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Mirrors > Home > MPE Home > Th. List > hashfzp1 | Structured version Visualization version GIF version |
Description: Value of the numeric cardinality of a (possibly empty) integer range. (Contributed by AV, 19-Jun-2021.) |
Ref | Expression |
---|---|
hashfzp1 | ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘((𝐴 + 1)...𝐵)) = (𝐵 − 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | hash0 13716 | . . . 4 ⊢ (♯‘∅) = 0 | |
2 | eluzelre 12242 | . . . . . . 7 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐵 ∈ ℝ) | |
3 | 2 | ltp1d 11558 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐵 < (𝐵 + 1)) |
4 | eluzelz 12241 | . . . . . . 7 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐵 ∈ ℤ) | |
5 | peano2z 12011 | . . . . . . . 8 ⊢ (𝐵 ∈ ℤ → (𝐵 + 1) ∈ ℤ) | |
6 | 5 | ancri 550 | . . . . . . 7 ⊢ (𝐵 ∈ ℤ → ((𝐵 + 1) ∈ ℤ ∧ 𝐵 ∈ ℤ)) |
7 | fzn 12911 | . . . . . . 7 ⊢ (((𝐵 + 1) ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐵 < (𝐵 + 1) ↔ ((𝐵 + 1)...𝐵) = ∅)) | |
8 | 4, 6, 7 | 3syl 18 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 < (𝐵 + 1) ↔ ((𝐵 + 1)...𝐵) = ∅)) |
9 | 3, 8 | mpbid 233 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → ((𝐵 + 1)...𝐵) = ∅) |
10 | 9 | fveq2d 6667 | . . . 4 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘((𝐵 + 1)...𝐵)) = (♯‘∅)) |
11 | 4 | zcnd 12076 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐵 ∈ ℂ) |
12 | 11 | subidd 10973 | . . . 4 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 − 𝐵) = 0) |
13 | 1, 10, 12 | 3eqtr4a 2879 | . . 3 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘((𝐵 + 1)...𝐵)) = (𝐵 − 𝐵)) |
14 | oveq1 7152 | . . . . 5 ⊢ (𝐴 = 𝐵 → (𝐴 + 1) = (𝐵 + 1)) | |
15 | 14 | fvoveq1d 7167 | . . . 4 ⊢ (𝐴 = 𝐵 → (♯‘((𝐴 + 1)...𝐵)) = (♯‘((𝐵 + 1)...𝐵))) |
16 | oveq2 7153 | . . . 4 ⊢ (𝐴 = 𝐵 → (𝐵 − 𝐴) = (𝐵 − 𝐵)) | |
17 | 15, 16 | eqeq12d 2834 | . . 3 ⊢ (𝐴 = 𝐵 → ((♯‘((𝐴 + 1)...𝐵)) = (𝐵 − 𝐴) ↔ (♯‘((𝐵 + 1)...𝐵)) = (𝐵 − 𝐵))) |
18 | 13, 17 | syl5ibr 247 | . 2 ⊢ (𝐴 = 𝐵 → (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘((𝐴 + 1)...𝐵)) = (𝐵 − 𝐴))) |
19 | uzp1 12267 | . . . . . . 7 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 = 𝐴 ∨ 𝐵 ∈ (ℤ≥‘(𝐴 + 1)))) | |
20 | pm2.24 124 | . . . . . . . . 9 ⊢ (𝐴 = 𝐵 → (¬ 𝐴 = 𝐵 → 𝐵 ∈ (ℤ≥‘(𝐴 + 1)))) | |
21 | 20 | eqcoms 2826 | . . . . . . . 8 ⊢ (𝐵 = 𝐴 → (¬ 𝐴 = 𝐵 → 𝐵 ∈ (ℤ≥‘(𝐴 + 1)))) |
22 | ax-1 6 | . . . . . . . 8 ⊢ (𝐵 ∈ (ℤ≥‘(𝐴 + 1)) → (¬ 𝐴 = 𝐵 → 𝐵 ∈ (ℤ≥‘(𝐴 + 1)))) | |
23 | 21, 22 | jaoi 851 | . . . . . . 7 ⊢ ((𝐵 = 𝐴 ∨ 𝐵 ∈ (ℤ≥‘(𝐴 + 1))) → (¬ 𝐴 = 𝐵 → 𝐵 ∈ (ℤ≥‘(𝐴 + 1)))) |
24 | 19, 23 | syl 17 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (¬ 𝐴 = 𝐵 → 𝐵 ∈ (ℤ≥‘(𝐴 + 1)))) |
25 | 24 | impcom 408 | . . . . 5 ⊢ ((¬ 𝐴 = 𝐵 ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → 𝐵 ∈ (ℤ≥‘(𝐴 + 1))) |
26 | hashfz 13776 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘(𝐴 + 1)) → (♯‘((𝐴 + 1)...𝐵)) = ((𝐵 − (𝐴 + 1)) + 1)) | |
27 | 25, 26 | syl 17 | . . . 4 ⊢ ((¬ 𝐴 = 𝐵 ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (♯‘((𝐴 + 1)...𝐵)) = ((𝐵 − (𝐴 + 1)) + 1)) |
28 | eluzel2 12236 | . . . . . . 7 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐴 ∈ ℤ) | |
29 | 28 | zcnd 12076 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐴 ∈ ℂ) |
30 | 1cnd 10624 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 1 ∈ ℂ) | |
31 | 11, 29, 30 | nppcan2d 11011 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → ((𝐵 − (𝐴 + 1)) + 1) = (𝐵 − 𝐴)) |
32 | 31 | adantl 482 | . . . 4 ⊢ ((¬ 𝐴 = 𝐵 ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → ((𝐵 − (𝐴 + 1)) + 1) = (𝐵 − 𝐴)) |
33 | 27, 32 | eqtrd 2853 | . . 3 ⊢ ((¬ 𝐴 = 𝐵 ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (♯‘((𝐴 + 1)...𝐵)) = (𝐵 − 𝐴)) |
34 | 33 | ex 413 | . 2 ⊢ (¬ 𝐴 = 𝐵 → (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘((𝐴 + 1)...𝐵)) = (𝐵 − 𝐴))) |
35 | 18, 34 | pm2.61i 183 | 1 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘((𝐴 + 1)...𝐵)) = (𝐵 − 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 207 ∧ wa 396 ∨ wo 841 = wceq 1528 ∈ wcel 2105 ∅c0 4288 class class class wbr 5057 ‘cfv 6348 (class class class)co 7145 0cc0 10525 1c1 10526 + caddc 10528 < clt 10663 − cmin 10858 ℤcz 11969 ℤ≥cuz 12231 ...cfz 12880 ♯chash 13678 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2790 ax-sep 5194 ax-nul 5201 ax-pow 5257 ax-pr 5320 ax-un 7450 ax-cnex 10581 ax-resscn 10582 ax-1cn 10583 ax-icn 10584 ax-addcl 10585 ax-addrcl 10586 ax-mulcl 10587 ax-mulrcl 10588 ax-mulcom 10589 ax-addass 10590 ax-mulass 10591 ax-distr 10592 ax-i2m1 10593 ax-1ne0 10594 ax-1rid 10595 ax-rnegex 10596 ax-rrecex 10597 ax-cnre 10598 ax-pre-lttri 10599 ax-pre-lttrn 10600 ax-pre-ltadd 10601 ax-pre-mulgt0 10602 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3or 1080 df-3an 1081 df-tru 1531 df-ex 1772 df-nf 1776 df-sb 2061 df-mo 2615 df-eu 2647 df-clab 2797 df-cleq 2811 df-clel 2890 df-nfc 2960 df-ne 3014 df-nel 3121 df-ral 3140 df-rex 3141 df-reu 3142 df-rab 3144 df-v 3494 df-sbc 3770 df-csb 3881 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-pss 3951 df-nul 4289 df-if 4464 df-pw 4537 df-sn 4558 df-pr 4560 df-tp 4562 df-op 4564 df-uni 4831 df-int 4868 df-iun 4912 df-br 5058 df-opab 5120 df-mpt 5138 df-tr 5164 df-id 5453 df-eprel 5458 df-po 5467 df-so 5468 df-fr 5507 df-we 5509 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-res 5560 df-ima 5561 df-pred 6141 df-ord 6187 df-on 6188 df-lim 6189 df-suc 6190 df-iota 6307 df-fun 6350 df-fn 6351 df-f 6352 df-f1 6353 df-fo 6354 df-f1o 6355 df-fv 6356 df-riota 7103 df-ov 7148 df-oprab 7149 df-mpo 7150 df-om 7570 df-1st 7678 df-2nd 7679 df-wrecs 7936 df-recs 7997 df-rdg 8035 df-1o 8091 df-er 8278 df-en 8498 df-dom 8499 df-sdom 8500 df-fin 8501 df-card 9356 df-pnf 10665 df-mnf 10666 df-xr 10667 df-ltxr 10668 df-le 10669 df-sub 10860 df-neg 10861 df-nn 11627 df-n0 11886 df-z 11970 df-uz 12232 df-fz 12881 df-hash 13679 |
This theorem is referenced by: 2lgslem1 25897 |
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