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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 14433 | . . . 4 ⊢ (♯‘∅) = 0 | |
| 2 | eluzelre 12901 | . . . . . . 7 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐵 ∈ ℝ) | |
| 3 | 2 | ltp1d 12172 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐵 < (𝐵 + 1)) |
| 4 | eluzelz 12900 | . . . . . . 7 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐵 ∈ ℤ) | |
| 5 | peano2z 12662 | . . . . . . . 8 ⊢ (𝐵 ∈ ℤ → (𝐵 + 1) ∈ ℤ) | |
| 6 | 5 | ancri 559 | . . . . . . 7 ⊢ (𝐵 ∈ ℤ → ((𝐵 + 1) ∈ ℤ ∧ 𝐵 ∈ ℤ)) |
| 7 | fzn 13596 | . . . . . . 7 ⊢ (((𝐵 + 1) ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐵 < (𝐵 + 1) ↔ ((𝐵 + 1)...𝐵) = ∅)) | |
| 8 | 4, 6, 7 | 3syl 19 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 < (𝐵 + 1) ↔ ((𝐵 + 1)...𝐵) = ∅)) |
| 9 | 3, 8 | mpbid 235 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → ((𝐵 + 1)...𝐵) = ∅) |
| 10 | 9 | fveq2d 6886 | . . . 4 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘((𝐵 + 1)...𝐵)) = (♯‘∅)) |
| 11 | 4 | zcnd 12729 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐵 ∈ ℂ) |
| 12 | 11 | subidd 11584 | . . . 4 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 − 𝐵) = 0) |
| 13 | 1, 10, 12 | 3eqtr4a 2823 | . . 3 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘((𝐵 + 1)...𝐵)) = (𝐵 − 𝐵)) |
| 14 | oveq1 7423 | . . . . 5 ⊢ (𝐴 = 𝐵 → (𝐴 + 1) = (𝐵 + 1)) | |
| 15 | 14 | fvoveq1d 7438 | . . . 4 ⊢ (𝐴 = 𝐵 → (♯‘((𝐴 + 1)...𝐵)) = (♯‘((𝐵 + 1)...𝐵))) |
| 16 | oveq2 7424 | . . . 4 ⊢ (𝐴 = 𝐵 → (𝐵 − 𝐴) = (𝐵 − 𝐵)) | |
| 17 | 15, 16 | eqeq12d 2778 | . . 3 ⊢ (𝐴 = 𝐵 → ((♯‘((𝐴 + 1)...𝐵)) = (𝐵 − 𝐴) ↔ (♯‘((𝐵 + 1)...𝐵)) = (𝐵 − 𝐵))) |
| 18 | 13, 17 | imbitrrid 249 | . 2 ⊢ (𝐴 = 𝐵 → (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘((𝐴 + 1)...𝐵)) = (𝐵 − 𝐴))) |
| 19 | uzp1 12927 | . . . . . . 7 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 = 𝐴 ∨ 𝐵 ∈ (ℤ≥‘(𝐴 + 1)))) | |
| 20 | pm2.24 125 | . . . . . . . . 9 ⊢ (𝐴 = 𝐵 → (¬ 𝐴 = 𝐵 → 𝐵 ∈ (ℤ≥‘(𝐴 + 1)))) | |
| 21 | 20 | eqcoms 2770 | . . . . . . . 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 871 | . . . . . . 7 ⊢ ((𝐵 = 𝐴 ∨ 𝐵 ∈ (ℤ≥‘(𝐴 + 1))) → (¬ 𝐴 = 𝐵 → 𝐵 ∈ (ℤ≥‘(𝐴 + 1)))) |
| 24 | 19, 23 | syl 18 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (¬ 𝐴 = 𝐵 → 𝐵 ∈ (ℤ≥‘(𝐴 + 1)))) |
| 25 | 24 | impcom 413 | . . . . 5 ⊢ ((¬ 𝐴 = 𝐵 ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → 𝐵 ∈ (ℤ≥‘(𝐴 + 1))) |
| 26 | hashfz 14494 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘(𝐴 + 1)) → (♯‘((𝐴 + 1)...𝐵)) = ((𝐵 − (𝐴 + 1)) + 1)) | |
| 27 | 25, 26 | syl 18 | . . . 4 ⊢ ((¬ 𝐴 = 𝐵 ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (♯‘((𝐴 + 1)...𝐵)) = ((𝐵 − (𝐴 + 1)) + 1)) |
| 28 | eluzel2 12895 | . . . . . . 7 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐴 ∈ ℤ) | |
| 29 | 28 | zcnd 12729 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐴 ∈ ℂ) |
| 30 | 1cnd 11229 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 1 ∈ ℂ) | |
| 31 | 11, 29, 30 | nppcan2d 11622 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → ((𝐵 − (𝐴 + 1)) + 1) = (𝐵 − 𝐴)) |
| 32 | 31 | adantl 487 | . . . 4 ⊢ ((¬ 𝐴 = 𝐵 ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → ((𝐵 − (𝐴 + 1)) + 1) = (𝐵 − 𝐴)) |
| 33 | 27, 32 | eqtrd 2797 | . . 3 ⊢ ((¬ 𝐴 = 𝐵 ∧ 𝐵 ∈ (ℤ≥‘𝐴)) → (♯‘((𝐴 + 1)...𝐵)) = (𝐵 − 𝐴)) |
| 34 | 33 | ex 418 | . 2 ⊢ (¬ 𝐴 = 𝐵 → (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘((𝐴 + 1)...𝐵)) = (𝐵 − 𝐴))) |
| 35 | 18, 34 | pm2.61i 184 | 1 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘((𝐴 + 1)...𝐵)) = (𝐵 − 𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 ∨ wo 861 = wceq 1570 ∈ wcel 2145 ∅c0 4282 class class class wbr 5107 ‘cfv 6537 (class class class)co 7416 0cc0 11127 1c1 11128 + caddc 11130 < clt 11270 − cmin 11468 ℤcz 12618 ℤ≥cuz 12890 ...cfz 13563 ♯chash 14396 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7739 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-reu 3368 df-rab 3415 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 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-int 4911 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7866 df-1st 7989 df-2nd 7990 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-1o 8458 df-er 8699 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-card 9947 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 df-nn 12261 df-n0 12532 df-z 12619 df-uz 12891 df-fz 13564 df-hash 14397 |
| This theorem is used by: 2lgslem1 27628 sticksstones12a 43010 |
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