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| Mirrors > Home > MPE Home > Th. List > Mathboxes > ballotlem5 | Structured version Visualization version GIF version | ||
| Description: If A is not ahead throughout, there is a 𝑘 where votes are tied. (Contributed by Thierry Arnoux, 1-Dec-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))))) |
| ballotth.e | ⊢ 𝐸 = {𝑐 ∈ 𝑂 ∣ ∀𝑖 ∈ (1...(𝑀 + 𝑁))0 < ((𝐹‘𝑐)‘𝑖)} |
| ballotth.mgtn | ⊢ 𝑁 < 𝑀 |
| Ref | Expression |
|---|---|
| ballotlem5 | ⊢ (𝐶 ∈ (𝑂 ∖ 𝐸) → ∃𝑘 ∈ (1...(𝑀 + 𝑁))((𝐹‘𝐶)‘𝑘) = 0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ballotth.m | . 2 ⊢ 𝑀 ∈ ℕ | |
| 2 | ballotth.n | . 2 ⊢ 𝑁 ∈ ℕ | |
| 3 | ballotth.o | . 2 ⊢ 𝑂 = {𝑐 ∈ 𝒫 (1...(𝑀 + 𝑁)) ∣ (♯‘𝑐) = 𝑀} | |
| 4 | ballotth.p | . 2 ⊢ 𝑃 = (𝑥 ∈ 𝒫 𝑂 ↦ ((♯‘𝑥) / (♯‘𝑂))) | |
| 5 | ballotth.f | . 2 ⊢ 𝐹 = (𝑐 ∈ 𝑂 ↦ (𝑖 ∈ ℤ ↦ ((♯‘((1...𝑖) ∩ 𝑐)) − (♯‘((1...𝑖) ∖ 𝑐))))) | |
| 6 | eldifi 4063 | . 2 ⊢ (𝐶 ∈ (𝑂 ∖ 𝐸) → 𝐶 ∈ 𝑂) | |
| 7 | 1 | a1i 11 | . . 3 ⊢ (𝐶 ∈ (𝑂 ∖ 𝐸) → 𝑀 ∈ ℕ) |
| 8 | 2 | a1i 11 | . . 3 ⊢ (𝐶 ∈ (𝑂 ∖ 𝐸) → 𝑁 ∈ ℕ) |
| 9 | 7, 8 | nnaddcld 12218 | . 2 ⊢ (𝐶 ∈ (𝑂 ∖ 𝐸) → (𝑀 + 𝑁) ∈ ℕ) |
| 10 | ballotth.e | . . . 4 ⊢ 𝐸 = {𝑐 ∈ 𝑂 ∣ ∀𝑖 ∈ (1...(𝑀 + 𝑁))0 < ((𝐹‘𝑐)‘𝑖)} | |
| 11 | 1, 2, 3, 4, 5, 10 | ballotlemodife 34630 | . . 3 ⊢ (𝐶 ∈ (𝑂 ∖ 𝐸) ↔ (𝐶 ∈ 𝑂 ∧ ∃𝑖 ∈ (1...(𝑀 + 𝑁))((𝐹‘𝐶)‘𝑖) ≤ 0)) |
| 12 | 11 | simprbi 497 | . 2 ⊢ (𝐶 ∈ (𝑂 ∖ 𝐸) → ∃𝑖 ∈ (1...(𝑀 + 𝑁))((𝐹‘𝐶)‘𝑖) ≤ 0) |
| 13 | ballotth.mgtn | . . . 4 ⊢ 𝑁 < 𝑀 | |
| 14 | 2 | nnrei 12172 | . . . . 5 ⊢ 𝑁 ∈ ℝ |
| 15 | 1 | nnrei 12172 | . . . . 5 ⊢ 𝑀 ∈ ℝ |
| 16 | 14, 15 | posdifi 11689 | . . . 4 ⊢ (𝑁 < 𝑀 ↔ 0 < (𝑀 − 𝑁)) |
| 17 | 13, 16 | mpbi 230 | . . 3 ⊢ 0 < (𝑀 − 𝑁) |
| 18 | 1, 2, 3, 4, 5 | ballotlemfmpn 34627 | . . . 4 ⊢ (𝐶 ∈ 𝑂 → ((𝐹‘𝐶)‘(𝑀 + 𝑁)) = (𝑀 − 𝑁)) |
| 19 | 6, 18 | syl 17 | . . 3 ⊢ (𝐶 ∈ (𝑂 ∖ 𝐸) → ((𝐹‘𝐶)‘(𝑀 + 𝑁)) = (𝑀 − 𝑁)) |
| 20 | 17, 19 | breqtrrid 5112 | . 2 ⊢ (𝐶 ∈ (𝑂 ∖ 𝐸) → 0 < ((𝐹‘𝐶)‘(𝑀 + 𝑁))) |
| 21 | 1, 2, 3, 4, 5, 6, 9, 12, 20 | ballotlemfc0 34625 | 1 ⊢ (𝐶 ∈ (𝑂 ∖ 𝐸) → ∃𝑘 ∈ (1...(𝑀 + 𝑁))((𝐹‘𝐶)‘𝑘) = 0) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 ∀wral 3049 ∃wrex 3059 {crab 3387 ∖ cdif 3882 ∩ cin 3884 𝒫 cpw 4531 class class class wbr 5074 ↦ cmpt 5155 ‘cfv 6487 (class class class)co 7356 0cc0 11027 1c1 11028 + caddc 11030 < clt 11168 ≤ cle 11169 − cmin 11366 / cdiv 11796 ℕcn 12163 ℤcz 12513 ...cfz 13450 ♯chash 14281 |
| 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 2184 ax-ext 2707 ax-rep 5201 ax-sep 5220 ax-nul 5230 ax-pow 5296 ax-pr 5364 ax-un 7678 ax-cnex 11083 ax-resscn 11084 ax-1cn 11085 ax-icn 11086 ax-addcl 11087 ax-addrcl 11088 ax-mulcl 11089 ax-mulrcl 11090 ax-mulcom 11091 ax-addass 11092 ax-mulass 11093 ax-distr 11094 ax-i2m1 11095 ax-1ne0 11096 ax-1rid 11097 ax-rnegex 11098 ax-rrecex 11099 ax-cnre 11100 ax-pre-lttri 11101 ax-pre-lttrn 11102 ax-pre-ltadd 11103 ax-pre-mulgt0 11104 |
| 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 2538 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2810 df-nfc 2884 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3060 df-reu 3341 df-rab 3388 df-v 3429 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-pss 3905 df-nul 4264 df-if 4457 df-pw 4533 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4841 df-int 4880 df-iun 4925 df-br 5075 df-opab 5137 df-mpt 5156 df-tr 5182 df-id 5515 df-eprel 5520 df-po 5528 df-so 5529 df-fr 5573 df-we 5575 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-rn 5631 df-res 5632 df-ima 5633 df-pred 6254 df-ord 6315 df-on 6316 df-lim 6317 df-suc 6318 df-iota 6443 df-fun 6489 df-fn 6490 df-f 6491 df-f1 6492 df-fo 6493 df-f1o 6494 df-fv 6495 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-1st 7931 df-2nd 7932 df-frecs 8220 df-wrecs 8251 df-recs 8300 df-rdg 8338 df-1o 8394 df-oadd 8398 df-er 8632 df-en 8883 df-dom 8884 df-sdom 8885 df-fin 8886 df-dju 9814 df-card 9852 df-pnf 11170 df-mnf 11171 df-xr 11172 df-ltxr 11173 df-le 11174 df-sub 11368 df-neg 11369 df-nn 12164 df-2 12233 df-n0 12427 df-z 12514 df-uz 12778 df-fz 13451 df-hash 14282 |
| This theorem is referenced by: ballotlemiex 34634 ballotlemsup 34637 |
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