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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 1541 | . . 3 ⊢ ⊤ | |
2 | 0fi 9081 | . . . . . 6 ⊢ ∅ ∈ Fin | |
3 | 2 | a1i 11 | . . . . 5 ⊢ (⊤ → ∅ ∈ Fin) |
4 | 3 | ovnf 46519 | . . . 4 ⊢ (⊤ → (voln*‘∅):𝒫 (ℝ ↑m ∅)⟶(0[,]+∞)) |
5 | 4 | feqmptd 6977 | . . 3 ⊢ (⊤ → (voln*‘∅) = (𝑥 ∈ 𝒫 (ℝ ↑m ∅) ↦ ((voln*‘∅)‘𝑥))) |
6 | 1, 5 | ax-mp 5 | . 2 ⊢ (voln*‘∅) = (𝑥 ∈ 𝒫 (ℝ ↑m ∅) ↦ ((voln*‘∅)‘𝑥)) |
7 | reex 11244 | . . . . 5 ⊢ ℝ ∈ V | |
8 | mapdm0 8881 | . . . . 5 ⊢ (ℝ ∈ V → (ℝ ↑m ∅) = {∅}) | |
9 | 7, 8 | ax-mp 5 | . . . 4 ⊢ (ℝ ↑m ∅) = {∅} |
10 | 9 | pweqi 4621 | . . 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 4612 | . . . . 5 ⊢ (𝑥 ∈ 𝒫 {∅} → 𝑥 ⊆ {∅}) | |
14 | 9 | eqcomi 2744 | . . . . . 6 ⊢ {∅} = (ℝ ↑m ∅) |
15 | 14 | a1i 11 | . . . . 5 ⊢ (𝑥 ∈ 𝒫 {∅} → {∅} = (ℝ ↑m ∅)) |
16 | 13, 15 | sseqtrd 4036 | . . . 4 ⊢ (𝑥 ∈ 𝒫 {∅} → 𝑥 ⊆ (ℝ ↑m ∅)) |
17 | 16 | ovn0val 46506 | . . 3 ⊢ (𝑥 ∈ 𝒫 {∅} → ((voln*‘∅)‘𝑥) = 0) |
18 | 17 | mpteq2ia 5251 | . 2 ⊢ (𝑥 ∈ 𝒫 {∅} ↦ ((voln*‘∅)‘𝑥)) = (𝑥 ∈ 𝒫 {∅} ↦ 0) |
19 | 6, 12, 18 | 3eqtri 2767 | 1 ⊢ (voln*‘∅) = (𝑥 ∈ 𝒫 {∅} ↦ 0) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1537 ⊤wtru 1538 ∈ wcel 2106 Vcvv 3478 ∅c0 4339 𝒫 cpw 4605 {csn 4631 ↦ cmpt 5231 ‘cfv 6563 (class class class)co 7431 ↑m cmap 8865 Fincfn 8984 ℝcr 11152 0cc0 11153 +∞cpnf 11290 [,]cicc 13387 voln*covoln 46492 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-rep 5285 ax-sep 5302 ax-nul 5312 ax-pow 5371 ax-pr 5438 ax-un 7754 ax-inf2 9679 ax-cnex 11209 ax-resscn 11210 ax-1cn 11211 ax-icn 11212 ax-addcl 11213 ax-addrcl 11214 ax-mulcl 11215 ax-mulrcl 11216 ax-mulcom 11217 ax-addass 11218 ax-mulass 11219 ax-distr 11220 ax-i2m1 11221 ax-1ne0 11222 ax-1rid 11223 ax-rnegex 11224 ax-rrecex 11225 ax-cnre 11226 ax-pre-lttri 11227 ax-pre-lttrn 11228 ax-pre-ltadd 11229 ax-pre-mulgt0 11230 ax-pre-sup 11231 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-nfc 2890 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3378 df-reu 3379 df-rab 3434 df-v 3480 df-sbc 3792 df-csb 3909 df-dif 3966 df-un 3968 df-in 3970 df-ss 3980 df-pss 3983 df-nul 4340 df-if 4532 df-pw 4607 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-int 4952 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5583 df-eprel 5589 df-po 5597 df-so 5598 df-fr 5641 df-se 5642 df-we 5643 df-xp 5695 df-rel 5696 df-cnv 5697 df-co 5698 df-dm 5699 df-rn 5700 df-res 5701 df-ima 5702 df-pred 6323 df-ord 6389 df-on 6390 df-lim 6391 df-suc 6392 df-iota 6516 df-fun 6565 df-fn 6566 df-f 6567 df-f1 6568 df-fo 6569 df-f1o 6570 df-fv 6571 df-isom 6572 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-of 7697 df-om 7888 df-1st 8013 df-2nd 8014 df-frecs 8305 df-wrecs 8336 df-recs 8410 df-rdg 8449 df-1o 8505 df-2o 8506 df-er 8744 df-map 8867 df-pm 8868 df-ixp 8937 df-en 8985 df-dom 8986 df-sdom 8987 df-fin 8988 df-fi 9449 df-sup 9480 df-inf 9481 df-oi 9548 df-dju 9939 df-card 9977 df-pnf 11295 df-mnf 11296 df-xr 11297 df-ltxr 11298 df-le 11299 df-sub 11492 df-neg 11493 df-div 11919 df-nn 12265 df-2 12327 df-3 12328 df-n0 12525 df-z 12612 df-uz 12877 df-q 12989 df-rp 13033 df-xneg 13152 df-xadd 13153 df-xmul 13154 df-ioo 13388 df-ico 13390 df-icc 13391 df-fz 13545 df-fzo 13692 df-fl 13829 df-seq 14040 df-exp 14100 df-hash 14367 df-cj 15135 df-re 15136 df-im 15137 df-sqrt 15271 df-abs 15272 df-clim 15521 df-rlim 15522 df-sum 15720 df-prod 15937 df-rest 17469 df-topgen 17490 df-psmet 21374 df-xmet 21375 df-met 21376 df-bl 21377 df-mopn 21378 df-top 22916 df-topon 22933 df-bases 22969 df-cmp 23411 df-ovol 25513 df-vol 25514 df-sumge0 46319 df-ovoln 46493 |
This theorem is referenced by: (None) |
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