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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 12573 | . . 3 ⊢ (𝐶 ∈ 𝑂 → 0 ∈ ℤ) | |
| 8 | 1, 2, 3, 4, 5, 6, 7 | ballotlemfval 34747 | . 2 ⊢ (𝐶 ∈ 𝑂 → ((𝐹‘𝐶)‘0) = ((♯‘((1...0) ∩ 𝐶)) − (♯‘((1...0) ∖ 𝐶)))) |
| 9 | fz10 13543 | . . . . . . . 8 ⊢ (1...0) = ∅ | |
| 10 | 9 | ineq1i 4166 | . . . . . . 7 ⊢ ((1...0) ∩ 𝐶) = (∅ ∩ 𝐶) |
| 11 | incom 4159 | . . . . . . 7 ⊢ (𝐶 ∩ ∅) = (∅ ∩ 𝐶) | |
| 12 | in0 4346 | . . . . . . 7 ⊢ (𝐶 ∩ ∅) = ∅ | |
| 13 | 10, 11, 12 | 3eqtr2i 2790 | . . . . . 6 ⊢ ((1...0) ∩ 𝐶) = ∅ |
| 14 | 13 | fveq2i 6864 | . . . . 5 ⊢ (♯‘((1...0) ∩ 𝐶)) = (♯‘∅) |
| 15 | hash0 14373 | . . . . 5 ⊢ (♯‘∅) = 0 | |
| 16 | 14, 15 | eqtri 2784 | . . . 4 ⊢ (♯‘((1...0) ∩ 𝐶)) = 0 |
| 17 | 9 | difeq1i 4074 | . . . . . . 7 ⊢ ((1...0) ∖ 𝐶) = (∅ ∖ 𝐶) |
| 18 | 0dif 4356 | . . . . . . 7 ⊢ (∅ ∖ 𝐶) = ∅ | |
| 19 | 17, 18 | eqtri 2784 | . . . . . 6 ⊢ ((1...0) ∖ 𝐶) = ∅ |
| 20 | 19 | fveq2i 6864 | . . . . 5 ⊢ (♯‘((1...0) ∖ 𝐶)) = (♯‘∅) |
| 21 | 20, 15 | eqtri 2784 | . . . 4 ⊢ (♯‘((1...0) ∖ 𝐶)) = 0 |
| 22 | 16, 21 | oveq12i 7402 | . . 3 ⊢ ((♯‘((1...0) ∩ 𝐶)) − (♯‘((1...0) ∖ 𝐶))) = (0 − 0) |
| 23 | 0m0e0 12329 | . . 3 ⊢ (0 − 0) = 0 | |
| 24 | 22, 23 | eqtri 2784 | . 2 ⊢ ((♯‘((1...0) ∩ 𝐶)) − (♯‘((1...0) ∖ 𝐶))) = 0 |
| 25 | 8, 24 | eqtrdi 2812 | 1 ⊢ (𝐶 ∈ 𝑂 → ((𝐹‘𝐶)‘0) = 0) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1559 ∈ wcel 2141 {crab 3413 ∖ cdif 3899 ∩ cin 3901 ∅c0 4283 𝒫 cpw 4552 ↦ cmpt 5178 ‘cfv 6515 (class class class)co 7390 0cc0 11066 1c1 11067 + caddc 11069 − cmin 11407 / cdiv 11837 ℕcn 12203 ℤcz 12561 ...cfz 13505 ♯chash 14336 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5224 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7712 ax-cnex 11122 ax-resscn 11123 ax-1cn 11124 ax-icn 11125 ax-addcl 11126 ax-addrcl 11127 ax-mulcl 11128 ax-mulrcl 11129 ax-mulcom 11130 ax-addass 11131 ax-mulass 11132 ax-distr 11133 ax-i2m1 11134 ax-1ne0 11135 ax-1rid 11136 ax-rnegex 11137 ax-rrecex 11138 ax-cnre 11139 ax-pre-lttri 11140 ax-pre-lttrn 11141 ax-pre-ltadd 11142 ax-pre-mulgt0 11143 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-int 4903 df-iun 4948 df-br 5098 df-opab 5160 df-mpt 5179 df-tr 5205 df-id 5538 df-eprel 5543 df-po 5551 df-so 5552 df-fr 5596 df-we 5598 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-pred 6282 df-ord 6343 df-on 6344 df-lim 6345 df-suc 6346 df-iota 6471 df-fun 6517 df-fn 6518 df-f 6519 df-f1 6520 df-fo 6521 df-f1o 6522 df-fv 6523 df-riota 7347 df-ov 7393 df-oprab 7394 df-mpo 7395 df-om 7841 df-1st 7964 df-2nd 7965 df-frecs 8255 df-wrecs 8286 df-recs 8335 df-rdg 8374 df-1o 8430 df-er 8671 df-en 8921 df-dom 8922 df-sdom 8923 df-fin 8924 df-card 9890 df-pnf 11211 df-mnf 11212 df-xr 11213 df-ltxr 11214 df-le 11215 df-sub 11409 df-neg 11410 df-nn 12204 df-n0 12475 df-z 12562 df-uz 12833 df-fz 13506 df-hash 14337 |
| This theorem is referenced by: ballotlem4 34756 ballotlemi1 34760 ballotlemii 34761 ballotlemic 34764 ballotlem1c 34765 |
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