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| Mirrors > Home > MPE Home > Th. List > ramtub | Structured version Visualization version GIF version | ||
| Description: The Ramsey number is a lower bound on the set of all numbers with the Ramsey number property. (Contributed by Mario Carneiro, 20-Apr-2015.) (Revised by AV, 14-Sep-2020.) |
| Ref | Expression |
|---|---|
| ramval.c | ⊢ 𝐶 = (𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (♯‘𝑏) = 𝑖}) |
| ramval.t | ⊢ 𝑇 = {𝑛 ∈ ℕ0 ∣ ∀𝑠(𝑛 ≤ (♯‘𝑠) → ∀𝑓 ∈ (𝑅 ↑m (𝑠𝐶𝑀))∃𝑐 ∈ 𝑅 ∃𝑥 ∈ 𝒫 𝑠((𝐹‘𝑐) ≤ (♯‘𝑥) ∧ (𝑥𝐶𝑀) ⊆ (◡𝑓 “ {𝑐})))} |
| Ref | Expression |
|---|---|
| ramtub | ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑅 ∈ 𝑉 ∧ 𝐹:𝑅⟶ℕ0) ∧ 𝐴 ∈ 𝑇) → (𝑀 Ramsey 𝐹) ≤ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ramval.c | . . . 4 ⊢ 𝐶 = (𝑎 ∈ V, 𝑖 ∈ ℕ0 ↦ {𝑏 ∈ 𝒫 𝑎 ∣ (♯‘𝑏) = 𝑖}) | |
| 2 | ramval.t | . . . 4 ⊢ 𝑇 = {𝑛 ∈ ℕ0 ∣ ∀𝑠(𝑛 ≤ (♯‘𝑠) → ∀𝑓 ∈ (𝑅 ↑m (𝑠𝐶𝑀))∃𝑐 ∈ 𝑅 ∃𝑥 ∈ 𝒫 𝑠((𝐹‘𝑐) ≤ (♯‘𝑥) ∧ (𝑥𝐶𝑀) ⊆ (◡𝑓 “ {𝑐})))} | |
| 3 | 1, 2 | ramcl2lem 16958 | . . 3 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑅 ∈ 𝑉 ∧ 𝐹:𝑅⟶ℕ0) → (𝑀 Ramsey 𝐹) = if(𝑇 = ∅, +∞, inf(𝑇, ℝ, < ))) |
| 4 | n0i 4299 | . . . 4 ⊢ (𝐴 ∈ 𝑇 → ¬ 𝑇 = ∅) | |
| 5 | 4 | iffalsed 4495 | . . 3 ⊢ (𝐴 ∈ 𝑇 → if(𝑇 = ∅, +∞, inf(𝑇, ℝ, < )) = inf(𝑇, ℝ, < )) |
| 6 | 3, 5 | sylan9eq 2784 | . 2 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑅 ∈ 𝑉 ∧ 𝐹:𝑅⟶ℕ0) ∧ 𝐴 ∈ 𝑇) → (𝑀 Ramsey 𝐹) = inf(𝑇, ℝ, < )) |
| 7 | 2 | ssrab3 4041 | . . . . 5 ⊢ 𝑇 ⊆ ℕ0 |
| 8 | nn0uz 12814 | . . . . 5 ⊢ ℕ0 = (ℤ≥‘0) | |
| 9 | 7, 8 | sseqtri 3992 | . . . 4 ⊢ 𝑇 ⊆ (ℤ≥‘0) |
| 10 | 9 | a1i 11 | . . 3 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑅 ∈ 𝑉 ∧ 𝐹:𝑅⟶ℕ0) → 𝑇 ⊆ (ℤ≥‘0)) |
| 11 | infssuzle 12869 | . . 3 ⊢ ((𝑇 ⊆ (ℤ≥‘0) ∧ 𝐴 ∈ 𝑇) → inf(𝑇, ℝ, < ) ≤ 𝐴) | |
| 12 | 10, 11 | sylan 580 | . 2 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑅 ∈ 𝑉 ∧ 𝐹:𝑅⟶ℕ0) ∧ 𝐴 ∈ 𝑇) → inf(𝑇, ℝ, < ) ≤ 𝐴) |
| 13 | 6, 12 | eqbrtrd 5124 | 1 ⊢ (((𝑀 ∈ ℕ0 ∧ 𝑅 ∈ 𝑉 ∧ 𝐹:𝑅⟶ℕ0) ∧ 𝐴 ∈ 𝑇) → (𝑀 Ramsey 𝐹) ≤ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1086 ∀wal 1538 = wceq 1540 ∈ wcel 2109 ∀wral 3044 ∃wrex 3053 {crab 3402 Vcvv 3444 ⊆ wss 3911 ∅c0 4292 ifcif 4484 𝒫 cpw 4559 {csn 4585 class class class wbr 5102 ◡ccnv 5630 “ cima 5634 ⟶wf 6496 ‘cfv 6500 (class class class)co 7370 ∈ cmpo 7372 ↑m cmap 8777 infcinf 9369 ℝcr 11046 0cc0 11047 +∞cpnf 11184 < clt 11187 ≤ cle 11188 ℕ0cn0 12421 ℤ≥cuz 12772 ♯chash 14274 Ramsey cram 16948 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5229 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7692 ax-cnex 11103 ax-resscn 11104 ax-1cn 11105 ax-icn 11106 ax-addcl 11107 ax-addrcl 11108 ax-mulcl 11109 ax-mulrcl 11110 ax-mulcom 11111 ax-addass 11112 ax-mulass 11113 ax-distr 11114 ax-i2m1 11115 ax-1ne0 11116 ax-1rid 11117 ax-rnegex 11118 ax-rrecex 11119 ax-cnre 11120 ax-pre-lttri 11121 ax-pre-lttrn 11122 ax-pre-ltadd 11123 ax-pre-mulgt0 11124 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3351 df-reu 3352 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-pss 3931 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6263 df-ord 6324 df-on 6325 df-lim 6326 df-suc 6327 df-iota 6453 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-riota 7327 df-ov 7373 df-oprab 7374 df-mpo 7375 df-om 7824 df-1st 7948 df-2nd 7949 df-frecs 8238 df-wrecs 8269 df-recs 8318 df-rdg 8356 df-er 8649 df-map 8779 df-en 8897 df-dom 8898 df-sdom 8899 df-sup 9370 df-inf 9371 df-pnf 11189 df-mnf 11190 df-xr 11191 df-ltxr 11192 df-le 11193 df-sub 11386 df-neg 11387 df-nn 12166 df-n0 12422 df-z 12509 df-uz 12773 df-ram 16950 |
| This theorem is referenced by: ramub 16962 |
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