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Theorem cdj3lem2b 30130
Description: Lemma for cdj3i 30134. 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 30127 . 2 (∃𝑣 ∈ ℝ (0 < 𝑣 ∧ ∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦)))) → (𝐴𝐵) = 0)
41, 2shseli 29009 . . . . . . . 8 (𝑢 ∈ (𝐴 + 𝐵) ↔ ∃𝑡𝐴𝐵 𝑢 = (𝑡 + ))
54biimpi 217 . . . . . . 7 (𝑢 ∈ (𝐴 + 𝐵) → ∃𝑡𝐴𝐵 𝑢 = (𝑡 + ))
6 fveq2 6666 . . . . . . . . . . . . . 14 (𝑥 = 𝑡 → (norm𝑥) = (norm𝑡))
76oveq1d 7166 . . . . . . . . . . . . 13 (𝑥 = 𝑡 → ((norm𝑥) + (norm𝑦)) = ((norm𝑡) + (norm𝑦)))
8 fvoveq1 7174 . . . . . . . . . . . . . 14 (𝑥 = 𝑡 → (norm‘(𝑥 + 𝑦)) = (norm‘(𝑡 + 𝑦)))
98oveq2d 7167 . . . . . . . . . . . . 13 (𝑥 = 𝑡 → (𝑣 · (norm‘(𝑥 + 𝑦))) = (𝑣 · (norm‘(𝑡 + 𝑦))))
107, 9breq12d 5075 . . . . . . . . . . . 12 (𝑥 = 𝑡 → (((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) ↔ ((norm𝑡) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑡 + 𝑦)))))
11 fveq2 6666 . . . . . . . . . . . . . 14 (𝑦 = → (norm𝑦) = (norm))
1211oveq2d 7167 . . . . . . . . . . . . 13 (𝑦 = → ((norm𝑡) + (norm𝑦)) = ((norm𝑡) + (norm)))
13 oveq2 7159 . . . . . . . . . . . . . . 15 (𝑦 = → (𝑡 + 𝑦) = (𝑡 + ))
1413fveq2d 6670 . . . . . . . . . . . . . 14 (𝑦 = → (norm‘(𝑡 + 𝑦)) = (norm‘(𝑡 + )))
1514oveq2d 7167 . . . . . . . . . . . . 13 (𝑦 = → (𝑣 · (norm‘(𝑡 + 𝑦))) = (𝑣 · (norm‘(𝑡 + ))))
1612, 15breq12d 5075 . . . . . . . . . . . 12 (𝑦 = → (((norm𝑡) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑡 + 𝑦))) ↔ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))))
1710, 16rspc2v 3636 . . . . . . . . . . 11 ((𝑡𝐴𝐵) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))))
18 cdj3lem2.3 . . . . . . . . . . . . . . . . . 18 𝑆 = (𝑥 ∈ (𝐴 + 𝐵) ↦ (𝑧𝐴𝑤𝐵 𝑥 = (𝑧 + 𝑤)))
191, 2, 18cdj3lem2 30128 . . . . . . . . . . . . . . . . 17 ((𝑡𝐴𝐵 ∧ (𝐴𝐵) = 0) → (𝑆‘(𝑡 + )) = 𝑡)
20193expa 1112 . . . . . . . . . . . . . . . 16 (((𝑡𝐴𝐵) ∧ (𝐴𝐵) = 0) → (𝑆‘(𝑡 + )) = 𝑡)
2120fveq2d 6670 . . . . . . . . . . . . . . 15 (((𝑡𝐴𝐵) ∧ (𝐴𝐵) = 0) → (norm‘(𝑆‘(𝑡 + ))) = (norm𝑡))
2221ad2ant2r 743 . . . . . . . . . . . . . 14 ((((𝑡𝐴𝐵) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) ∧ ((𝐴𝐵) = 0𝑣 ∈ ℝ)) → (norm‘(𝑆‘(𝑡 + ))) = (norm𝑡))
232sheli 28907 . . . . . . . . . . . . . . . . . . . . . 22 (𝐵 ∈ ℋ)
24 normge0 28819 . . . . . . . . . . . . . . . . . . . . . 22 ( ∈ ℋ → 0 ≤ (norm))
2523, 24syl 17 . . . . . . . . . . . . . . . . . . . . 21 (𝐵 → 0 ≤ (norm))
2625adantl 482 . . . . . . . . . . . . . . . . . . . 20 ((𝑡𝐴𝐵) → 0 ≤ (norm))
271sheli 28907 . . . . . . . . . . . . . . . . . . . . . 22 (𝑡𝐴𝑡 ∈ ℋ)
28 normcl 28818 . . . . . . . . . . . . . . . . . . . . . 22 (𝑡 ∈ ℋ → (norm𝑡) ∈ ℝ)
2927, 28syl 17 . . . . . . . . . . . . . . . . . . . . 21 (𝑡𝐴 → (norm𝑡) ∈ ℝ)
30 normcl 28818 . . . . . . . . . . . . . . . . . . . . . 22 ( ∈ ℋ → (norm) ∈ ℝ)
3123, 30syl 17 . . . . . . . . . . . . . . . . . . . . 21 (𝐵 → (norm) ∈ ℝ)
32 addge01 11142 . . . . . . . . . . . . . . . . . . . . 21 (((norm𝑡) ∈ ℝ ∧ (norm) ∈ ℝ) → (0 ≤ (norm) ↔ (norm𝑡) ≤ ((norm𝑡) + (norm))))
3329, 31, 32syl2an 595 . . . . . . . . . . . . . . . . . . . 20 ((𝑡𝐴𝐵) → (0 ≤ (norm) ↔ (norm𝑡) ≤ ((norm𝑡) + (norm))))
3426, 33mpbid 233 . . . . . . . . . . . . . . . . . . 19 ((𝑡𝐴𝐵) → (norm𝑡) ≤ ((norm𝑡) + (norm)))
3534adantr 481 . . . . . . . . . . . . . . . . . 18 (((𝑡𝐴𝐵) ∧ 𝑣 ∈ ℝ) → (norm𝑡) ≤ ((norm𝑡) + (norm)))
3629ad2antrr 722 . . . . . . . . . . . . . . . . . . 19 (((𝑡𝐴𝐵) ∧ 𝑣 ∈ ℝ) → (norm𝑡) ∈ ℝ)
37 readdcl 10612 . . . . . . . . . . . . . . . . . . . . 21 (((norm𝑡) ∈ ℝ ∧ (norm) ∈ ℝ) → ((norm𝑡) + (norm)) ∈ ℝ)
3829, 31, 37syl2an 595 . . . . . . . . . . . . . . . . . . . 20 ((𝑡𝐴𝐵) → ((norm𝑡) + (norm)) ∈ ℝ)
3938adantr 481 . . . . . . . . . . . . . . . . . . 19 (((𝑡𝐴𝐵) ∧ 𝑣 ∈ ℝ) → ((norm𝑡) + (norm)) ∈ ℝ)
40 hvaddcl 28705 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝑡 ∈ ℋ ∧ ∈ ℋ) → (𝑡 + ) ∈ ℋ)
4127, 23, 40syl2an 595 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑡𝐴𝐵) → (𝑡 + ) ∈ ℋ)
42 normcl 28818 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑡 + ) ∈ ℋ → (norm‘(𝑡 + )) ∈ ℝ)
4341, 42syl 17 . . . . . . . . . . . . . . . . . . . . 21 ((𝑡𝐴𝐵) → (norm‘(𝑡 + )) ∈ ℝ)
44 remulcl 10614 . . . . . . . . . . . . . . . . . . . . 21 ((𝑣 ∈ ℝ ∧ (norm‘(𝑡 + )) ∈ ℝ) → (𝑣 · (norm‘(𝑡 + ))) ∈ ℝ)
4543, 44sylan2 592 . . . . . . . . . . . . . . . . . . . 20 ((𝑣 ∈ ℝ ∧ (𝑡𝐴𝐵)) → (𝑣 · (norm‘(𝑡 + ))) ∈ ℝ)
4645ancoms 459 . . . . . . . . . . . . . . . . . . 19 (((𝑡𝐴𝐵) ∧ 𝑣 ∈ ℝ) → (𝑣 · (norm‘(𝑡 + ))) ∈ ℝ)
47 letr 10726 . . . . . . . . . . . . . . . . . . 19 (((norm𝑡) ∈ ℝ ∧ ((norm𝑡) + (norm)) ∈ ℝ ∧ (𝑣 · (norm‘(𝑡 + ))) ∈ ℝ) → (((norm𝑡) ≤ ((norm𝑡) + (norm)) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) → (norm𝑡) ≤ (𝑣 · (norm‘(𝑡 + )))))
4836, 39, 46, 47syl3anc 1365 . . . . . . . . . . . . . . . . . 18 (((𝑡𝐴𝐵) ∧ 𝑣 ∈ ℝ) → (((norm𝑡) ≤ ((norm𝑡) + (norm)) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) → (norm𝑡) ≤ (𝑣 · (norm‘(𝑡 + )))))
4935, 48mpand 691 . . . . . . . . . . . . . . . . 17 (((𝑡𝐴𝐵) ∧ 𝑣 ∈ ℝ) → (((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + ))) → (norm𝑡) ≤ (𝑣 · (norm‘(𝑡 + )))))
5049imp 407 . . . . . . . . . . . . . . . 16 ((((𝑡𝐴𝐵) ∧ 𝑣 ∈ ℝ) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) → (norm𝑡) ≤ (𝑣 · (norm‘(𝑡 + ))))
5150an32s 648 . . . . . . . . . . . . . . 15 ((((𝑡𝐴𝐵) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) ∧ 𝑣 ∈ ℝ) → (norm𝑡) ≤ (𝑣 · (norm‘(𝑡 + ))))
5251adantrl 712 . . . . . . . . . . . . . 14 ((((𝑡𝐴𝐵) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) ∧ ((𝐴𝐵) = 0𝑣 ∈ ℝ)) → (norm𝑡) ≤ (𝑣 · (norm‘(𝑡 + ))))
5322, 52eqbrtrd 5084 . . . . . . . . . . . . 13 ((((𝑡𝐴𝐵) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) ∧ ((𝐴𝐵) = 0𝑣 ∈ ℝ)) → (norm‘(𝑆‘(𝑡 + ))) ≤ (𝑣 · (norm‘(𝑡 + ))))
54 2fveq3 6671 . . . . . . . . . . . . . 14 (𝑢 = (𝑡 + ) → (norm‘(𝑆𝑢)) = (norm‘(𝑆‘(𝑡 + ))))
55 fveq2 6666 . . . . . . . . . . . . . . 15 (𝑢 = (𝑡 + ) → (norm𝑢) = (norm‘(𝑡 + )))
5655oveq2d 7167 . . . . . . . . . . . . . 14 (𝑢 = (𝑡 + ) → (𝑣 · (norm𝑢)) = (𝑣 · (norm‘(𝑡 + ))))
5754, 56breq12d 5075 . . . . . . . . . . . . 13 (𝑢 = (𝑡 + ) → ((norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢)) ↔ (norm‘(𝑆‘(𝑡 + ))) ≤ (𝑣 · (norm‘(𝑡 + )))))
5853, 57syl5ibrcom 248 . . . . . . . . . . . 12 ((((𝑡𝐴𝐵) ∧ ((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + )))) ∧ ((𝐴𝐵) = 0𝑣 ∈ ℝ)) → (𝑢 = (𝑡 + ) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢))))
5958exp31 420 . . . . . . . . . . 11 ((𝑡𝐴𝐵) → (((norm𝑡) + (norm)) ≤ (𝑣 · (norm‘(𝑡 + ))) → (((𝐴𝐵) = 0𝑣 ∈ ℝ) → (𝑢 = (𝑡 + ) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢))))))
6017, 59syld 47 . . . . . . . . . 10 ((𝑡𝐴𝐵) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → (((𝐴𝐵) = 0𝑣 ∈ ℝ) → (𝑢 = (𝑡 + ) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢))))))
6160com14 96 . . . . . . . . 9 (𝑢 = (𝑡 + ) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → (((𝐴𝐵) = 0𝑣 ∈ ℝ) → ((𝑡𝐴𝐵) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢))))))
6261com4t 93 . . . . . . . 8 (((𝐴𝐵) = 0𝑣 ∈ ℝ) → ((𝑡𝐴𝐵) → (𝑢 = (𝑡 + ) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢))))))
6362rexlimdvv 3297 . . . . . . 7 (((𝐴𝐵) = 0𝑣 ∈ ℝ) → (∃𝑡𝐴𝐵 𝑢 = (𝑡 + ) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢)))))
645, 63syl5com 31 . . . . . 6 (𝑢 ∈ (𝐴 + 𝐵) → (((𝐴𝐵) = 0𝑣 ∈ ℝ) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢)))))
6564com3l 89 . . . . 5 (((𝐴𝐵) = 0𝑣 ∈ ℝ) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → (𝑢 ∈ (𝐴 + 𝐵) → (norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢)))))
6665ralrimdv 3192 . . . 4 (((𝐴𝐵) = 0𝑣 ∈ ℝ) → (∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦))) → ∀𝑢 ∈ (𝐴 + 𝐵)(norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢))))
6766anim2d 611 . . 3 (((𝐴𝐵) = 0𝑣 ∈ ℝ) → ((0 < 𝑣 ∧ ∀𝑥𝐴𝑦𝐵 ((norm𝑥) + (norm𝑦)) ≤ (𝑣 · (norm‘(𝑥 + 𝑦)))) → (0 < 𝑣 ∧ ∀𝑢 ∈ (𝐴 + 𝐵)(norm‘(𝑆𝑢)) ≤ (𝑣 · (norm𝑢)))))
6867reximdva 3278 . 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)))))
693, 68mpcom 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 207  wa 396   = wceq 1530  wcel 2107  wral 3142  wrex 3143  cin 3938   class class class wbr 5062  cmpt 5142  cfv 6351  crio 7108  (class class class)co 7151  cr 10528  0cc0 10529   + caddc 10532   · cmul 10534   < clt 10667  cle 10668  chba 28612   + cva 28613  normcno 28616   S csh 28621   + cph 28624  0c0h 28628
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1904  ax-6 1963  ax-7 2008  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2153  ax-12 2169  ax-13 2385  ax-ext 2797  ax-rep 5186  ax-sep 5199  ax-nul 5206  ax-pow 5262  ax-pr 5325  ax-un 7454  ax-cnex 10585  ax-resscn 10586  ax-1cn 10587  ax-icn 10588  ax-addcl 10589  ax-addrcl 10590  ax-mulcl 10591  ax-mulrcl 10592  ax-mulcom 10593  ax-addass 10594  ax-mulass 10595  ax-distr 10596  ax-i2m1 10597  ax-1ne0 10598  ax-1rid 10599  ax-rnegex 10600  ax-rrecex 10601  ax-cnre 10602  ax-pre-lttri 10603  ax-pre-lttrn 10604  ax-pre-ltadd 10605  ax-pre-mulgt0 10606  ax-pre-sup 10607  ax-hilex 28692  ax-hfvadd 28693  ax-hvcom 28694  ax-hvass 28695  ax-hv0cl 28696  ax-hvaddid 28697  ax-hfvmul 28698  ax-hvmulid 28699  ax-hvmulass 28700  ax-hvdistr1 28701  ax-hvdistr2 28702  ax-hvmul0 28703  ax-hfi 28772  ax-his1 28775  ax-his3 28777  ax-his4 28778
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 844  df-3or 1082  df-3an 1083  df-tru 1533  df-ex 1774  df-nf 1778  df-sb 2063  df-mo 2619  df-eu 2651  df-clab 2804  df-cleq 2818  df-clel 2897  df-nfc 2967  df-ne 3021  df-nel 3128  df-ral 3147  df-rex 3148  df-reu 3149  df-rmo 3150  df-rab 3151  df-v 3501  df-sbc 3776  df-csb 3887  df-dif 3942  df-un 3944  df-in 3946  df-ss 3955  df-pss 3957  df-nul 4295  df-if 4470  df-pw 4543  df-sn 4564  df-pr 4566  df-tp 4568  df-op 4570  df-uni 4837  df-int 4874  df-iun 4918  df-br 5063  df-opab 5125  df-mpt 5143  df-tr 5169  df-id 5458  df-eprel 5463  df-po 5472  df-so 5473  df-fr 5512  df-we 5514  df-xp 5559  df-rel 5560  df-cnv 5561  df-co 5562  df-dm 5563  df-rn 5564  df-res 5565  df-ima 5566  df-pred 6145  df-ord 6191  df-on 6192  df-lim 6193  df-suc 6194  df-iota 6311  df-fun 6353  df-fn 6354  df-f 6355  df-f1 6356  df-fo 6357  df-f1o 6358  df-fv 6359  df-riota 7109  df-ov 7154  df-oprab 7155  df-mpo 7156  df-om 7572  df-2nd 7684  df-wrecs 7941  df-recs 8002  df-rdg 8040  df-er 8282  df-en 8502  df-dom 8503  df-sdom 8504  df-sup 8898  df-pnf 10669  df-mnf 10670  df-xr 10671  df-ltxr 10672  df-le 10673  df-sub 10864  df-neg 10865  df-div 11290  df-nn 11631  df-2 11692  df-3 11693  df-n0 11890  df-z 11974  df-uz 12236  df-rp 12383  df-seq 13363  df-exp 13423  df-cj 14451  df-re 14452  df-im 14453  df-sqrt 14587  df-abs 14588  df-grpo 28186  df-ablo 28238  df-hnorm 28661  df-hvsub 28664  df-sh 28900  df-ch0 28946  df-shs 29001
This theorem is referenced by:  cdj3lem3b  30133  cdj3i  30134
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