )) ∈ ℝ)
4442, 43syl 17 . . . . . . . . . . . . . . . . . . . . 21 ((𝑡𝐴𝐵) → (norm‘(𝑡 + )) ∈ ℝ)
45 remulcl 9965 . . . . . . . . . . . . . . . . . . . . 21 ((𝑣 ∈ ℝ ∧ (norm‘(𝑡 + )) ∈ ℝ) → (𝑣 · (norm‘(𝑡 + ))) ∈ ℝ)
4644, 45sylan2 491 . . . . . . . . . . . . . . . . . . . 20 ((𝑣 ∈ ℝ ∧ (𝑡𝐴𝐵)) → (𝑣 · (norm‘(𝑡 + ))) ∈ ℝ)
4746ancoms 469 . . . . . . . . . . . . . . . . . . 19 (((𝑡𝐴𝐵) ∧ 𝑣 ∈ ℝ) → (𝑣 · (norm‘(𝑡 + ))) ∈ ℝ)
48 letr 10075 . . . . . . . . . . . . . . . . . . 19 (((norm𝑡) ∈ ℝ ∧ ((norm𝑡) + (norm)) ∈ ℝ ∧ (𝑣 · (norm‘(𝑡 + ))) ∈ ℝ) → (((norm𝑡) ≤ ((norm𝑡) + (norm)) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) → (norm𝑡) ≤ (𝑣 · (norm‘(𝑡 + )))))
4937, 40, 47, 48syl3anc 1323 . . . . . . . . . . . . . . . . . 18 (((𝑡𝐴𝐵) ∧ 𝑣 ∈ ℝ) → (((norm𝑡) ≤ ((norm𝑡) + (norm)) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) → (norm𝑡) ≤ (𝑣 · (norm‘(𝑡 + )))))
5036, 49mpand 710 . . . . . . . . . . . . . . . . 17 (((𝑡𝐴𝐵) ∧ 𝑣 ∈ ℝ) → (((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + ))) → (norm𝑡) ≤ (𝑣 · (norm‘(𝑡 + )))))
5150imp 445 . . . . . . . . . . . . . . . 16 ((((𝑡𝐴𝐵) ∧ 𝑣 ∈ ℝ) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) → (norm𝑡) ≤ (𝑣 · (norm‘(𝑡 + ))))
5251an32s 845 . . . . . . . . . . . . . . 15 ((((𝑡𝐴𝐵) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) ∧ 𝑣 ∈ ℝ) → (norm𝑡) ≤ (𝑣 · (norm‘(𝑡 + ))))
5352adantrl 751 . . . . . . . . . . . . . 14 ((((𝑡𝐴𝐵) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) ∧ ((𝐴𝐵) = 0𝑣 ∈ ℝ)) → (norm𝑡) ≤ (𝑣 · (norm‘(𝑡 + ))))
5423, 53eqbrtrd 4635 . . . . . . . . . . . . 13 ((((𝑡𝐴𝐵) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) ∧ ((𝐴𝐵) = 0𝑣 ∈ ℝ)) → (norm‘(𝑆‘(𝑡 + ))) ≤ (𝑣 · (norm‘(𝑡 + ))))
55 fveq2 6148 . . . . . . . . . . . . . . 15 (𝑢 = (𝑡 + ) → (𝑆𝑢) = (𝑆‘(𝑡 + )))
5655fveq2d 6152 . . . . . . . . . . . . . 14 (𝑢 = (𝑡 + ) → (norm‘(𝑆𝑢)) = (norm‘(𝑆‘(𝑡 + ))))
57 fveq2 6148 . . . . . . . . . . . . . . 15 (𝑢 = (𝑡 + ) → (norm𝑢) = (norm‘(𝑡 + )))
5857oveq2d 6620 . . . . . . . . . . . . . 14 (𝑢 = (𝑡 + ) → (𝑣 · (norm𝑢)) = (𝑣 · (norm‘(𝑡 + ))))
5956, 58breq12d 4626 . . . . . . . . . . . . 13 (𝑢 = (𝑡 + ) → ((norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢)) ↔ (norm‘(𝑆‘(𝑡 + ))) ≤ (𝑣 · (norm‘(𝑡 + )))))
6054, 59syl5ibrcom 237 . . . . . . . . . . . 12 ((((𝑡𝐴𝐵) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) ∧ ((𝐴𝐵) = 0𝑣 ∈ ℝ)) → (𝑢 = (𝑡 + ) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢))))
6160exp31 629 . . . . . . . . . . 11 ((𝑡𝐴𝐵) → (((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + ))) → (((𝐴𝐵) = 0𝑣 ∈ ℝ) → (𝑢 = (𝑡 + ) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢))))))
6218, 61syld 47 . . . . . . . . . 10 ((𝑡𝐴𝐵) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → (((𝐴𝐵) = 0𝑣 ∈ ℝ) → (𝑢 = (𝑡 + ) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢))))))
6362com14 96 . . . . . . . . 9 (𝑢 = (𝑡 + ) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → (((𝐴𝐵) = 0𝑣 ∈ ℝ) → ((𝑡𝐴𝐵) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢))))))
6463com4t 93 . . . . . . . 8 (((𝐴𝐵) = 0𝑣 ∈ ℝ) → ((𝑡𝐴𝐵) → (𝑢 = (𝑡 + ) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢))))))
6564rexlimdvv 3030 . . . . . . 7 (((𝐴𝐵) = 0𝑣 ∈ ℝ) → (∃𝑡𝐴𝐵 𝑢 = (𝑡 + ) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢)))))
665, 65syl5com 31 . . . . . 6 (𝑢 ∈ (𝐴 + 𝐵) → (((𝐴𝐵) = 0𝑣 ∈ ℝ) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢)))))
6766com3l 89 . . . . 5 (((𝐴𝐵) = 0𝑣 ∈ ℝ) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → (𝑢 ∈ (𝐴 + 𝐵) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢)))))
6867ralrimdv 2962 . . . 4 (((𝐴𝐵) = 0𝑣 ∈ ℝ) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → ∀𝑢 ∈ (𝐴 + 𝐵)(norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢))))
6968anim2d 588 . . 3 (((𝐴𝐵) = 0𝑣 ∈ ℝ) → ((0 < 𝑣 ∧ ∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦)))) → (0 < 𝑣 ∧ ∀𝑢 ∈ (𝐴 + 𝐵)(norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢)))))
7069reximdva 3011 . 2 ((𝐴𝐵) = 0 → (∃𝑣 ∈ ℝ (0 < 𝑣 ∧ ∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦)))) → ∃𝑣 ∈ ℝ (0 < 𝑣 ∧ ∀𝑢 ∈ (𝐴 + 𝐵)(norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢)))))
713, 70mpcom 38 1 (∃𝑣 ∈ ℝ (0 < 𝑣 ∧ ∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦)))) → ∃𝑣 ∈ ℝ (0 < 𝑣 ∧ ∀𝑢 ∈ (𝐴 + 𝐵)(norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢))))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 384   = wceq 1480  wcel 1987  wral 2907  wrex 2908  cin 3554   class class class wbr 4613  cmpt 4673  cfv 5847  crio 6564  (class class class)co 6604  cr 9879  0cc0 9880   + caddc 9883   · cmul 9885   < clt 10018  cle 10019  chil 27622   + cva 27623  normcno 27626   S csh 27631   + cph 27634  0c0h 27638
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-rep 4731  ax-sep 4741  ax-nul 4749  ax-pow 4803  ax-pr 4867  ax-un 6902  ax-cnex 9936  ax-resscn 9937  ax-1cn 9938  ax-icn 9939  ax-addcl 9940  ax-addrcl 9941  ax-mulcl 9942  ax-mulrcl 9943  ax-mulcom 9944  ax-addass 9945  ax-mulass 9946  ax-distr 9947  ax-i2m1 9948  ax-1ne0 9949  ax-1rid 9950  ax-rnegex 9951  ax-rrecex 9952  ax-cnre 9953  ax-pre-lttri 9954  ax-pre-lttrn 9955  ax-pre-ltadd 9956  ax-pre-mulgt0 9957  ax-pre-sup 9958  ax-hilex 27702  ax-hfvadd 27703  ax-hvcom 27704  ax-hvass 27705  ax-hv0cl 27706  ax-hvaddid 27707  ax-hfvmul 27708  ax-hvmulid 27709  ax-hvmulass 27710  ax-hvdistr1 27711  ax-hvdistr2 27712  ax-hvmul0 27713  ax-hfi 27782  ax-his1 27785  ax-his3 27787  ax-his4 27788
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-nel 2894  df-ral 2912  df-rex 2913  df-reu 2914  df-rmo 2915  df-rab 2916  df-v 3188  df-sbc 3418  df-csb 3515  df-dif 3558  df-un 3560  df-in 3562  df-ss 3569  df-pss 3571  df-nul 3892  df-if 4059  df-pw 4132  df-sn 4149  df-pr 4151  df-tp 4153  df-op 4155  df-uni 4403  df-int 4441  df-iun 4487  df-br 4614  df-opab 4674  df-mpt 4675  df-tr 4713  df-eprel 4985  df-id 4989  df-po 4995  df-so 4996  df-fr 5033  df-we 5035  df-xp 5080  df-rel 5081  df-cnv 5082  df-co 5083  df-dm 5084  df-rn 5085  df-res 5086  df-ima 5087  df-pred 5639  df-ord 5685  df-on 5686  df-lim 5687  df-suc 5688  df-iota 5810  df-fun 5849  df-fn 5850  df-f 5851  df-f1 5852  df-fo 5853  df-f1o 5854  df-fv 5855  df-riota 6565  df-ov 6607  df-oprab 6608  df-mpt2 6609  df-om 7013  df-2nd 7114  df-wrecs 7352  df-recs 7413  df-rdg 7451  df-er 7687  df-en 7900  df-dom 7901  df-sdom 7902  df-sup 8292  df-pnf 10020  df-mnf 10021  df-xr 10022  df-ltxr 10023  df-le 10024  df-sub 10212  df-neg 10213  df-div 10629  df-nn 10965  df-2 11023  df-3 11024  df-n0 11237  df-z 11322  df-uz 11632  df-rp 11777  df-seq 12742  df-exp 12801  df-cj 13773  df-re 13774  df-im 13775  df-sqrt 13909  df-abs 13910  df-grpo 27193  df-ablo 27245  df-hnorm 27671  df-hvsub 27674  df-sh 27910  df-ch0 27956  df-shs 28013
This theorem is referenced by:  cdj3lem3b  29145  cdj3i  29146
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