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Theorem rolle 24044
Description: Rolle's theorem. If 𝐹 is a real continuous function on [𝐴, 𝐵] which is differentiable on (𝐴, 𝐵), and 𝐹(𝐴) = 𝐹(𝐵), then there is some 𝑥 ∈ (𝐴, 𝐵) such that (ℝ D 𝐹)‘𝑥 = 0. (Contributed by Mario Carneiro, 1-Sep-2014.)
Hypotheses
Ref Expression
rolle.a (𝜑𝐴 ∈ ℝ)
rolle.b (𝜑𝐵 ∈ ℝ)
rolle.lt (𝜑𝐴 < 𝐵)
rolle.f (𝜑𝐹 ∈ ((𝐴[,]𝐵)–cn→ℝ))
rolle.d (𝜑 → dom (ℝ D 𝐹) = (𝐴(,)𝐵))
rolle.e (𝜑 → (𝐹𝐴) = (𝐹𝐵))
Assertion
Ref Expression
rolle (𝜑 → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0)
Distinct variable groups:   𝑥,𝐴   𝜑,𝑥   𝑥,𝐵   𝑥,𝐹

Proof of Theorem rolle
Dummy variables 𝑢 𝑡 𝑣 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 rolle.a . . . 4 (𝜑𝐴 ∈ ℝ)
2 rolle.b . . . 4 (𝜑𝐵 ∈ ℝ)
3 rolle.lt . . . . 5 (𝜑𝐴 < 𝐵)
41, 2, 3ltled 10439 . . . 4 (𝜑𝐴𝐵)
5 rolle.f . . . 4 (𝜑𝐹 ∈ ((𝐴[,]𝐵)–cn→ℝ))
61, 2, 4, 5evthicc 23517 . . 3 (𝜑 → (∃𝑢 ∈ (𝐴[,]𝐵)∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) ≤ (𝐹𝑢) ∧ ∃𝑣 ∈ (𝐴[,]𝐵)∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑣) ≤ (𝐹𝑦)))
7 reeanv 3254 . . 3 (∃𝑢 ∈ (𝐴[,]𝐵)∃𝑣 ∈ (𝐴[,]𝐵)(∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) ≤ (𝐹𝑢) ∧ ∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑣) ≤ (𝐹𝑦)) ↔ (∃𝑢 ∈ (𝐴[,]𝐵)∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) ≤ (𝐹𝑢) ∧ ∃𝑣 ∈ (𝐴[,]𝐵)∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑣) ≤ (𝐹𝑦)))
86, 7sylibr 225 . 2 (𝜑 → ∃𝑢 ∈ (𝐴[,]𝐵)∃𝑣 ∈ (𝐴[,]𝐵)(∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) ≤ (𝐹𝑢) ∧ ∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑣) ≤ (𝐹𝑦)))
9 r19.26 3211 . . . 4 (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ↔ (∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) ≤ (𝐹𝑢) ∧ ∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑣) ≤ (𝐹𝑦)))
101ad2antrr 717 . . . . . . . 8 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑢 ∈ {𝐴, 𝐵})) → 𝐴 ∈ ℝ)
112ad2antrr 717 . . . . . . . 8 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑢 ∈ {𝐴, 𝐵})) → 𝐵 ∈ ℝ)
123ad2antrr 717 . . . . . . . 8 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑢 ∈ {𝐴, 𝐵})) → 𝐴 < 𝐵)
135ad2antrr 717 . . . . . . . 8 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑢 ∈ {𝐴, 𝐵})) → 𝐹 ∈ ((𝐴[,]𝐵)–cn→ℝ))
14 rolle.d . . . . . . . . 9 (𝜑 → dom (ℝ D 𝐹) = (𝐴(,)𝐵))
1514ad2antrr 717 . . . . . . . 8 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑢 ∈ {𝐴, 𝐵})) → dom (ℝ D 𝐹) = (𝐴(,)𝐵))
16 simpl 474 . . . . . . . . . . 11 (((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) → (𝐹𝑦) ≤ (𝐹𝑢))
1716ralimi 3099 . . . . . . . . . 10 (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) → ∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) ≤ (𝐹𝑢))
18 fveq2 6375 . . . . . . . . . . . 12 (𝑦 = 𝑡 → (𝐹𝑦) = (𝐹𝑡))
1918breq1d 4819 . . . . . . . . . . 11 (𝑦 = 𝑡 → ((𝐹𝑦) ≤ (𝐹𝑢) ↔ (𝐹𝑡) ≤ (𝐹𝑢)))
2019cbvralv 3319 . . . . . . . . . 10 (∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) ≤ (𝐹𝑢) ↔ ∀𝑡 ∈ (𝐴[,]𝐵)(𝐹𝑡) ≤ (𝐹𝑢))
2117, 20sylib 209 . . . . . . . . 9 (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) → ∀𝑡 ∈ (𝐴[,]𝐵)(𝐹𝑡) ≤ (𝐹𝑢))
2221ad2antrl 719 . . . . . . . 8 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑢 ∈ {𝐴, 𝐵})) → ∀𝑡 ∈ (𝐴[,]𝐵)(𝐹𝑡) ≤ (𝐹𝑢))
23 simplrl 795 . . . . . . . 8 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑢 ∈ {𝐴, 𝐵})) → 𝑢 ∈ (𝐴[,]𝐵))
24 simprr 789 . . . . . . . 8 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑢 ∈ {𝐴, 𝐵})) → ¬ 𝑢 ∈ {𝐴, 𝐵})
2510, 11, 12, 13, 15, 22, 23, 24rollelem 24043 . . . . . . 7 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑢 ∈ {𝐴, 𝐵})) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0)
2625expr 448 . . . . . 6 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ ∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦))) → (¬ 𝑢 ∈ {𝐴, 𝐵} → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0))
271ad2antrr 717 . . . . . . . . 9 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑣 ∈ {𝐴, 𝐵})) → 𝐴 ∈ ℝ)
282ad2antrr 717 . . . . . . . . 9 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑣 ∈ {𝐴, 𝐵})) → 𝐵 ∈ ℝ)
293ad2antrr 717 . . . . . . . . 9 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑣 ∈ {𝐴, 𝐵})) → 𝐴 < 𝐵)
30 cncff 22975 . . . . . . . . . . . . . . 15 (𝐹 ∈ ((𝐴[,]𝐵)–cn→ℝ) → 𝐹:(𝐴[,]𝐵)⟶ℝ)
315, 30syl 17 . . . . . . . . . . . . . 14 (𝜑𝐹:(𝐴[,]𝐵)⟶ℝ)
3231ffvelrnda 6549 . . . . . . . . . . . . 13 ((𝜑𝑢 ∈ (𝐴[,]𝐵)) → (𝐹𝑢) ∈ ℝ)
3332renegcld 10711 . . . . . . . . . . . 12 ((𝜑𝑢 ∈ (𝐴[,]𝐵)) → -(𝐹𝑢) ∈ ℝ)
3433fmpttd 6575 . . . . . . . . . . 11 (𝜑 → (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)):(𝐴[,]𝐵)⟶ℝ)
35 ax-resscn 10246 . . . . . . . . . . . 12 ℝ ⊆ ℂ
36 ssid 3783 . . . . . . . . . . . . . . 15 ℂ ⊆ ℂ
37 cncfss 22981 . . . . . . . . . . . . . . 15 ((ℝ ⊆ ℂ ∧ ℂ ⊆ ℂ) → ((𝐴[,]𝐵)–cn→ℝ) ⊆ ((𝐴[,]𝐵)–cn→ℂ))
3835, 36, 37mp2an 683 . . . . . . . . . . . . . 14 ((𝐴[,]𝐵)–cn→ℝ) ⊆ ((𝐴[,]𝐵)–cn→ℂ)
3938, 5sseldi 3759 . . . . . . . . . . . . 13 (𝜑𝐹 ∈ ((𝐴[,]𝐵)–cn→ℂ))
40 eqid 2765 . . . . . . . . . . . . . 14 (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)) = (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))
4140negfcncf 23001 . . . . . . . . . . . . 13 (𝐹 ∈ ((𝐴[,]𝐵)–cn→ℂ) → (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)) ∈ ((𝐴[,]𝐵)–cn→ℂ))
4239, 41syl 17 . . . . . . . . . . . 12 (𝜑 → (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)) ∈ ((𝐴[,]𝐵)–cn→ℂ))
43 cncffvrn 22980 . . . . . . . . . . . 12 ((ℝ ⊆ ℂ ∧ (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)) ∈ ((𝐴[,]𝐵)–cn→ℂ)) → ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)) ∈ ((𝐴[,]𝐵)–cn→ℝ) ↔ (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)):(𝐴[,]𝐵)⟶ℝ))
4435, 42, 43sylancr 581 . . . . . . . . . . 11 (𝜑 → ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)) ∈ ((𝐴[,]𝐵)–cn→ℝ) ↔ (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)):(𝐴[,]𝐵)⟶ℝ))
4534, 44mpbird 248 . . . . . . . . . 10 (𝜑 → (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)) ∈ ((𝐴[,]𝐵)–cn→ℝ))
4645ad2antrr 717 . . . . . . . . 9 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑣 ∈ {𝐴, 𝐵})) → (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)) ∈ ((𝐴[,]𝐵)–cn→ℝ))
4735a1i 11 . . . . . . . . . . . . . 14 (𝜑 → ℝ ⊆ ℂ)
48 iccssre 12457 . . . . . . . . . . . . . . 15 ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴[,]𝐵) ⊆ ℝ)
491, 2, 48syl2anc 579 . . . . . . . . . . . . . 14 (𝜑 → (𝐴[,]𝐵) ⊆ ℝ)
50 fss 6236 . . . . . . . . . . . . . . . . 17 ((𝐹:(𝐴[,]𝐵)⟶ℝ ∧ ℝ ⊆ ℂ) → 𝐹:(𝐴[,]𝐵)⟶ℂ)
5131, 35, 50sylancl 580 . . . . . . . . . . . . . . . 16 (𝜑𝐹:(𝐴[,]𝐵)⟶ℂ)
5251ffvelrnda 6549 . . . . . . . . . . . . . . 15 ((𝜑𝑢 ∈ (𝐴[,]𝐵)) → (𝐹𝑢) ∈ ℂ)
5352negcld 10633 . . . . . . . . . . . . . 14 ((𝜑𝑢 ∈ (𝐴[,]𝐵)) → -(𝐹𝑢) ∈ ℂ)
54 eqid 2765 . . . . . . . . . . . . . . 15 (TopOpen‘ℂfld) = (TopOpen‘ℂfld)
5554tgioo2 22885 . . . . . . . . . . . . . 14 (topGen‘ran (,)) = ((TopOpen‘ℂfld) ↾t ℝ)
56 iccntr 22903 . . . . . . . . . . . . . . 15 ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((int‘(topGen‘ran (,)))‘(𝐴[,]𝐵)) = (𝐴(,)𝐵))
571, 2, 56syl2anc 579 . . . . . . . . . . . . . 14 (𝜑 → ((int‘(topGen‘ran (,)))‘(𝐴[,]𝐵)) = (𝐴(,)𝐵))
5847, 49, 53, 55, 54, 57dvmptntr 24025 . . . . . . . . . . . . 13 (𝜑 → (ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))) = (ℝ D (𝑢 ∈ (𝐴(,)𝐵) ↦ -(𝐹𝑢))))
59 reelprrecn 10281 . . . . . . . . . . . . . . 15 ℝ ∈ {ℝ, ℂ}
6059a1i 11 . . . . . . . . . . . . . 14 (𝜑 → ℝ ∈ {ℝ, ℂ})
61 ioossicc 12461 . . . . . . . . . . . . . . . 16 (𝐴(,)𝐵) ⊆ (𝐴[,]𝐵)
6261sseli 3757 . . . . . . . . . . . . . . 15 (𝑢 ∈ (𝐴(,)𝐵) → 𝑢 ∈ (𝐴[,]𝐵))
6362, 52sylan2 586 . . . . . . . . . . . . . 14 ((𝜑𝑢 ∈ (𝐴(,)𝐵)) → (𝐹𝑢) ∈ ℂ)
64 fvexd 6390 . . . . . . . . . . . . . 14 ((𝜑𝑢 ∈ (𝐴(,)𝐵)) → ((ℝ D 𝐹)‘𝑢) ∈ V)
6531feqmptd 6438 . . . . . . . . . . . . . . . 16 (𝜑𝐹 = (𝑢 ∈ (𝐴[,]𝐵) ↦ (𝐹𝑢)))
6665oveq2d 6858 . . . . . . . . . . . . . . 15 (𝜑 → (ℝ D 𝐹) = (ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ (𝐹𝑢))))
67 dvf 23962 . . . . . . . . . . . . . . . . 17 (ℝ D 𝐹):dom (ℝ D 𝐹)⟶ℂ
6814feq2d 6209 . . . . . . . . . . . . . . . . 17 (𝜑 → ((ℝ D 𝐹):dom (ℝ D 𝐹)⟶ℂ ↔ (ℝ D 𝐹):(𝐴(,)𝐵)⟶ℂ))
6967, 68mpbii 224 . . . . . . . . . . . . . . . 16 (𝜑 → (ℝ D 𝐹):(𝐴(,)𝐵)⟶ℂ)
7069feqmptd 6438 . . . . . . . . . . . . . . 15 (𝜑 → (ℝ D 𝐹) = (𝑢 ∈ (𝐴(,)𝐵) ↦ ((ℝ D 𝐹)‘𝑢)))
7147, 49, 52, 55, 54, 57dvmptntr 24025 . . . . . . . . . . . . . . 15 (𝜑 → (ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ (𝐹𝑢))) = (ℝ D (𝑢 ∈ (𝐴(,)𝐵) ↦ (𝐹𝑢))))
7266, 70, 713eqtr3rd 2808 . . . . . . . . . . . . . 14 (𝜑 → (ℝ D (𝑢 ∈ (𝐴(,)𝐵) ↦ (𝐹𝑢))) = (𝑢 ∈ (𝐴(,)𝐵) ↦ ((ℝ D 𝐹)‘𝑢)))
7360, 63, 64, 72dvmptneg 24020 . . . . . . . . . . . . 13 (𝜑 → (ℝ D (𝑢 ∈ (𝐴(,)𝐵) ↦ -(𝐹𝑢))) = (𝑢 ∈ (𝐴(,)𝐵) ↦ -((ℝ D 𝐹)‘𝑢)))
7458, 73eqtrd 2799 . . . . . . . . . . . 12 (𝜑 → (ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))) = (𝑢 ∈ (𝐴(,)𝐵) ↦ -((ℝ D 𝐹)‘𝑢)))
7574dmeqd 5494 . . . . . . . . . . 11 (𝜑 → dom (ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))) = dom (𝑢 ∈ (𝐴(,)𝐵) ↦ -((ℝ D 𝐹)‘𝑢)))
76 dmmptg 5818 . . . . . . . . . . . 12 (∀𝑢 ∈ (𝐴(,)𝐵)-((ℝ D 𝐹)‘𝑢) ∈ V → dom (𝑢 ∈ (𝐴(,)𝐵) ↦ -((ℝ D 𝐹)‘𝑢)) = (𝐴(,)𝐵))
77 negex 10533 . . . . . . . . . . . . 13 -((ℝ D 𝐹)‘𝑢) ∈ V
7877a1i 11 . . . . . . . . . . . 12 (𝑢 ∈ (𝐴(,)𝐵) → -((ℝ D 𝐹)‘𝑢) ∈ V)
7976, 78mprg 3073 . . . . . . . . . . 11 dom (𝑢 ∈ (𝐴(,)𝐵) ↦ -((ℝ D 𝐹)‘𝑢)) = (𝐴(,)𝐵)
8075, 79syl6eq 2815 . . . . . . . . . 10 (𝜑 → dom (ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))) = (𝐴(,)𝐵))
8180ad2antrr 717 . . . . . . . . 9 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑣 ∈ {𝐴, 𝐵})) → dom (ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))) = (𝐴(,)𝐵))
82 simpr 477 . . . . . . . . . . . . . 14 (((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) → (𝐹𝑣) ≤ (𝐹𝑦))
8331ad2antrr 717 . . . . . . . . . . . . . . . . 17 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ 𝑦 ∈ (𝐴[,]𝐵)) → 𝐹:(𝐴[,]𝐵)⟶ℝ)
84 simplrr 796 . . . . . . . . . . . . . . . . 17 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ 𝑦 ∈ (𝐴[,]𝐵)) → 𝑣 ∈ (𝐴[,]𝐵))
8583, 84ffvelrnd 6550 . . . . . . . . . . . . . . . 16 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ 𝑦 ∈ (𝐴[,]𝐵)) → (𝐹𝑣) ∈ ℝ)
8631adantr 472 . . . . . . . . . . . . . . . . 17 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) → 𝐹:(𝐴[,]𝐵)⟶ℝ)
8786ffvelrnda 6549 . . . . . . . . . . . . . . . 16 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ 𝑦 ∈ (𝐴[,]𝐵)) → (𝐹𝑦) ∈ ℝ)
8885, 87lenegd 10860 . . . . . . . . . . . . . . 15 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ 𝑦 ∈ (𝐴[,]𝐵)) → ((𝐹𝑣) ≤ (𝐹𝑦) ↔ -(𝐹𝑦) ≤ -(𝐹𝑣)))
89 fveq2 6375 . . . . . . . . . . . . . . . . . . 19 (𝑢 = 𝑦 → (𝐹𝑢) = (𝐹𝑦))
9089negeqd 10529 . . . . . . . . . . . . . . . . . 18 (𝑢 = 𝑦 → -(𝐹𝑢) = -(𝐹𝑦))
91 negex 10533 . . . . . . . . . . . . . . . . . 18 -(𝐹𝑦) ∈ V
9290, 40, 91fvmpt 6471 . . . . . . . . . . . . . . . . 17 (𝑦 ∈ (𝐴[,]𝐵) → ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑦) = -(𝐹𝑦))
9392adantl 473 . . . . . . . . . . . . . . . 16 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ 𝑦 ∈ (𝐴[,]𝐵)) → ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑦) = -(𝐹𝑦))
94 fveq2 6375 . . . . . . . . . . . . . . . . . . 19 (𝑢 = 𝑣 → (𝐹𝑢) = (𝐹𝑣))
9594negeqd 10529 . . . . . . . . . . . . . . . . . 18 (𝑢 = 𝑣 → -(𝐹𝑢) = -(𝐹𝑣))
96 negex 10533 . . . . . . . . . . . . . . . . . 18 -(𝐹𝑣) ∈ V
9795, 40, 96fvmpt 6471 . . . . . . . . . . . . . . . . 17 (𝑣 ∈ (𝐴[,]𝐵) → ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑣) = -(𝐹𝑣))
9884, 97syl 17 . . . . . . . . . . . . . . . 16 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ 𝑦 ∈ (𝐴[,]𝐵)) → ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑣) = -(𝐹𝑣))
9993, 98breq12d 4822 . . . . . . . . . . . . . . 15 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ 𝑦 ∈ (𝐴[,]𝐵)) → (((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑦) ≤ ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑣) ↔ -(𝐹𝑦) ≤ -(𝐹𝑣)))
10088, 99bitr4d 273 . . . . . . . . . . . . . 14 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ 𝑦 ∈ (𝐴[,]𝐵)) → ((𝐹𝑣) ≤ (𝐹𝑦) ↔ ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑦) ≤ ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑣)))
10182, 100syl5ib 235 . . . . . . . . . . . . 13 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ 𝑦 ∈ (𝐴[,]𝐵)) → (((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) → ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑦) ≤ ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑣)))
102101ralimdva 3109 . . . . . . . . . . . 12 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) → (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) → ∀𝑦 ∈ (𝐴[,]𝐵)((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑦) ≤ ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑣)))
103102imp 395 . . . . . . . . . . 11 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ ∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦))) → ∀𝑦 ∈ (𝐴[,]𝐵)((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑦) ≤ ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑣))
104 fveq2 6375 . . . . . . . . . . . . 13 (𝑦 = 𝑡 → ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑦) = ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑡))
105104breq1d 4819 . . . . . . . . . . . 12 (𝑦 = 𝑡 → (((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑦) ≤ ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑣) ↔ ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑡) ≤ ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑣)))
106105cbvralv 3319 . . . . . . . . . . 11 (∀𝑦 ∈ (𝐴[,]𝐵)((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑦) ≤ ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑣) ↔ ∀𝑡 ∈ (𝐴[,]𝐵)((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑡) ≤ ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑣))
107103, 106sylib 209 . . . . . . . . . 10 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ ∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦))) → ∀𝑡 ∈ (𝐴[,]𝐵)((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑡) ≤ ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑣))
108107adantrr 708 . . . . . . . . 9 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑣 ∈ {𝐴, 𝐵})) → ∀𝑡 ∈ (𝐴[,]𝐵)((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑡) ≤ ((𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢))‘𝑣))
109 simplrr 796 . . . . . . . . 9 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑣 ∈ {𝐴, 𝐵})) → 𝑣 ∈ (𝐴[,]𝐵))
110 simprr 789 . . . . . . . . 9 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑣 ∈ {𝐴, 𝐵})) → ¬ 𝑣 ∈ {𝐴, 𝐵})
11127, 28, 29, 46, 81, 108, 109, 110rollelem 24043 . . . . . . . 8 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑣 ∈ {𝐴, 𝐵})) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)))‘𝑥) = 0)
11274fveq1d 6377 . . . . . . . . . . . . 13 (𝜑 → ((ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)))‘𝑥) = ((𝑢 ∈ (𝐴(,)𝐵) ↦ -((ℝ D 𝐹)‘𝑢))‘𝑥))
113 fveq2 6375 . . . . . . . . . . . . . . 15 (𝑢 = 𝑥 → ((ℝ D 𝐹)‘𝑢) = ((ℝ D 𝐹)‘𝑥))
114113negeqd 10529 . . . . . . . . . . . . . 14 (𝑢 = 𝑥 → -((ℝ D 𝐹)‘𝑢) = -((ℝ D 𝐹)‘𝑥))
115 eqid 2765 . . . . . . . . . . . . . 14 (𝑢 ∈ (𝐴(,)𝐵) ↦ -((ℝ D 𝐹)‘𝑢)) = (𝑢 ∈ (𝐴(,)𝐵) ↦ -((ℝ D 𝐹)‘𝑢))
116 negex 10533 . . . . . . . . . . . . . 14 -((ℝ D 𝐹)‘𝑥) ∈ V
117114, 115, 116fvmpt 6471 . . . . . . . . . . . . 13 (𝑥 ∈ (𝐴(,)𝐵) → ((𝑢 ∈ (𝐴(,)𝐵) ↦ -((ℝ D 𝐹)‘𝑢))‘𝑥) = -((ℝ D 𝐹)‘𝑥))
118112, 117sylan9eq 2819 . . . . . . . . . . . 12 ((𝜑𝑥 ∈ (𝐴(,)𝐵)) → ((ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)))‘𝑥) = -((ℝ D 𝐹)‘𝑥))
119118eqeq1d 2767 . . . . . . . . . . 11 ((𝜑𝑥 ∈ (𝐴(,)𝐵)) → (((ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)))‘𝑥) = 0 ↔ -((ℝ D 𝐹)‘𝑥) = 0))
12014eleq2d 2830 . . . . . . . . . . . . . 14 (𝜑 → (𝑥 ∈ dom (ℝ D 𝐹) ↔ 𝑥 ∈ (𝐴(,)𝐵)))
121120biimpar 469 . . . . . . . . . . . . 13 ((𝜑𝑥 ∈ (𝐴(,)𝐵)) → 𝑥 ∈ dom (ℝ D 𝐹))
12267ffvelrni 6548 . . . . . . . . . . . . 13 (𝑥 ∈ dom (ℝ D 𝐹) → ((ℝ D 𝐹)‘𝑥) ∈ ℂ)
123121, 122syl 17 . . . . . . . . . . . 12 ((𝜑𝑥 ∈ (𝐴(,)𝐵)) → ((ℝ D 𝐹)‘𝑥) ∈ ℂ)
124123negeq0d 10638 . . . . . . . . . . 11 ((𝜑𝑥 ∈ (𝐴(,)𝐵)) → (((ℝ D 𝐹)‘𝑥) = 0 ↔ -((ℝ D 𝐹)‘𝑥) = 0))
125119, 124bitr4d 273 . . . . . . . . . 10 ((𝜑𝑥 ∈ (𝐴(,)𝐵)) → (((ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)))‘𝑥) = 0 ↔ ((ℝ D 𝐹)‘𝑥) = 0))
126125rexbidva 3196 . . . . . . . . 9 (𝜑 → (∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)))‘𝑥) = 0 ↔ ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0))
127126ad2antrr 717 . . . . . . . 8 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑣 ∈ {𝐴, 𝐵})) → (∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ -(𝐹𝑢)))‘𝑥) = 0 ↔ ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0))
128111, 127mpbid 223 . . . . . . 7 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ∧ ¬ 𝑣 ∈ {𝐴, 𝐵})) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0)
129128expr 448 . . . . . 6 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ ∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦))) → (¬ 𝑣 ∈ {𝐴, 𝐵} → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0))
130 vex 3353 . . . . . . . . . . 11 𝑢 ∈ V
131130elpr 4357 . . . . . . . . . 10 (𝑢 ∈ {𝐴, 𝐵} ↔ (𝑢 = 𝐴𝑢 = 𝐵))
132 fveq2 6375 . . . . . . . . . . . 12 (𝑢 = 𝐴 → (𝐹𝑢) = (𝐹𝐴))
133132a1i 11 . . . . . . . . . . 11 (𝜑 → (𝑢 = 𝐴 → (𝐹𝑢) = (𝐹𝐴)))
134 rolle.e . . . . . . . . . . . . 13 (𝜑 → (𝐹𝐴) = (𝐹𝐵))
135134eqcomd 2771 . . . . . . . . . . . 12 (𝜑 → (𝐹𝐵) = (𝐹𝐴))
136 fveqeq2 6384 . . . . . . . . . . . 12 (𝑢 = 𝐵 → ((𝐹𝑢) = (𝐹𝐴) ↔ (𝐹𝐵) = (𝐹𝐴)))
137135, 136syl5ibrcom 238 . . . . . . . . . . 11 (𝜑 → (𝑢 = 𝐵 → (𝐹𝑢) = (𝐹𝐴)))
138133, 137jaod 885 . . . . . . . . . 10 (𝜑 → ((𝑢 = 𝐴𝑢 = 𝐵) → (𝐹𝑢) = (𝐹𝐴)))
139131, 138syl5bi 233 . . . . . . . . 9 (𝜑 → (𝑢 ∈ {𝐴, 𝐵} → (𝐹𝑢) = (𝐹𝐴)))
140 eleq1w 2827 . . . . . . . . . . . 12 (𝑢 = 𝑣 → (𝑢 ∈ {𝐴, 𝐵} ↔ 𝑣 ∈ {𝐴, 𝐵}))
141 fveqeq2 6384 . . . . . . . . . . . 12 (𝑢 = 𝑣 → ((𝐹𝑢) = (𝐹𝐴) ↔ (𝐹𝑣) = (𝐹𝐴)))
142140, 141imbi12d 335 . . . . . . . . . . 11 (𝑢 = 𝑣 → ((𝑢 ∈ {𝐴, 𝐵} → (𝐹𝑢) = (𝐹𝐴)) ↔ (𝑣 ∈ {𝐴, 𝐵} → (𝐹𝑣) = (𝐹𝐴))))
143142imbi2d 331 . . . . . . . . . 10 (𝑢 = 𝑣 → ((𝜑 → (𝑢 ∈ {𝐴, 𝐵} → (𝐹𝑢) = (𝐹𝐴))) ↔ (𝜑 → (𝑣 ∈ {𝐴, 𝐵} → (𝐹𝑣) = (𝐹𝐴)))))
144143, 139chvarv 2369 . . . . . . . . 9 (𝜑 → (𝑣 ∈ {𝐴, 𝐵} → (𝐹𝑣) = (𝐹𝐴)))
145139, 144anim12d 602 . . . . . . . 8 (𝜑 → ((𝑢 ∈ {𝐴, 𝐵} ∧ 𝑣 ∈ {𝐴, 𝐵}) → ((𝐹𝑢) = (𝐹𝐴) ∧ (𝐹𝑣) = (𝐹𝐴))))
146145ad2antrr 717 . . . . . . 7 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ ∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦))) → ((𝑢 ∈ {𝐴, 𝐵} ∧ 𝑣 ∈ {𝐴, 𝐵}) → ((𝐹𝑢) = (𝐹𝐴) ∧ (𝐹𝑣) = (𝐹𝐴))))
1471rexrd 10343 . . . . . . . . . . . . . . . . 17 (𝜑𝐴 ∈ ℝ*)
1482rexrd 10343 . . . . . . . . . . . . . . . . 17 (𝜑𝐵 ∈ ℝ*)
149 lbicc2 12492 . . . . . . . . . . . . . . . . 17 ((𝐴 ∈ ℝ*𝐵 ∈ ℝ*𝐴𝐵) → 𝐴 ∈ (𝐴[,]𝐵))
150147, 148, 4, 149syl3anc 1490 . . . . . . . . . . . . . . . 16 (𝜑𝐴 ∈ (𝐴[,]𝐵))
15131, 150ffvelrnd 6550 . . . . . . . . . . . . . . 15 (𝜑 → (𝐹𝐴) ∈ ℝ)
152151ad2antrr 717 . . . . . . . . . . . . . 14 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ 𝑦 ∈ (𝐴[,]𝐵)) → (𝐹𝐴) ∈ ℝ)
15387, 152letri3d 10433 . . . . . . . . . . . . 13 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ 𝑦 ∈ (𝐴[,]𝐵)) → ((𝐹𝑦) = (𝐹𝐴) ↔ ((𝐹𝑦) ≤ (𝐹𝐴) ∧ (𝐹𝐴) ≤ (𝐹𝑦))))
154 breq2 4813 . . . . . . . . . . . . . . 15 ((𝐹𝑢) = (𝐹𝐴) → ((𝐹𝑦) ≤ (𝐹𝑢) ↔ (𝐹𝑦) ≤ (𝐹𝐴)))
155 breq1 4812 . . . . . . . . . . . . . . 15 ((𝐹𝑣) = (𝐹𝐴) → ((𝐹𝑣) ≤ (𝐹𝑦) ↔ (𝐹𝐴) ≤ (𝐹𝑦)))
156154, 155bi2anan9 629 . . . . . . . . . . . . . 14 (((𝐹𝑢) = (𝐹𝐴) ∧ (𝐹𝑣) = (𝐹𝐴)) → (((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) ↔ ((𝐹𝑦) ≤ (𝐹𝐴) ∧ (𝐹𝐴) ≤ (𝐹𝑦))))
157156bibi2d 333 . . . . . . . . . . . . 13 (((𝐹𝑢) = (𝐹𝐴) ∧ (𝐹𝑣) = (𝐹𝐴)) → (((𝐹𝑦) = (𝐹𝐴) ↔ ((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦))) ↔ ((𝐹𝑦) = (𝐹𝐴) ↔ ((𝐹𝑦) ≤ (𝐹𝐴) ∧ (𝐹𝐴) ≤ (𝐹𝑦)))))
158153, 157syl5ibrcom 238 . . . . . . . . . . . 12 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ 𝑦 ∈ (𝐴[,]𝐵)) → (((𝐹𝑢) = (𝐹𝐴) ∧ (𝐹𝑣) = (𝐹𝐴)) → ((𝐹𝑦) = (𝐹𝐴) ↔ ((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)))))
159158impancom 443 . . . . . . . . . . 11 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ ((𝐹𝑢) = (𝐹𝐴) ∧ (𝐹𝑣) = (𝐹𝐴))) → (𝑦 ∈ (𝐴[,]𝐵) → ((𝐹𝑦) = (𝐹𝐴) ↔ ((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)))))
160159imp 395 . . . . . . . . . 10 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ ((𝐹𝑢) = (𝐹𝐴) ∧ (𝐹𝑣) = (𝐹𝐴))) ∧ 𝑦 ∈ (𝐴[,]𝐵)) → ((𝐹𝑦) = (𝐹𝐴) ↔ ((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦))))
161160ralbidva 3132 . . . . . . . . 9 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ ((𝐹𝑢) = (𝐹𝐴) ∧ (𝐹𝑣) = (𝐹𝐴))) → (∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) = (𝐹𝐴) ↔ ∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦))))
16231ffnd 6224 . . . . . . . . . . . . 13 (𝜑𝐹 Fn (𝐴[,]𝐵))
163 fnconstg 6275 . . . . . . . . . . . . . 14 ((𝐹𝐴) ∈ ℝ → ((𝐴[,]𝐵) × {(𝐹𝐴)}) Fn (𝐴[,]𝐵))
164151, 163syl 17 . . . . . . . . . . . . 13 (𝜑 → ((𝐴[,]𝐵) × {(𝐹𝐴)}) Fn (𝐴[,]𝐵))
165 eqfnfv 6501 . . . . . . . . . . . . 13 ((𝐹 Fn (𝐴[,]𝐵) ∧ ((𝐴[,]𝐵) × {(𝐹𝐴)}) Fn (𝐴[,]𝐵)) → (𝐹 = ((𝐴[,]𝐵) × {(𝐹𝐴)}) ↔ ∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) = (((𝐴[,]𝐵) × {(𝐹𝐴)})‘𝑦)))
166162, 164, 165syl2anc 579 . . . . . . . . . . . 12 (𝜑 → (𝐹 = ((𝐴[,]𝐵) × {(𝐹𝐴)}) ↔ ∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) = (((𝐴[,]𝐵) × {(𝐹𝐴)})‘𝑦)))
167 fvex 6388 . . . . . . . . . . . . . . 15 (𝐹𝐴) ∈ V
168167fvconst2 6662 . . . . . . . . . . . . . 14 (𝑦 ∈ (𝐴[,]𝐵) → (((𝐴[,]𝐵) × {(𝐹𝐴)})‘𝑦) = (𝐹𝐴))
169168eqeq2d 2775 . . . . . . . . . . . . 13 (𝑦 ∈ (𝐴[,]𝐵) → ((𝐹𝑦) = (((𝐴[,]𝐵) × {(𝐹𝐴)})‘𝑦) ↔ (𝐹𝑦) = (𝐹𝐴)))
170169ralbiia 3126 . . . . . . . . . . . 12 (∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) = (((𝐴[,]𝐵) × {(𝐹𝐴)})‘𝑦) ↔ ∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) = (𝐹𝐴))
171166, 170syl6bb 278 . . . . . . . . . . 11 (𝜑 → (𝐹 = ((𝐴[,]𝐵) × {(𝐹𝐴)}) ↔ ∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) = (𝐹𝐴)))
172 fconstmpt 5333 . . . . . . . . . . . . . . . . . . . 20 ((𝐴[,]𝐵) × {(𝐹𝐴)}) = (𝑢 ∈ (𝐴[,]𝐵) ↦ (𝐹𝐴))
173172eqeq2i 2777 . . . . . . . . . . . . . . . . . . 19 (𝐹 = ((𝐴[,]𝐵) × {(𝐹𝐴)}) ↔ 𝐹 = (𝑢 ∈ (𝐴[,]𝐵) ↦ (𝐹𝐴)))
174173biimpi 207 . . . . . . . . . . . . . . . . . 18 (𝐹 = ((𝐴[,]𝐵) × {(𝐹𝐴)}) → 𝐹 = (𝑢 ∈ (𝐴[,]𝐵) ↦ (𝐹𝐴)))
175174oveq2d 6858 . . . . . . . . . . . . . . . . 17 (𝐹 = ((𝐴[,]𝐵) × {(𝐹𝐴)}) → (ℝ D 𝐹) = (ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ (𝐹𝐴))))
176151recnd 10322 . . . . . . . . . . . . . . . . . . 19 (𝜑 → (𝐹𝐴) ∈ ℂ)
177176adantr 472 . . . . . . . . . . . . . . . . . 18 ((𝜑𝑢 ∈ ℝ) → (𝐹𝐴) ∈ ℂ)
178 0cnd 10286 . . . . . . . . . . . . . . . . . 18 ((𝜑𝑢 ∈ ℝ) → 0 ∈ ℂ)
17960, 176dvmptc 24012 . . . . . . . . . . . . . . . . . 18 (𝜑 → (ℝ D (𝑢 ∈ ℝ ↦ (𝐹𝐴))) = (𝑢 ∈ ℝ ↦ 0))
18060, 177, 178, 179, 49, 55, 54, 57dvmptres2 24016 . . . . . . . . . . . . . . . . 17 (𝜑 → (ℝ D (𝑢 ∈ (𝐴[,]𝐵) ↦ (𝐹𝐴))) = (𝑢 ∈ (𝐴(,)𝐵) ↦ 0))
181175, 180sylan9eqr 2821 . . . . . . . . . . . . . . . 16 ((𝜑𝐹 = ((𝐴[,]𝐵) × {(𝐹𝐴)})) → (ℝ D 𝐹) = (𝑢 ∈ (𝐴(,)𝐵) ↦ 0))
182181fveq1d 6377 . . . . . . . . . . . . . . 15 ((𝜑𝐹 = ((𝐴[,]𝐵) × {(𝐹𝐴)})) → ((ℝ D 𝐹)‘𝑥) = ((𝑢 ∈ (𝐴(,)𝐵) ↦ 0)‘𝑥))
183 eqidd 2766 . . . . . . . . . . . . . . . 16 (𝑢 = 𝑥 → 0 = 0)
184 eqid 2765 . . . . . . . . . . . . . . . 16 (𝑢 ∈ (𝐴(,)𝐵) ↦ 0) = (𝑢 ∈ (𝐴(,)𝐵) ↦ 0)
185 c0ex 10287 . . . . . . . . . . . . . . . 16 0 ∈ V
186183, 184, 185fvmpt 6471 . . . . . . . . . . . . . . 15 (𝑥 ∈ (𝐴(,)𝐵) → ((𝑢 ∈ (𝐴(,)𝐵) ↦ 0)‘𝑥) = 0)
187182, 186sylan9eq 2819 . . . . . . . . . . . . . 14 (((𝜑𝐹 = ((𝐴[,]𝐵) × {(𝐹𝐴)})) ∧ 𝑥 ∈ (𝐴(,)𝐵)) → ((ℝ D 𝐹)‘𝑥) = 0)
188187ralrimiva 3113 . . . . . . . . . . . . 13 ((𝜑𝐹 = ((𝐴[,]𝐵) × {(𝐹𝐴)})) → ∀𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0)
189 ioon0 12403 . . . . . . . . . . . . . . . 16 ((𝐴 ∈ ℝ*𝐵 ∈ ℝ*) → ((𝐴(,)𝐵) ≠ ∅ ↔ 𝐴 < 𝐵))
190147, 148, 189syl2anc 579 . . . . . . . . . . . . . . 15 (𝜑 → ((𝐴(,)𝐵) ≠ ∅ ↔ 𝐴 < 𝐵))
1913, 190mpbird 248 . . . . . . . . . . . . . 14 (𝜑 → (𝐴(,)𝐵) ≠ ∅)
192 r19.2z 4219 . . . . . . . . . . . . . 14 (((𝐴(,)𝐵) ≠ ∅ ∧ ∀𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0)
193191, 192sylan 575 . . . . . . . . . . . . 13 ((𝜑 ∧ ∀𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0)
194188, 193syldan 585 . . . . . . . . . . . 12 ((𝜑𝐹 = ((𝐴[,]𝐵) × {(𝐹𝐴)})) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0)
195194ex 401 . . . . . . . . . . 11 (𝜑 → (𝐹 = ((𝐴[,]𝐵) × {(𝐹𝐴)}) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0))
196171, 195sylbird 251 . . . . . . . . . 10 (𝜑 → (∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) = (𝐹𝐴) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0))
197196ad2antrr 717 . . . . . . . . 9 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ ((𝐹𝑢) = (𝐹𝐴) ∧ (𝐹𝑣) = (𝐹𝐴))) → (∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) = (𝐹𝐴) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0))
198161, 197sylbird 251 . . . . . . . 8 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ ((𝐹𝑢) = (𝐹𝐴) ∧ (𝐹𝑣) = (𝐹𝐴))) → (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0))
199198impancom 443 . . . . . . 7 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ ∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦))) → (((𝐹𝑢) = (𝐹𝐴) ∧ (𝐹𝑣) = (𝐹𝐴)) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0))
200146, 199syld 47 . . . . . 6 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ ∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦))) → ((𝑢 ∈ {𝐴, 𝐵} ∧ 𝑣 ∈ {𝐴, 𝐵}) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0))
20126, 129, 200ecased 1058 . . . . 5 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) ∧ ∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦))) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0)
202201ex 401 . . . 4 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) → (∀𝑦 ∈ (𝐴[,]𝐵)((𝐹𝑦) ≤ (𝐹𝑢) ∧ (𝐹𝑣) ≤ (𝐹𝑦)) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0))
2039, 202syl5bir 234 . . 3 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑣 ∈ (𝐴[,]𝐵))) → ((∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) ≤ (𝐹𝑢) ∧ ∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑣) ≤ (𝐹𝑦)) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0))
204203rexlimdvva 3185 . 2 (𝜑 → (∃𝑢 ∈ (𝐴[,]𝐵)∃𝑣 ∈ (𝐴[,]𝐵)(∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑦) ≤ (𝐹𝑢) ∧ ∀𝑦 ∈ (𝐴[,]𝐵)(𝐹𝑣) ≤ (𝐹𝑦)) → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0))
2058, 204mpd 15 1 (𝜑 → ∃𝑥 ∈ (𝐴(,)𝐵)((ℝ D 𝐹)‘𝑥) = 0)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 197  wa 384  wo 873   = wceq 1652  wcel 2155  wne 2937  wral 3055  wrex 3056  Vcvv 3350  wss 3732  c0 4079  {csn 4334  {cpr 4336   class class class wbr 4809  cmpt 4888   × cxp 5275  dom cdm 5277  ran crn 5278   Fn wfn 6063  wf 6064  cfv 6068  (class class class)co 6842  cc 10187  cr 10188  0cc0 10189  *cxr 10327   < clt 10328  cle 10329  -cneg 10521  (,)cioo 12377  [,]cicc 12380  TopOpenctopn 16350  topGenctg 16366  fldccnfld 20019  intcnt 21101  cnccncf 22958   D cdv 23918
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1890  ax-4 1904  ax-5 2005  ax-6 2069  ax-7 2105  ax-8 2157  ax-9 2164  ax-10 2183  ax-11 2198  ax-12 2211  ax-13 2352  ax-ext 2743  ax-rep 4930  ax-sep 4941  ax-nul 4949  ax-pow 5001  ax-pr 5062  ax-un 7147  ax-inf2 8753  ax-cnex 10245  ax-resscn 10246  ax-1cn 10247  ax-icn 10248  ax-addcl 10249  ax-addrcl 10250  ax-mulcl 10251  ax-mulrcl 10252  ax-mulcom 10253  ax-addass 10254  ax-mulass 10255  ax-distr 10256  ax-i2m1 10257  ax-1ne0 10258  ax-1rid 10259  ax-rnegex 10260  ax-rrecex 10261  ax-cnre 10262  ax-pre-lttri 10263  ax-pre-lttrn 10264  ax-pre-ltadd 10265  ax-pre-mulgt0 10266  ax-pre-sup 10267  ax-addf 10268  ax-mulf 10269
This theorem depends on definitions:  df-bi 198  df-an 385  df-or 874  df-3or 1108  df-3an 1109  df-tru 1656  df-ex 1875  df-nf 1879  df-sb 2062  df-mo 2565  df-eu 2582  df-clab 2752  df-cleq 2758  df-clel 2761  df-nfc 2896  df-ne 2938  df-nel 3041  df-ral 3060  df-rex 3061  df-reu 3062  df-rmo 3063  df-rab 3064  df-v 3352  df-sbc 3597  df-csb 3692  df-dif 3735  df-un 3737  df-in 3739  df-ss 3746  df-pss 3748  df-nul 4080  df-if 4244  df-pw 4317  df-sn 4335  df-pr 4337  df-tp 4339  df-op 4341  df-uni 4595  df-int 4634  df-iun 4678  df-iin 4679  df-br 4810  df-opab 4872  df-mpt 4889  df-tr 4912  df-id 5185  df-eprel 5190  df-po 5198  df-so 5199  df-fr 5236  df-se 5237  df-we 5238  df-xp 5283  df-rel 5284  df-cnv 5285  df-co 5286  df-dm 5287  df-rn 5288  df-res 5289  df-ima 5290  df-pred 5865  df-ord 5911  df-on 5912  df-lim 5913  df-suc 5914  df-iota 6031  df-fun 6070  df-fn 6071  df-f 6072  df-f1 6073  df-fo 6074  df-f1o 6075  df-fv 6076  df-isom 6077  df-riota 6803  df-ov 6845  df-oprab 6846  df-mpt2 6847  df-of 7095  df-om 7264  df-1st 7366  df-2nd 7367  df-supp 7498  df-wrecs 7610  df-recs 7672  df-rdg 7710  df-1o 7764  df-2o 7765  df-oadd 7768  df-er 7947  df-map 8062  df-pm 8063  df-ixp 8114  df-en 8161  df-dom 8162  df-sdom 8163  df-fin 8164  df-fsupp 8483  df-fi 8524  df-sup 8555  df-inf 8556  df-oi 8622  df-card 9016  df-cda 9243  df-pnf 10330  df-mnf 10331  df-xr 10332  df-ltxr 10333  df-le 10334  df-sub 10522  df-neg 10523  df-div 10939  df-nn 11275  df-2 11335  df-3 11336  df-4 11337  df-5 11338  df-6 11339  df-7 11340  df-8 11341  df-9 11342  df-n0 11539  df-z 11625  df-dec 11741  df-uz 11887  df-q 11990  df-rp 12029  df-xneg 12146  df-xadd 12147  df-xmul 12148  df-ioo 12381  df-ico 12383  df-icc 12384  df-fz 12534  df-fzo 12674  df-seq 13009  df-exp 13068  df-hash 13322  df-cj 14126  df-re 14127  df-im 14128  df-sqrt 14262  df-abs 14263  df-struct 16134  df-ndx 16135  df-slot 16136  df-base 16138  df-sets 16139  df-ress 16140  df-plusg 16229  df-mulr 16230  df-starv 16231  df-sca 16232  df-vsca 16233  df-ip 16234  df-tset 16235  df-ple 16236  df-ds 16238  df-unif 16239  df-hom 16240  df-cco 16241  df-rest 16351  df-topn 16352  df-0g 16370  df-gsum 16371  df-topgen 16372  df-pt 16373  df-prds 16376  df-xrs 16430  df-qtop 16435  df-imas 16436  df-xps 16438  df-mre 16514  df-mrc 16515  df-acs 16517  df-mgm 17510  df-sgrp 17552  df-mnd 17563  df-submnd 17604  df-mulg 17810  df-cntz 18015  df-cmn 18461  df-psmet 20011  df-xmet 20012  df-met 20013  df-bl 20014  df-mopn 20015  df-fbas 20016  df-fg 20017  df-cnfld 20020  df-top 20978  df-topon 20995  df-topsp 21017  df-bases 21030  df-cld 21103  df-ntr 21104  df-cls 21105  df-nei 21182  df-lp 21220  df-perf 21221  df-cn 21311  df-cnp 21312  df-haus 21399  df-cmp 21470  df-tx 21645  df-hmeo 21838  df-fil 21929  df-fm 22021  df-flim 22022  df-flf 22023  df-xms 22404  df-ms 22405  df-tms 22406  df-cncf 22960  df-limc 23921  df-dv 23922
This theorem is referenced by:  cmvth  24045  lhop1lem  24067
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