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Theorem sitgfval 31607
Description: Value of the Bochner integral for a simple function 𝐹. (Contributed by Thierry Arnoux, 30-Jan-2018.)
Hypotheses
Ref Expression
sitgval.b 𝐵 = (Base‘𝑊)
sitgval.j 𝐽 = (TopOpen‘𝑊)
sitgval.s 𝑆 = (sigaGen‘𝐽)
sitgval.0 0 = (0g𝑊)
sitgval.x · = ( ·𝑠𝑊)
sitgval.h 𝐻 = (ℝHom‘(Scalar‘𝑊))
sitgval.1 (𝜑𝑊𝑉)
sitgval.2 (𝜑𝑀 ran measures)
sibfmbl.1 (𝜑𝐹 ∈ dom (𝑊sitg𝑀))
Assertion
Ref Expression
sitgfval (𝜑 → ((𝑊sitg𝑀)‘𝐹) = (𝑊 Σg (𝑥 ∈ (ran 𝐹 ∖ { 0 }) ↦ ((𝐻‘(𝑀‘(𝐹 “ {𝑥}))) · 𝑥))))
Distinct variable groups:   𝑥,𝐹   𝑥,𝑀   𝑥,𝑊   𝑥, 0   𝜑,𝑥
Allowed substitution hints:   𝐵(𝑥)   𝑆(𝑥)   · (𝑥)   𝐻(𝑥)   𝐽(𝑥)   𝑉(𝑥)

Proof of Theorem sitgfval
Dummy variables 𝑓 𝑔 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 sitgval.b . . 3 𝐵 = (Base‘𝑊)
2 sitgval.j . . 3 𝐽 = (TopOpen‘𝑊)
3 sitgval.s . . 3 𝑆 = (sigaGen‘𝐽)
4 sitgval.0 . . 3 0 = (0g𝑊)
5 sitgval.x . . 3 · = ( ·𝑠𝑊)
6 sitgval.h . . 3 𝐻 = (ℝHom‘(Scalar‘𝑊))
7 sitgval.1 . . 3 (𝜑𝑊𝑉)
8 sitgval.2 . . 3 (𝜑𝑀 ran measures)
91, 2, 3, 4, 5, 6, 7, 8sitgval 31598 . 2 (𝜑 → (𝑊sitg𝑀) = (𝑓 ∈ {𝑔 ∈ (dom 𝑀MblFnM𝑆) ∣ (ran 𝑔 ∈ Fin ∧ ∀𝑥 ∈ (ran 𝑔 ∖ { 0 })(𝑀‘(𝑔 “ {𝑥})) ∈ (0[,)+∞))} ↦ (𝑊 Σg (𝑥 ∈ (ran 𝑓 ∖ { 0 }) ↦ ((𝐻‘(𝑀‘(𝑓 “ {𝑥}))) · 𝑥)))))
10 simpr 487 . . . . . 6 ((𝜑𝑓 = 𝐹) → 𝑓 = 𝐹)
1110rneqd 5784 . . . . 5 ((𝜑𝑓 = 𝐹) → ran 𝑓 = ran 𝐹)
1211difeq1d 4077 . . . 4 ((𝜑𝑓 = 𝐹) → (ran 𝑓 ∖ { 0 }) = (ran 𝐹 ∖ { 0 }))
1310cnveqd 5722 . . . . . . . 8 ((𝜑𝑓 = 𝐹) → 𝑓 = 𝐹)
1413imaeq1d 5904 . . . . . . 7 ((𝜑𝑓 = 𝐹) → (𝑓 “ {𝑥}) = (𝐹 “ {𝑥}))
1514fveq2d 6650 . . . . . 6 ((𝜑𝑓 = 𝐹) → (𝑀‘(𝑓 “ {𝑥})) = (𝑀‘(𝐹 “ {𝑥})))
1615fveq2d 6650 . . . . 5 ((𝜑𝑓 = 𝐹) → (𝐻‘(𝑀‘(𝑓 “ {𝑥}))) = (𝐻‘(𝑀‘(𝐹 “ {𝑥}))))
1716oveq1d 7148 . . . 4 ((𝜑𝑓 = 𝐹) → ((𝐻‘(𝑀‘(𝑓 “ {𝑥}))) · 𝑥) = ((𝐻‘(𝑀‘(𝐹 “ {𝑥}))) · 𝑥))
1812, 17mpteq12dv 5127 . . 3 ((𝜑𝑓 = 𝐹) → (𝑥 ∈ (ran 𝑓 ∖ { 0 }) ↦ ((𝐻‘(𝑀‘(𝑓 “ {𝑥}))) · 𝑥)) = (𝑥 ∈ (ran 𝐹 ∖ { 0 }) ↦ ((𝐻‘(𝑀‘(𝐹 “ {𝑥}))) · 𝑥)))
1918oveq2d 7149 . 2 ((𝜑𝑓 = 𝐹) → (𝑊 Σg (𝑥 ∈ (ran 𝑓 ∖ { 0 }) ↦ ((𝐻‘(𝑀‘(𝑓 “ {𝑥}))) · 𝑥))) = (𝑊 Σg (𝑥 ∈ (ran 𝐹 ∖ { 0 }) ↦ ((𝐻‘(𝑀‘(𝐹 “ {𝑥}))) · 𝑥))))
20 sibfmbl.1 . . . . 5 (𝜑𝐹 ∈ dom (𝑊sitg𝑀))
211, 2, 3, 4, 5, 6, 7, 8, 20sibfmbl 31601 . . . 4 (𝜑𝐹 ∈ (dom 𝑀MblFnM𝑆))
221, 2, 3, 4, 5, 6, 7, 8, 20sibfrn 31603 . . . 4 (𝜑 → ran 𝐹 ∈ Fin)
231, 2, 3, 4, 5, 6, 7, 8, 20sibfima 31604 . . . . 5 ((𝜑𝑥 ∈ (ran 𝐹 ∖ { 0 })) → (𝑀‘(𝐹 “ {𝑥})) ∈ (0[,)+∞))
2423ralrimiva 3169 . . . 4 (𝜑 → ∀𝑥 ∈ (ran 𝐹 ∖ { 0 })(𝑀‘(𝐹 “ {𝑥})) ∈ (0[,)+∞))
2521, 22, 24jca32 518 . . 3 (𝜑 → (𝐹 ∈ (dom 𝑀MblFnM𝑆) ∧ (ran 𝐹 ∈ Fin ∧ ∀𝑥 ∈ (ran 𝐹 ∖ { 0 })(𝑀‘(𝐹 “ {𝑥})) ∈ (0[,)+∞))))
26 rneq 5782 . . . . . 6 (𝑔 = 𝐹 → ran 𝑔 = ran 𝐹)
2726eleq1d 2895 . . . . 5 (𝑔 = 𝐹 → (ran 𝑔 ∈ Fin ↔ ran 𝐹 ∈ Fin))
2826difeq1d 4077 . . . . . 6 (𝑔 = 𝐹 → (ran 𝑔 ∖ { 0 }) = (ran 𝐹 ∖ { 0 }))
29 cnveq 5720 . . . . . . . . 9 (𝑔 = 𝐹𝑔 = 𝐹)
3029imaeq1d 5904 . . . . . . . 8 (𝑔 = 𝐹 → (𝑔 “ {𝑥}) = (𝐹 “ {𝑥}))
3130fveq2d 6650 . . . . . . 7 (𝑔 = 𝐹 → (𝑀‘(𝑔 “ {𝑥})) = (𝑀‘(𝐹 “ {𝑥})))
3231eleq1d 2895 . . . . . 6 (𝑔 = 𝐹 → ((𝑀‘(𝑔 “ {𝑥})) ∈ (0[,)+∞) ↔ (𝑀‘(𝐹 “ {𝑥})) ∈ (0[,)+∞)))
3328, 32raleqbidv 3388 . . . . 5 (𝑔 = 𝐹 → (∀𝑥 ∈ (ran 𝑔 ∖ { 0 })(𝑀‘(𝑔 “ {𝑥})) ∈ (0[,)+∞) ↔ ∀𝑥 ∈ (ran 𝐹 ∖ { 0 })(𝑀‘(𝐹 “ {𝑥})) ∈ (0[,)+∞)))
3427, 33anbi12d 632 . . . 4 (𝑔 = 𝐹 → ((ran 𝑔 ∈ Fin ∧ ∀𝑥 ∈ (ran 𝑔 ∖ { 0 })(𝑀‘(𝑔 “ {𝑥})) ∈ (0[,)+∞)) ↔ (ran 𝐹 ∈ Fin ∧ ∀𝑥 ∈ (ran 𝐹 ∖ { 0 })(𝑀‘(𝐹 “ {𝑥})) ∈ (0[,)+∞))))
3534elrab 3660 . . 3 (𝐹 ∈ {𝑔 ∈ (dom 𝑀MblFnM𝑆) ∣ (ran 𝑔 ∈ Fin ∧ ∀𝑥 ∈ (ran 𝑔 ∖ { 0 })(𝑀‘(𝑔 “ {𝑥})) ∈ (0[,)+∞))} ↔ (𝐹 ∈ (dom 𝑀MblFnM𝑆) ∧ (ran 𝐹 ∈ Fin ∧ ∀𝑥 ∈ (ran 𝐹 ∖ { 0 })(𝑀‘(𝐹 “ {𝑥})) ∈ (0[,)+∞))))
3625, 35sylibr 236 . 2 (𝜑𝐹 ∈ {𝑔 ∈ (dom 𝑀MblFnM𝑆) ∣ (ran 𝑔 ∈ Fin ∧ ∀𝑥 ∈ (ran 𝑔 ∖ { 0 })(𝑀‘(𝑔 “ {𝑥})) ∈ (0[,)+∞))})
37 ovexd 7168 . 2 (𝜑 → (𝑊 Σg (𝑥 ∈ (ran 𝐹 ∖ { 0 }) ↦ ((𝐻‘(𝑀‘(𝐹 “ {𝑥}))) · 𝑥))) ∈ V)
389, 19, 36, 37fvmptd 6751 1 (𝜑 → ((𝑊sitg𝑀)‘𝐹) = (𝑊 Σg (𝑥 ∈ (ran 𝐹 ∖ { 0 }) ↦ ((𝐻‘(𝑀‘(𝐹 “ {𝑥}))) · 𝑥))))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 398   = wceq 1537  wcel 2114  wral 3125  {crab 3129  Vcvv 3473  cdif 3910  {csn 4543   cuni 4814  cmpt 5122  ccnv 5530  dom cdm 5531  ran crn 5532  cima 5534  cfv 6331  (class class class)co 7133  Fincfn 8487  0cc0 10515  +∞cpnf 10650  [,)cico 12719  Basecbs 16462  Scalarcsca 16547   ·𝑠 cvsca 16548  TopOpenctopn 16674  0gc0g 16692   Σg cgsu 16693  ℝHomcrrh 31242  sigaGencsigagen 31405  measurescmeas 31462  MblFnMcmbfm 31516  sitgcsitg 31595
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2792  ax-rep 5166  ax-sep 5179  ax-nul 5186  ax-pr 5306
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2653  df-clab 2799  df-cleq 2813  df-clel 2891  df-nfc 2959  df-ne 3007  df-ral 3130  df-rex 3131  df-reu 3132  df-rab 3134  df-v 3475  df-sbc 3753  df-csb 3861  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4270  df-if 4444  df-sn 4544  df-pr 4546  df-op 4550  df-uni 4815  df-iun 4897  df-br 5043  df-opab 5105  df-mpt 5123  df-id 5436  df-xp 5537  df-rel 5538  df-cnv 5539  df-co 5540  df-dm 5541  df-rn 5542  df-res 5543  df-ima 5544  df-iota 6290  df-fun 6333  df-fn 6334  df-f 6335  df-f1 6336  df-fo 6337  df-f1o 6338  df-fv 6339  df-ov 7136  df-oprab 7137  df-mpo 7138  df-sitg 31596
This theorem is referenced by:  sitgclg  31608  sitg0  31612
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