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| Mirrors > Home > MPE Home > Th. List > Mathboxes > ballotlemfval0 | Structured version Visualization version GIF version | ||
| Description: (𝐹‘𝐶) always starts counting at 0 . (Contributed by Thierry Arnoux, 25-Nov-2016.) |
| Ref | Expression |
|---|---|
| ballotth.m | ⊢ 𝑀 ∈ ℕ |
| ballotth.n | ⊢ 𝑁 ∈ ℕ |
| ballotth.o | ⊢ 𝑂 = {𝑐 ∈ 𝒫 (1...(𝑀 + 𝑁)) ∣ (♯‘𝑐) = 𝑀} |
| ballotth.p | ⊢ 𝑃 = (𝑥 ∈ 𝒫 𝑂 ↦ ((♯‘𝑥) / (♯‘𝑂))) |
| ballotth.f | ⊢ 𝐹 = (𝑐 ∈ 𝑂 ↦ (𝑖 ∈ ℤ ↦ ((♯‘((1...𝑖) ∩ 𝑐)) − (♯‘((1...𝑖) ∖ 𝑐))))) |
| Ref | Expression |
|---|---|
| ballotlemfval0 | ⊢ (𝐶 ∈ 𝑂 → ((𝐹‘𝐶)‘0) = 0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ballotth.m | . . 3 ⊢ 𝑀 ∈ ℕ | |
| 2 | ballotth.n | . . 3 ⊢ 𝑁 ∈ ℕ | |
| 3 | ballotth.o | . . 3 ⊢ 𝑂 = {𝑐 ∈ 𝒫 (1...(𝑀 + 𝑁)) ∣ (♯‘𝑐) = 𝑀} | |
| 4 | ballotth.p | . . 3 ⊢ 𝑃 = (𝑥 ∈ 𝒫 𝑂 ↦ ((♯‘𝑥) / (♯‘𝑂))) | |
| 5 | ballotth.f | . . 3 ⊢ 𝐹 = (𝑐 ∈ 𝑂 ↦ (𝑖 ∈ ℤ ↦ ((♯‘((1...𝑖) ∩ 𝑐)) − (♯‘((1...𝑖) ∖ 𝑐))))) | |
| 6 | id 22 | . . 3 ⊢ (𝐶 ∈ 𝑂 → 𝐶 ∈ 𝑂) | |
| 7 | 0zd 12536 | . . 3 ⊢ (𝐶 ∈ 𝑂 → 0 ∈ ℤ) | |
| 8 | 1, 2, 3, 4, 5, 6, 7 | ballotlemfval 34634 | . 2 ⊢ (𝐶 ∈ 𝑂 → ((𝐹‘𝐶)‘0) = ((♯‘((1...0) ∩ 𝐶)) − (♯‘((1...0) ∖ 𝐶)))) |
| 9 | fz10 13499 | . . . . . . . 8 ⊢ (1...0) = ∅ | |
| 10 | 9 | ineq1i 4156 | . . . . . . 7 ⊢ ((1...0) ∩ 𝐶) = (∅ ∩ 𝐶) |
| 11 | incom 4149 | . . . . . . 7 ⊢ (𝐶 ∩ ∅) = (∅ ∩ 𝐶) | |
| 12 | in0 4335 | . . . . . . 7 ⊢ (𝐶 ∩ ∅) = ∅ | |
| 13 | 10, 11, 12 | 3eqtr2i 2765 | . . . . . 6 ⊢ ((1...0) ∩ 𝐶) = ∅ |
| 14 | 13 | fveq2i 6843 | . . . . 5 ⊢ (♯‘((1...0) ∩ 𝐶)) = (♯‘∅) |
| 15 | hash0 14329 | . . . . 5 ⊢ (♯‘∅) = 0 | |
| 16 | 14, 15 | eqtri 2759 | . . . 4 ⊢ (♯‘((1...0) ∩ 𝐶)) = 0 |
| 17 | 9 | difeq1i 4062 | . . . . . . 7 ⊢ ((1...0) ∖ 𝐶) = (∅ ∖ 𝐶) |
| 18 | 0dif 4345 | . . . . . . 7 ⊢ (∅ ∖ 𝐶) = ∅ | |
| 19 | 17, 18 | eqtri 2759 | . . . . . 6 ⊢ ((1...0) ∖ 𝐶) = ∅ |
| 20 | 19 | fveq2i 6843 | . . . . 5 ⊢ (♯‘((1...0) ∖ 𝐶)) = (♯‘∅) |
| 21 | 20, 15 | eqtri 2759 | . . . 4 ⊢ (♯‘((1...0) ∖ 𝐶)) = 0 |
| 22 | 16, 21 | oveq12i 7379 | . . 3 ⊢ ((♯‘((1...0) ∩ 𝐶)) − (♯‘((1...0) ∖ 𝐶))) = (0 − 0) |
| 23 | 0m0e0 12296 | . . 3 ⊢ (0 − 0) = 0 | |
| 24 | 22, 23 | eqtri 2759 | . 2 ⊢ ((♯‘((1...0) ∩ 𝐶)) − (♯‘((1...0) ∖ 𝐶))) = 0 |
| 25 | 8, 24 | eqtrdi 2787 | 1 ⊢ (𝐶 ∈ 𝑂 → ((𝐹‘𝐶)‘0) = 0) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 {crab 3389 ∖ cdif 3886 ∩ cin 3888 ∅c0 4273 𝒫 cpw 4541 ↦ cmpt 5166 ‘cfv 6498 (class class class)co 7367 0cc0 11038 1c1 11039 + caddc 11041 − cmin 11377 / cdiv 11807 ℕcn 12174 ℤcz 12524 ...cfz 13461 ♯chash 14292 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-int 4890 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-1st 7942 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-1o 8405 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-fin 8897 df-card 9863 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-nn 12175 df-n0 12438 df-z 12525 df-uz 12789 df-fz 13462 df-hash 14293 |
| This theorem is referenced by: ballotlem4 34643 ballotlemi1 34647 ballotlemii 34648 ballotlemic 34651 ballotlem1c 34652 |
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