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Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > ovn02 | Structured version Visualization version GIF version |
Description: For the zero-dimensional space, voln* assigns zero to every subset. (Contributed by Glauco Siliprandi, 11-Oct-2020.) |
Ref | Expression |
---|---|
ovn02 | ⊢ (voln*‘∅) = (𝑥 ∈ 𝒫 {∅} ↦ 0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | tru 1546 | . . 3 ⊢ ⊤ | |
2 | 0fin 9168 | . . . . . 6 ⊢ ∅ ∈ Fin | |
3 | 2 | a1i 11 | . . . . 5 ⊢ (⊤ → ∅ ∈ Fin) |
4 | 3 | ovnf 45266 | . . . 4 ⊢ (⊤ → (voln*‘∅):𝒫 (ℝ ↑m ∅)⟶(0[,]+∞)) |
5 | 4 | feqmptd 6958 | . . 3 ⊢ (⊤ → (voln*‘∅) = (𝑥 ∈ 𝒫 (ℝ ↑m ∅) ↦ ((voln*‘∅)‘𝑥))) |
6 | 1, 5 | ax-mp 5 | . 2 ⊢ (voln*‘∅) = (𝑥 ∈ 𝒫 (ℝ ↑m ∅) ↦ ((voln*‘∅)‘𝑥)) |
7 | reex 11198 | . . . . 5 ⊢ ℝ ∈ V | |
8 | mapdm0 8833 | . . . . 5 ⊢ (ℝ ∈ V → (ℝ ↑m ∅) = {∅}) | |
9 | 7, 8 | ax-mp 5 | . . . 4 ⊢ (ℝ ↑m ∅) = {∅} |
10 | 9 | pweqi 4618 | . . 3 ⊢ 𝒫 (ℝ ↑m ∅) = 𝒫 {∅} |
11 | mpteq1 5241 | . . 3 ⊢ (𝒫 (ℝ ↑m ∅) = 𝒫 {∅} → (𝑥 ∈ 𝒫 (ℝ ↑m ∅) ↦ ((voln*‘∅)‘𝑥)) = (𝑥 ∈ 𝒫 {∅} ↦ ((voln*‘∅)‘𝑥))) | |
12 | 10, 11 | ax-mp 5 | . 2 ⊢ (𝑥 ∈ 𝒫 (ℝ ↑m ∅) ↦ ((voln*‘∅)‘𝑥)) = (𝑥 ∈ 𝒫 {∅} ↦ ((voln*‘∅)‘𝑥)) |
13 | elpwi 4609 | . . . . 5 ⊢ (𝑥 ∈ 𝒫 {∅} → 𝑥 ⊆ {∅}) | |
14 | 9 | eqcomi 2742 | . . . . . 6 ⊢ {∅} = (ℝ ↑m ∅) |
15 | 14 | a1i 11 | . . . . 5 ⊢ (𝑥 ∈ 𝒫 {∅} → {∅} = (ℝ ↑m ∅)) |
16 | 13, 15 | sseqtrd 4022 | . . . 4 ⊢ (𝑥 ∈ 𝒫 {∅} → 𝑥 ⊆ (ℝ ↑m ∅)) |
17 | 16 | ovn0val 45253 | . . 3 ⊢ (𝑥 ∈ 𝒫 {∅} → ((voln*‘∅)‘𝑥) = 0) |
18 | 17 | mpteq2ia 5251 | . 2 ⊢ (𝑥 ∈ 𝒫 {∅} ↦ ((voln*‘∅)‘𝑥)) = (𝑥 ∈ 𝒫 {∅} ↦ 0) |
19 | 6, 12, 18 | 3eqtri 2765 | 1 ⊢ (voln*‘∅) = (𝑥 ∈ 𝒫 {∅} ↦ 0) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1542 ⊤wtru 1543 ∈ wcel 2107 Vcvv 3475 ∅c0 4322 𝒫 cpw 4602 {csn 4628 ↦ cmpt 5231 ‘cfv 6541 (class class class)co 7406 ↑m cmap 8817 Fincfn 8936 ℝcr 11106 0cc0 11107 +∞cpnf 11242 [,]cicc 13324 voln*covoln 45239 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7722 ax-inf2 9633 ax-cnex 11163 ax-resscn 11164 ax-1cn 11165 ax-icn 11166 ax-addcl 11167 ax-addrcl 11168 ax-mulcl 11169 ax-mulrcl 11170 ax-mulcom 11171 ax-addass 11172 ax-mulass 11173 ax-distr 11174 ax-i2m1 11175 ax-1ne0 11176 ax-1rid 11177 ax-rnegex 11178 ax-rrecex 11179 ax-cnre 11180 ax-pre-lttri 11181 ax-pre-lttrn 11182 ax-pre-ltadd 11183 ax-pre-mulgt0 11184 ax-pre-sup 11185 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6298 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6493 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-isom 6550 df-riota 7362 df-ov 7409 df-oprab 7410 df-mpo 7411 df-of 7667 df-om 7853 df-1st 7972 df-2nd 7973 df-frecs 8263 df-wrecs 8294 df-recs 8368 df-rdg 8407 df-1o 8463 df-2o 8464 df-er 8700 df-map 8819 df-pm 8820 df-ixp 8889 df-en 8937 df-dom 8938 df-sdom 8939 df-fin 8940 df-fi 9403 df-sup 9434 df-inf 9435 df-oi 9502 df-dju 9893 df-card 9931 df-pnf 11247 df-mnf 11248 df-xr 11249 df-ltxr 11250 df-le 11251 df-sub 11443 df-neg 11444 df-div 11869 df-nn 12210 df-2 12272 df-3 12273 df-n0 12470 df-z 12556 df-uz 12820 df-q 12930 df-rp 12972 df-xneg 13089 df-xadd 13090 df-xmul 13091 df-ioo 13325 df-ico 13327 df-icc 13328 df-fz 13482 df-fzo 13625 df-fl 13754 df-seq 13964 df-exp 14025 df-hash 14288 df-cj 15043 df-re 15044 df-im 15045 df-sqrt 15179 df-abs 15180 df-clim 15429 df-rlim 15430 df-sum 15630 df-prod 15847 df-rest 17365 df-topgen 17386 df-psmet 20929 df-xmet 20930 df-met 20931 df-bl 20932 df-mopn 20933 df-top 22388 df-topon 22405 df-bases 22441 df-cmp 22883 df-ovol 24973 df-vol 24974 df-sumge0 45066 df-ovoln 45240 |
This theorem is referenced by: (None) |
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