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| Mirrors > Home > MPE Home > Th. List > hashunsnggt | Structured version Visualization version GIF version | ||
| Description: The size of a set is greater than a nonnegative integer N if and only if the size of the union of that set with a disjoint singleton is greater than N + 1. (Contributed by BTernaryTau, 10-Sep-2023.) |
| Ref | Expression |
|---|---|
| hashunsnggt | ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑁 ∈ ℕ0) ∧ ¬ 𝐵 ∈ 𝐴) → (𝑁 < (♯‘𝐴) ↔ (𝑁 + 1) < (♯‘(𝐴 ∪ {𝐵})))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nn0re 12628 | . . . . . . . 8 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℝ) | |
| 2 | 1 | rexrd 11372 | . . . . . . 7 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℝ*) |
| 3 | hashxrcl 14514 | . . . . . . 7 ⊢ (𝐴 ∈ 𝑉 → (♯‘𝐴) ∈ ℝ*) | |
| 4 | 1re 11321 | . . . . . . . 8 ⊢ 1 ∈ ℝ | |
| 5 | xltadd1 13399 | . . . . . . . 8 ⊢ ((𝑁 ∈ ℝ* ∧ (♯‘𝐴) ∈ ℝ* ∧ 1 ∈ ℝ) → (𝑁 < (♯‘𝐴) ↔ (𝑁 +e 1) < ((♯‘𝐴) +e 1))) | |
| 6 | 4, 5 | mp3an3 1479 | . . . . . . 7 ⊢ ((𝑁 ∈ ℝ* ∧ (♯‘𝐴) ∈ ℝ*) → (𝑁 < (♯‘𝐴) ↔ (𝑁 +e 1) < ((♯‘𝐴) +e 1))) |
| 7 | 2, 3, 6 | syl2an 608 | . . . . . 6 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐴 ∈ 𝑉) → (𝑁 < (♯‘𝐴) ↔ (𝑁 +e 1) < ((♯‘𝐴) +e 1))) |
| 8 | 7 | ancoms 464 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑁 < (♯‘𝐴) ↔ (𝑁 +e 1) < ((♯‘𝐴) +e 1))) |
| 9 | rexadd 13375 | . . . . . . . . 9 ⊢ ((𝑁 ∈ ℝ ∧ 1 ∈ ℝ) → (𝑁 +e 1) = (𝑁 + 1)) | |
| 10 | 4, 9 | mpan2 704 | . . . . . . . 8 ⊢ (𝑁 ∈ ℝ → (𝑁 +e 1) = (𝑁 + 1)) |
| 11 | 1, 10 | syl 18 | . . . . . . 7 ⊢ (𝑁 ∈ ℕ0 → (𝑁 +e 1) = (𝑁 + 1)) |
| 12 | 11 | adantl 487 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑁 +e 1) = (𝑁 + 1)) |
| 13 | 12 | breq1d 5116 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → ((𝑁 +e 1) < ((♯‘𝐴) +e 1) ↔ (𝑁 + 1) < ((♯‘𝐴) +e 1))) |
| 14 | 8, 13 | bitrd 282 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑁 < (♯‘𝐴) ↔ (𝑁 + 1) < ((♯‘𝐴) +e 1))) |
| 15 | 14 | 3adant2 1149 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑁 ∈ ℕ0) → (𝑁 < (♯‘𝐴) ↔ (𝑁 + 1) < ((♯‘𝐴) +e 1))) |
| 16 | 15 | adantr 486 | . 2 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑁 ∈ ℕ0) ∧ ¬ 𝐵 ∈ 𝐴) → (𝑁 < (♯‘𝐴) ↔ (𝑁 + 1) < ((♯‘𝐴) +e 1))) |
| 17 | hashunsngx 14550 | . . . . . . 7 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (¬ 𝐵 ∈ 𝐴 → (♯‘(𝐴 ∪ {𝐵})) = ((♯‘𝐴) +e 1))) | |
| 18 | 17 | 3impia 1135 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ ¬ 𝐵 ∈ 𝐴) → (♯‘(𝐴 ∪ {𝐵})) = ((♯‘𝐴) +e 1)) |
| 19 | 18 | eqcomd 2769 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ ¬ 𝐵 ∈ 𝐴) → ((♯‘𝐴) +e 1) = (♯‘(𝐴 ∪ {𝐵}))) |
| 20 | 19 | 3expa 1136 | . . . 4 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) ∧ ¬ 𝐵 ∈ 𝐴) → ((♯‘𝐴) +e 1) = (♯‘(𝐴 ∪ {𝐵}))) |
| 21 | 20 | 3adantl3 1187 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑁 ∈ ℕ0) ∧ ¬ 𝐵 ∈ 𝐴) → ((♯‘𝐴) +e 1) = (♯‘(𝐴 ∪ {𝐵}))) |
| 22 | 21 | breq2d 5118 | . 2 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑁 ∈ ℕ0) ∧ ¬ 𝐵 ∈ 𝐴) → ((𝑁 + 1) < ((♯‘𝐴) +e 1) ↔ (𝑁 + 1) < (♯‘(𝐴 ∪ {𝐵})))) |
| 23 | 16, 22 | bitrd 282 | 1 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝑁 ∈ ℕ0) ∧ ¬ 𝐵 ∈ 𝐴) → (𝑁 < (♯‘𝐴) ↔ (𝑁 + 1) < (♯‘(𝐴 ∪ {𝐵})))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 = wceq 1569 ∈ wcel 2146 ∪ cun 4152 {csn 4588 class class class wbr 5106 ‘cfv 6547 (class class class)co 7430 ℝcr 11212 1c1 11214 + caddc 11216 ℝ*cxr 11355 < clt 11356 ℕ0cn0 12619 +e cxad 13252 ♯chash 14487 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7761 ax-cnex 11269 ax-resscn 11270 ax-1cn 11271 ax-icn 11272 ax-addcl 11273 ax-addrcl 11274 ax-mulcl 11275 ax-mulrcl 11276 ax-mulcom 11277 ax-addass 11278 ax-mulass 11279 ax-distr 11280 ax-i2m1 11281 ax-1ne0 11282 ax-1rid 11283 ax-rnegex 11284 ax-rrecex 11285 ax-cnre 11286 ax-pre-lttri 11287 ax-pre-lttrn 11288 ax-pre-ltadd 11289 ax-pre-mulgt0 11290 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6311 df-ord 6372 df-on 6373 df-lim 6374 df-suc 6375 df-iota 6501 df-fun 6549 df-fn 6550 df-f 6551 df-f1 6552 df-fo 6553 df-f1o 6554 df-fv 6555 df-riota 7387 df-ov 7433 df-oprab 7434 df-mpo 7435 df-om 7888 df-1st 8011 df-2nd 8012 df-frecs 8313 df-wrecs 8344 df-recs 8393 df-rdg 8432 df-1o 8490 df-oadd 8494 df-er 8731 df-en 8988 df-dom 8989 df-sdom 8990 df-fin 8991 df-dju 9995 df-card 10033 df-pnf 11358 df-mnf 11359 df-xr 11360 df-ltxr 11361 df-le 11362 df-sub 11556 df-neg 11557 df-nn 12349 df-n0 12620 df-xnn0 12693 df-z 12707 df-uz 12979 df-xneg 13254 df-xadd 13255 df-fz 13653 df-hash 14488 |
| This theorem is used by: hashgt23el 14582 |
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