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Mathbox for Thierry Arnoux |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > coinflippv | Structured version Visualization version GIF version |
Description: The probability of heads is one-half. (Contributed by Thierry Arnoux, 15-Jan-2017.) |
Ref | Expression |
---|---|
coinflip.h | ⊢ 𝐻 ∈ V |
coinflip.t | ⊢ 𝑇 ∈ V |
coinflip.th | ⊢ 𝐻 ≠ 𝑇 |
coinflip.2 | ⊢ 𝑃 = ((♯ ↾ 𝒫 {𝐻, 𝑇}) ∘f/c / 2) |
coinflip.3 | ⊢ 𝑋 = {〈𝐻, 1〉, 〈𝑇, 0〉} |
Ref | Expression |
---|---|
coinflippv | ⊢ (𝑃‘{𝐻}) = (1 / 2) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | coinflip.2 | . . 3 ⊢ 𝑃 = ((♯ ↾ 𝒫 {𝐻, 𝑇}) ∘f/c / 2) | |
2 | 1 | fveq1i 6908 | . 2 ⊢ (𝑃‘{𝐻}) = (((♯ ↾ 𝒫 {𝐻, 𝑇}) ∘f/c / 2)‘{𝐻}) |
3 | snsspr1 4819 | . . 3 ⊢ {𝐻} ⊆ {𝐻, 𝑇} | |
4 | prex 5443 | . . . . 5 ⊢ {𝐻, 𝑇} ∈ V | |
5 | 4 | elpw2 5340 | . . . 4 ⊢ ({𝐻} ∈ 𝒫 {𝐻, 𝑇} ↔ {𝐻} ⊆ {𝐻, 𝑇}) |
6 | 5 | biimpri 228 | . . 3 ⊢ ({𝐻} ⊆ {𝐻, 𝑇} → {𝐻} ∈ 𝒫 {𝐻, 𝑇}) |
7 | fveq2 6907 | . . . . . 6 ⊢ (𝑥 = {𝐻} → (♯‘𝑥) = (♯‘{𝐻})) | |
8 | coinflip.h | . . . . . . 7 ⊢ 𝐻 ∈ V | |
9 | hashsng 14405 | . . . . . . 7 ⊢ (𝐻 ∈ V → (♯‘{𝐻}) = 1) | |
10 | 8, 9 | ax-mp 5 | . . . . . 6 ⊢ (♯‘{𝐻}) = 1 |
11 | 7, 10 | eqtrdi 2791 | . . . . 5 ⊢ (𝑥 = {𝐻} → (♯‘𝑥) = 1) |
12 | 11 | oveq1d 7446 | . . . 4 ⊢ (𝑥 = {𝐻} → ((♯‘𝑥) / 2) = (1 / 2)) |
13 | 4 | pwex 5386 | . . . . . . 7 ⊢ 𝒫 {𝐻, 𝑇} ∈ V |
14 | 13 | a1i 11 | . . . . . 6 ⊢ (𝐻 ∈ V → 𝒫 {𝐻, 𝑇} ∈ V) |
15 | 2nn0 12541 | . . . . . . 7 ⊢ 2 ∈ ℕ0 | |
16 | 15 | a1i 11 | . . . . . 6 ⊢ (𝐻 ∈ V → 2 ∈ ℕ0) |
17 | prfi 9361 | . . . . . . . . 9 ⊢ {𝐻, 𝑇} ∈ Fin | |
18 | elpwi 4612 | . . . . . . . . 9 ⊢ (𝑥 ∈ 𝒫 {𝐻, 𝑇} → 𝑥 ⊆ {𝐻, 𝑇}) | |
19 | ssfi 9212 | . . . . . . . . 9 ⊢ (({𝐻, 𝑇} ∈ Fin ∧ 𝑥 ⊆ {𝐻, 𝑇}) → 𝑥 ∈ Fin) | |
20 | 17, 18, 19 | sylancr 587 | . . . . . . . 8 ⊢ (𝑥 ∈ 𝒫 {𝐻, 𝑇} → 𝑥 ∈ Fin) |
21 | 20 | adantl 481 | . . . . . . 7 ⊢ ((𝐻 ∈ V ∧ 𝑥 ∈ 𝒫 {𝐻, 𝑇}) → 𝑥 ∈ Fin) |
22 | hashcl 14392 | . . . . . . 7 ⊢ (𝑥 ∈ Fin → (♯‘𝑥) ∈ ℕ0) | |
23 | 21, 22 | syl 17 | . . . . . 6 ⊢ ((𝐻 ∈ V ∧ 𝑥 ∈ 𝒫 {𝐻, 𝑇}) → (♯‘𝑥) ∈ ℕ0) |
24 | hashf 14374 | . . . . . . . 8 ⊢ ♯:V⟶(ℕ0 ∪ {+∞}) | |
25 | 24 | a1i 11 | . . . . . . 7 ⊢ (𝐻 ∈ V → ♯:V⟶(ℕ0 ∪ {+∞})) |
26 | ssv 4020 | . . . . . . . 8 ⊢ 𝒫 {𝐻, 𝑇} ⊆ V | |
27 | 26 | a1i 11 | . . . . . . 7 ⊢ (𝐻 ∈ V → 𝒫 {𝐻, 𝑇} ⊆ V) |
28 | 25, 27 | feqresmpt 6978 | . . . . . 6 ⊢ (𝐻 ∈ V → (♯ ↾ 𝒫 {𝐻, 𝑇}) = (𝑥 ∈ 𝒫 {𝐻, 𝑇} ↦ (♯‘𝑥))) |
29 | 14, 16, 23, 28 | ofcfval2 34085 | . . . . 5 ⊢ (𝐻 ∈ V → ((♯ ↾ 𝒫 {𝐻, 𝑇}) ∘f/c / 2) = (𝑥 ∈ 𝒫 {𝐻, 𝑇} ↦ ((♯‘𝑥) / 2))) |
30 | 8, 29 | ax-mp 5 | . . . 4 ⊢ ((♯ ↾ 𝒫 {𝐻, 𝑇}) ∘f/c / 2) = (𝑥 ∈ 𝒫 {𝐻, 𝑇} ↦ ((♯‘𝑥) / 2)) |
31 | ovex 7464 | . . . 4 ⊢ (1 / 2) ∈ V | |
32 | 12, 30, 31 | fvmpt 7016 | . . 3 ⊢ ({𝐻} ∈ 𝒫 {𝐻, 𝑇} → (((♯ ↾ 𝒫 {𝐻, 𝑇}) ∘f/c / 2)‘{𝐻}) = (1 / 2)) |
33 | 3, 6, 32 | mp2b 10 | . 2 ⊢ (((♯ ↾ 𝒫 {𝐻, 𝑇}) ∘f/c / 2)‘{𝐻}) = (1 / 2) |
34 | 2, 33 | eqtri 2763 | 1 ⊢ (𝑃‘{𝐻}) = (1 / 2) |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 395 = wceq 1537 ∈ wcel 2106 ≠ wne 2938 Vcvv 3478 ∪ cun 3961 ⊆ wss 3963 𝒫 cpw 4605 {csn 4631 {cpr 4633 〈cop 4637 ↦ cmpt 5231 ↾ cres 5691 ⟶wf 6559 ‘cfv 6563 (class class class)co 7431 Fincfn 8984 0cc0 11153 1c1 11154 +∞cpnf 11290 / cdiv 11918 2c2 12319 ℕ0cn0 12524 ♯chash 14366 ∘f/c cofc 34076 |
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-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 |
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-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-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-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 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-en 8985 df-dom 8986 df-sdom 8987 df-fin 8988 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-nn 12265 df-2 12327 df-n0 12525 df-xnn0 12598 df-z 12612 df-uz 12877 df-fz 13545 df-hash 14367 df-ofc 34077 |
This theorem is referenced by: coinflippvt 34466 |
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