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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fiphp3d | Structured version Visualization version GIF version | ||
| Description: Infinite pigeonhole principle for partitioning an infinite set between finitely many buckets. (Contributed by Stefan O'Rear, 18-Oct-2014.) |
| Ref | Expression |
|---|---|
| fiphp3d.a | ⊢ (𝜑 → 𝐴 ≈ ℕ) |
| fiphp3d.b | ⊢ (𝜑 → 𝐵 ∈ Fin) |
| fiphp3d.c | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐷 ∈ 𝐵) |
| Ref | Expression |
|---|---|
| fiphp3d | ⊢ (𝜑 → ∃𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ≈ ℕ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ominf 9223 | . . . . 5 ⊢ ¬ ω ∈ Fin | |
| 2 | iunrab 5016 | . . . . . . . 8 ⊢ ∪ 𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} = {𝑥 ∈ 𝐴 ∣ ∃𝑦 ∈ 𝐵 𝐷 = 𝑦} | |
| 3 | fiphp3d.c | . . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐷 ∈ 𝐵) | |
| 4 | risset 3238 | . . . . . . . . . . . 12 ⊢ (𝐷 ∈ 𝐵 ↔ ∃𝑦 ∈ 𝐵 𝑦 = 𝐷) | |
| 5 | eqcom 2768 | . . . . . . . . . . . . 13 ⊢ (𝑦 = 𝐷 ↔ 𝐷 = 𝑦) | |
| 6 | 5 | rexbii 3110 | . . . . . . . . . . . 12 ⊢ (∃𝑦 ∈ 𝐵 𝑦 = 𝐷 ↔ ∃𝑦 ∈ 𝐵 𝐷 = 𝑦) |
| 7 | 4, 6 | bitri 278 | . . . . . . . . . . 11 ⊢ (𝐷 ∈ 𝐵 ↔ ∃𝑦 ∈ 𝐵 𝐷 = 𝑦) |
| 8 | 3, 7 | sylib 221 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∃𝑦 ∈ 𝐵 𝐷 = 𝑦) |
| 9 | 8 | ralrimiva 3155 | . . . . . . . . 9 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝐷 = 𝑦) |
| 10 | rabid2 3447 | . . . . . . . . 9 ⊢ (𝐴 = {𝑥 ∈ 𝐴 ∣ ∃𝑦 ∈ 𝐵 𝐷 = 𝑦} ↔ ∀𝑥 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝐷 = 𝑦) | |
| 11 | 9, 10 | sylibr 237 | . . . . . . . 8 ⊢ (𝜑 → 𝐴 = {𝑥 ∈ 𝐴 ∣ ∃𝑦 ∈ 𝐵 𝐷 = 𝑦}) |
| 12 | 2, 11 | eqtr4id 2815 | . . . . . . 7 ⊢ (𝜑 → ∪ 𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} = 𝐴) |
| 13 | 12 | eleq1d 2846 | . . . . . 6 ⊢ (𝜑 → (∪ 𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin ↔ 𝐴 ∈ Fin)) |
| 14 | fiphp3d.a | . . . . . . . 8 ⊢ (𝜑 → 𝐴 ≈ ℕ) | |
| 15 | nnenom 14015 | . . . . . . . 8 ⊢ ℕ ≈ ω | |
| 16 | entr 9002 | . . . . . . . 8 ⊢ ((𝐴 ≈ ℕ ∧ ℕ ≈ ω) → 𝐴 ≈ ω) | |
| 17 | 14, 15, 16 | sylancl 597 | . . . . . . 7 ⊢ (𝜑 → 𝐴 ≈ ω) |
| 18 | enfi 9170 | . . . . . . 7 ⊢ (𝐴 ≈ ω → (𝐴 ∈ Fin ↔ ω ∈ Fin)) | |
| 19 | 17, 18 | syl 18 | . . . . . 6 ⊢ (𝜑 → (𝐴 ∈ Fin ↔ ω ∈ Fin)) |
| 20 | 13, 19 | bitrd 282 | . . . . 5 ⊢ (𝜑 → (∪ 𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin ↔ ω ∈ Fin)) |
| 21 | 1, 20 | mtbiri 330 | . . . 4 ⊢ (𝜑 → ¬ ∪ 𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) |
| 22 | fiphp3d.b | . . . . 5 ⊢ (𝜑 → 𝐵 ∈ Fin) | |
| 23 | iunfi 9299 | . . . . 5 ⊢ ((𝐵 ∈ Fin ∧ ∀𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) → ∪ 𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) | |
| 24 | 22, 23 | sylan 591 | . . . 4 ⊢ ((𝜑 ∧ ∀𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) → ∪ 𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) |
| 25 | 21, 24 | mtand 827 | . . 3 ⊢ (𝜑 → ¬ ∀𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) |
| 26 | rexnal 3115 | . . 3 ⊢ (∃𝑦 ∈ 𝐵 ¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin ↔ ¬ ∀𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) | |
| 27 | 25, 26 | sylibr 237 | . 2 ⊢ (𝜑 → ∃𝑦 ∈ 𝐵 ¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) |
| 28 | 17, 15 | jctir 529 | . . . . 5 ⊢ (𝜑 → (𝐴 ≈ ω ∧ ℕ ≈ ω)) |
| 29 | ssrab2 4033 | . . . . . 6 ⊢ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ⊆ 𝐴 | |
| 30 | 29 | jctl 532 | . . . . 5 ⊢ (¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin → ({𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ⊆ 𝐴 ∧ ¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin)) |
| 31 | ctbnfien 43493 | . . . . 5 ⊢ (((𝐴 ≈ ω ∧ ℕ ≈ ω) ∧ ({𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ⊆ 𝐴 ∧ ¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin)) → {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ≈ ℕ) | |
| 32 | 28, 30, 31 | syl2an 607 | . . . 4 ⊢ ((𝜑 ∧ ¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) → {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ≈ ℕ) |
| 33 | 32 | ex 417 | . . 3 ⊢ (𝜑 → (¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin → {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ≈ ℕ)) |
| 34 | 33 | reximdv 3178 | . 2 ⊢ (𝜑 → (∃𝑦 ∈ 𝐵 ¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin → ∃𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ≈ ℕ)) |
| 35 | 27, 34 | mpd 16 | 1 ⊢ (𝜑 → ∃𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ≈ ℕ) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1568 ∈ wcel 2141 ∀wral 3077 ∃wrex 3087 {crab 3414 ⊆ wss 3904 ∪ ciun 4955 class class class wbr 5108 ωcom 7861 ≈ cen 8939 Fincfn 8942 ℕcn 12232 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5256 ax-nul 5268 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-inf2 9609 ax-cnex 11155 ax-resscn 11156 ax-1cn 11157 ax-icn 11158 ax-addcl 11159 ax-addrcl 11160 ax-mulcl 11161 ax-mulrcl 11162 ax-mulcom 11163 ax-addass 11164 ax-mulass 11165 ax-distr 11166 ax-i2m1 11167 ax-1ne0 11168 ax-1rid 11169 ax-rnegex 11170 ax-rrecex 11171 ax-cnre 11172 ax-pre-lttri 11173 ax-pre-lttrn 11174 ax-pre-ltadd 11175 ax-pre-mulgt0 11176 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-nf 1812 df-sb 2095 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-int 4912 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7862 df-2nd 7986 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-1o 8452 df-er 8693 df-en 8943 df-dom 8944 df-sdom 8945 df-fin 8946 df-pnf 11244 df-mnf 11245 df-xr 11246 df-ltxr 11247 df-le 11248 df-sub 11442 df-neg 11443 df-nn 12233 df-n0 12504 df-z 12591 df-uz 12862 |
| This theorem is referenced by: pellexlem5 43508 |
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