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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 9654 | . . 3 ⊢ (𝜑 → 1 ∈ ℤ) | |
| 2 | ballotfilemc.j | . . 3 ⊢ (𝜑 → 𝐽 ∈ ℤ) | |
| 3 | 1, 2 | fzfigd 10851 | . 2 ⊢ (𝜑 → (1...𝐽) ∈ Fin) |
| 4 | difssd 3356 | . 2 ⊢ (𝜑 → ((1...𝐽) ∖ 𝐶) ⊆ (1...𝐽)) | |
| 5 | elfzelz 10411 | . . . . . . 7 ⊢ (𝑥 ∈ (1...𝐽) → 𝑥 ∈ ℤ) | |
| 6 | 5 | adantl 277 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (1...𝐽)) → 𝑥 ∈ ℤ) |
| 7 | 1zzd 9654 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (1...𝐽)) → 1 ∈ ℤ) | |
| 8 | 2 | adantr 276 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (1...𝐽)) → 𝐽 ∈ ℤ) |
| 9 | fzdcel 10427 | . . . . . 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 13206 | . . . . . 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 7239 | . 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 5375 (class class class)co 6079 Fincfn 7016 1c1 8174 + caddc 8176 ℕcn 9287 ℤcz 9627 ...cfz 10394 ♯chash 11197 |
| 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 4244 ax-sep 4247 ax-nul 4257 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 ax-iinf 4733 ax-cnex 8264 ax-resscn 8265 ax-1cn 8266 ax-1re 8267 ax-icn 8268 ax-addcl 8269 ax-addrcl 8270 ax-mulcl 8271 ax-addcom 8273 ax-addass 8275 ax-distr 8277 ax-i2m1 8278 ax-0lt1 8279 ax-0id 8281 ax-rnegex 8282 ax-cnre 8284 ax-pre-ltirr 8285 ax-pre-ltwlin 8286 ax-pre-lttrn 8287 ax-pre-apti 8288 ax-pre-ltadd 8289 |
| 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 3714 df-pr 3715 df-op 3717 df-uni 3934 df-int 3969 df-iun 4012 df-br 4129 df-opab 4191 df-mpt 4192 df-tr 4228 df-id 4436 df-iord 4509 df-on 4511 df-ilim 4512 df-suc 4514 df-iom 4736 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-rn 4783 df-res 4784 df-ima 4785 df-iota 5335 df-fun 5377 df-fn 5378 df-f 5379 df-f1 5380 df-fo 5381 df-f1o 5382 df-fv 5383 df-riota 6032 df-ov 6082 df-oprab 6083 df-mpo 6084 df-1st 6368 df-2nd 6369 df-recs 6570 df-frec 6656 df-1o 6681 df-er 6801 df-en 7017 df-fin 7019 df-pnf 8356 df-mnf 8357 df-xr 8358 df-ltxr 8359 df-le 8360 df-sub 8493 df-neg 8494 df-inn 9288 df-n0 9547 df-z 9628 df-uz 9905 df-fz 10395 |
| This theorem is used by: ballotfilemfval 13212 ballotfilemfelz 13213 ballotfilemfp1 13214 ballotfilemfrc 13253 |
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