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| Mirrors > Home > ILE Home > Th. List > ballotfilemdifcfi | GIF version | ||
| Description: Lemma for ballotfi . The portion of a counting representing votes for B up to a specified integer is finite. (Contributed by Jim Kingdon, 8-Jun-2026.) |
| Ref | Expression |
|---|---|
| ballotth.m | ⊢ 𝑀 ∈ ℕ |
| ballotth.n | ⊢ 𝑁 ∈ ℕ |
| ballotfilem.o | ⊢ 𝑂 = {𝑐 ∈ (𝒫 (1...(𝑀 + 𝑁)) ∩ Fin) ∣ (♯‘𝑐) = 𝑀} |
| ballotfilemc.c | ⊢ (𝜑 → 𝐶 ∈ 𝑂) |
| ballotfilemc.j | ⊢ (𝜑 → 𝐽 ∈ ℤ) |
| Ref | Expression |
|---|---|
| ballotfilemdifcfi | ⊢ (𝜑 → ((1...𝐽) ∖ 𝐶) ∈ Fin) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1zzd 9671 | . . 3 ⊢ (𝜑 → 1 ∈ ℤ) | |
| 2 | ballotfilemc.j | . . 3 ⊢ (𝜑 → 𝐽 ∈ ℤ) | |
| 3 | 1, 2 | fzfigd 10868 | . 2 ⊢ (𝜑 → (1...𝐽) ∈ Fin) |
| 4 | difssd 3356 | . 2 ⊢ (𝜑 → ((1...𝐽) ∖ 𝐶) ⊆ (1...𝐽)) | |
| 5 | elfzelz 10428 | . . . . . . 7 ⊢ (𝑥 ∈ (1...𝐽) → 𝑥 ∈ ℤ) | |
| 6 | 5 | adantl 277 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (1...𝐽)) → 𝑥 ∈ ℤ) |
| 7 | 1zzd 9671 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (1...𝐽)) → 1 ∈ ℤ) | |
| 8 | 2 | adantr 276 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (1...𝐽)) → 𝐽 ∈ ℤ) |
| 9 | fzdcel 10444 | . . . . . 6 ⊢ ((𝑥 ∈ ℤ ∧ 1 ∈ ℤ ∧ 𝐽 ∈ ℤ) → DECID 𝑥 ∈ (1...𝐽)) | |
| 10 | 6, 7, 8, 9 | syl3anc 1278 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (1...𝐽)) → DECID 𝑥 ∈ (1...𝐽)) |
| 11 | ballotth.m | . . . . . . 7 ⊢ 𝑀 ∈ ℕ | |
| 12 | ballotth.n | . . . . . . 7 ⊢ 𝑁 ∈ ℕ | |
| 13 | ballotfilem.o | . . . . . . 7 ⊢ 𝑂 = {𝑐 ∈ (𝒫 (1...(𝑀 + 𝑁)) ∩ Fin) ∣ (♯‘𝑐) = 𝑀} | |
| 14 | ballotfilemc.c | . . . . . . . 8 ⊢ (𝜑 → 𝐶 ∈ 𝑂) | |
| 15 | 14 | adantr 276 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (1...𝐽)) → 𝐶 ∈ 𝑂) |
| 16 | 11, 12, 13, 15, 6 | ballotfilemcdc 13223 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (1...𝐽)) → DECID 𝑥 ∈ 𝐶) |
| 17 | dcn 854 | . . . . . 6 ⊢ (DECID 𝑥 ∈ 𝐶 → DECID ¬ 𝑥 ∈ 𝐶) | |
| 18 | 16, 17 | syl 14 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (1...𝐽)) → DECID ¬ 𝑥 ∈ 𝐶) |
| 19 | 10, 18 | dcand 945 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (1...𝐽)) → DECID (𝑥 ∈ (1...𝐽) ∧ ¬ 𝑥 ∈ 𝐶)) |
| 20 | eldif 3229 | . . . . 5 ⊢ (𝑥 ∈ ((1...𝐽) ∖ 𝐶) ↔ (𝑥 ∈ (1...𝐽) ∧ ¬ 𝑥 ∈ 𝐶)) | |
| 21 | 20 | dcbii 852 | . . . 4 ⊢ (DECID 𝑥 ∈ ((1...𝐽) ∖ 𝐶) ↔ DECID (𝑥 ∈ (1...𝐽) ∧ ¬ 𝑥 ∈ 𝐶)) |
| 22 | 19, 21 | sylibr 134 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (1...𝐽)) → DECID 𝑥 ∈ ((1...𝐽) ∖ 𝐶)) |
| 23 | 22 | ralrimiva 2623 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ (1...𝐽)DECID 𝑥 ∈ ((1...𝐽) ∖ 𝐶)) |
| 24 | ssfidc 7245 | . 2 ⊢ (((1...𝐽) ∈ Fin ∧ ((1...𝐽) ∖ 𝐶) ⊆ (1...𝐽) ∧ ∀𝑥 ∈ (1...𝐽)DECID 𝑥 ∈ ((1...𝐽) ∖ 𝐶)) → ((1...𝐽) ∖ 𝐶) ∈ Fin) | |
| 25 | 3, 4, 23, 24 | syl3anc 1278 | 1 ⊢ (𝜑 → ((1...𝐽) ∖ 𝐶) ∈ Fin) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 104 DECID wdc 846 = wceq 1402 ∈ wcel 2209 ∀wral 2528 {crab 2532 ∖ cdif 3217 ∩ cin 3219 ⊆ wss 3220 𝒫 cpw 3688 ‘cfv 5377 (class class class)co 6085 Fincfn 7022 1c1 8180 + caddc 8182 ℕcn 9304 ℤcz 9644 ...cfz 10411 ♯chash 11214 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4246 ax-sep 4249 ax-nul 4259 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-setind 4684 ax-iinf 4735 ax-cnex 8270 ax-resscn 8271 ax-1cn 8272 ax-1re 8273 ax-icn 8274 ax-addcl 8275 ax-addrcl 8276 ax-mulcl 8277 ax-addcom 8279 ax-addass 8281 ax-distr 8283 ax-i2m1 8284 ax-0lt1 8285 ax-0id 8287 ax-rnegex 8288 ax-cnre 8290 ax-pre-ltirr 8291 ax-pre-ltwlin 8292 ax-pre-lttrn 8293 ax-pre-apti 8294 ax-pre-ltadd 8295 |
| This proof depends on definitions: df-bi 117 df-dc 847 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-if 3639 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-iun 4014 df-br 4131 df-opab 4193 df-mpt 4194 df-tr 4230 df-id 4438 df-iord 4511 df-on 4513 df-ilim 4514 df-suc 4516 df-iom 4738 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-res 4786 df-ima 4787 df-iota 5337 df-fun 5379 df-fn 5380 df-f 5381 df-f1 5382 df-fo 5383 df-f1o 5384 df-fv 5385 df-riota 6038 df-ov 6088 df-oprab 6089 df-mpo 6090 df-1st 6374 df-2nd 6375 df-recs 6576 df-frec 6662 df-1o 6687 df-er 6807 df-en 7023 df-fin 7025 df-pnf 8362 df-mnf 8363 df-xr 8364 df-ltxr 8365 df-le 8366 df-sub 8499 df-neg 8500 df-inn 9305 df-n0 9564 df-z 9645 df-uz 9922 df-fz 10412 |
| This theorem is used by: ballotfilemfval 13229 ballotfilemfelz 13230 ballotfilemfp1 13231 ballotfilemfrc 13270 |
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