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Mirrors > Home > MPE Home > Th. List > hashinfxadd | Structured version Visualization version GIF version |
Description: The extended real addition of the size of an infinite set with the size of an arbitrary set yields plus infinity. (Contributed by Alexander van der Vekens, 20-Dec-2017.) |
Ref | Expression |
---|---|
hashinfxadd | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ (♯‘𝐴) ∉ ℕ0) → ((♯‘𝐴) +𝑒 (♯‘𝐵)) = +∞) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | hashnn0pnf 14052 | . . . . 5 ⊢ (𝐴 ∈ 𝑉 → ((♯‘𝐴) ∈ ℕ0 ∨ (♯‘𝐴) = +∞)) | |
2 | df-nel 3052 | . . . . . . . . 9 ⊢ ((♯‘𝐴) ∉ ℕ0 ↔ ¬ (♯‘𝐴) ∈ ℕ0) | |
3 | 2 | anbi2i 623 | . . . . . . . 8 ⊢ ((((♯‘𝐴) = +∞ ∨ (♯‘𝐴) ∈ ℕ0) ∧ (♯‘𝐴) ∉ ℕ0) ↔ (((♯‘𝐴) = +∞ ∨ (♯‘𝐴) ∈ ℕ0) ∧ ¬ (♯‘𝐴) ∈ ℕ0)) |
4 | pm5.61 998 | . . . . . . . 8 ⊢ ((((♯‘𝐴) = +∞ ∨ (♯‘𝐴) ∈ ℕ0) ∧ ¬ (♯‘𝐴) ∈ ℕ0) ↔ ((♯‘𝐴) = +∞ ∧ ¬ (♯‘𝐴) ∈ ℕ0)) | |
5 | 3, 4 | sylbb 218 | . . . . . . 7 ⊢ ((((♯‘𝐴) = +∞ ∨ (♯‘𝐴) ∈ ℕ0) ∧ (♯‘𝐴) ∉ ℕ0) → ((♯‘𝐴) = +∞ ∧ ¬ (♯‘𝐴) ∈ ℕ0)) |
6 | 5 | ex 413 | . . . . . 6 ⊢ (((♯‘𝐴) = +∞ ∨ (♯‘𝐴) ∈ ℕ0) → ((♯‘𝐴) ∉ ℕ0 → ((♯‘𝐴) = +∞ ∧ ¬ (♯‘𝐴) ∈ ℕ0))) |
7 | 6 | orcoms 869 | . . . . 5 ⊢ (((♯‘𝐴) ∈ ℕ0 ∨ (♯‘𝐴) = +∞) → ((♯‘𝐴) ∉ ℕ0 → ((♯‘𝐴) = +∞ ∧ ¬ (♯‘𝐴) ∈ ℕ0))) |
8 | 1, 7 | syl 17 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → ((♯‘𝐴) ∉ ℕ0 → ((♯‘𝐴) = +∞ ∧ ¬ (♯‘𝐴) ∈ ℕ0))) |
9 | 8 | imp 407 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ (♯‘𝐴) ∉ ℕ0) → ((♯‘𝐴) = +∞ ∧ ¬ (♯‘𝐴) ∈ ℕ0)) |
10 | 9 | 3adant2 1130 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ (♯‘𝐴) ∉ ℕ0) → ((♯‘𝐴) = +∞ ∧ ¬ (♯‘𝐴) ∈ ℕ0)) |
11 | oveq1 7276 | . . . . 5 ⊢ ((♯‘𝐴) = +∞ → ((♯‘𝐴) +𝑒 (♯‘𝐵)) = (+∞ +𝑒 (♯‘𝐵))) | |
12 | hashxrcl 14068 | . . . . . . . 8 ⊢ (𝐵 ∈ 𝑊 → (♯‘𝐵) ∈ ℝ*) | |
13 | hashnemnf 14054 | . . . . . . . 8 ⊢ (𝐵 ∈ 𝑊 → (♯‘𝐵) ≠ -∞) | |
14 | 12, 13 | jca 512 | . . . . . . 7 ⊢ (𝐵 ∈ 𝑊 → ((♯‘𝐵) ∈ ℝ* ∧ (♯‘𝐵) ≠ -∞)) |
15 | 14 | 3ad2ant2 1133 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ (♯‘𝐴) ∉ ℕ0) → ((♯‘𝐵) ∈ ℝ* ∧ (♯‘𝐵) ≠ -∞)) |
16 | xaddpnf2 12958 | . . . . . 6 ⊢ (((♯‘𝐵) ∈ ℝ* ∧ (♯‘𝐵) ≠ -∞) → (+∞ +𝑒 (♯‘𝐵)) = +∞) | |
17 | 15, 16 | syl 17 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ (♯‘𝐴) ∉ ℕ0) → (+∞ +𝑒 (♯‘𝐵)) = +∞) |
18 | 11, 17 | sylan9eqr 2802 | . . . 4 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ (♯‘𝐴) ∉ ℕ0) ∧ (♯‘𝐴) = +∞) → ((♯‘𝐴) +𝑒 (♯‘𝐵)) = +∞) |
19 | 18 | expcom 414 | . . 3 ⊢ ((♯‘𝐴) = +∞ → ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ (♯‘𝐴) ∉ ℕ0) → ((♯‘𝐴) +𝑒 (♯‘𝐵)) = +∞)) |
20 | 19 | adantr 481 | . 2 ⊢ (((♯‘𝐴) = +∞ ∧ ¬ (♯‘𝐴) ∈ ℕ0) → ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ (♯‘𝐴) ∉ ℕ0) → ((♯‘𝐴) +𝑒 (♯‘𝐵)) = +∞)) |
21 | 10, 20 | mpcom 38 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ (♯‘𝐴) ∉ ℕ0) → ((♯‘𝐴) +𝑒 (♯‘𝐵)) = +∞) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 396 ∨ wo 844 ∧ w3a 1086 = wceq 1542 ∈ wcel 2110 ≠ wne 2945 ∉ wnel 3051 ‘cfv 6431 (class class class)co 7269 +∞cpnf 11005 -∞cmnf 11006 ℝ*cxr 11007 ℕ0cn0 12231 +𝑒 cxad 12843 ♯chash 14040 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2015 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2711 ax-sep 5227 ax-nul 5234 ax-pow 5292 ax-pr 5356 ax-un 7580 ax-cnex 10926 ax-resscn 10927 ax-1cn 10928 ax-icn 10929 ax-addcl 10930 ax-addrcl 10931 ax-mulcl 10932 ax-mulrcl 10933 ax-mulcom 10934 ax-addass 10935 ax-mulass 10936 ax-distr 10937 ax-i2m1 10938 ax-1ne0 10939 ax-1rid 10940 ax-rnegex 10941 ax-rrecex 10942 ax-cnre 10943 ax-pre-lttri 10944 ax-pre-lttrn 10945 ax-pre-ltadd 10946 ax-pre-mulgt0 10947 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2072 df-mo 2542 df-eu 2571 df-clab 2718 df-cleq 2732 df-clel 2818 df-nfc 2891 df-ne 2946 df-nel 3052 df-ral 3071 df-rex 3072 df-reu 3073 df-rab 3075 df-v 3433 df-sbc 3721 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4846 df-int 4886 df-iun 4932 df-br 5080 df-opab 5142 df-mpt 5163 df-tr 5197 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6200 df-ord 6267 df-on 6268 df-lim 6269 df-suc 6270 df-iota 6389 df-fun 6433 df-fn 6434 df-f 6435 df-f1 6436 df-fo 6437 df-f1o 6438 df-fv 6439 df-riota 7226 df-ov 7272 df-oprab 7273 df-mpo 7274 df-om 7705 df-2nd 7823 df-frecs 8086 df-wrecs 8117 df-recs 8191 df-rdg 8230 df-1o 8286 df-er 8479 df-en 8715 df-dom 8716 df-sdom 8717 df-fin 8718 df-card 9696 df-pnf 11010 df-mnf 11011 df-xr 11012 df-ltxr 11013 df-le 11014 df-sub 11205 df-neg 11206 df-nn 11972 df-n0 12232 df-xnn0 12304 df-z 12318 df-uz 12580 df-xadd 12846 df-hash 14041 |
This theorem is referenced by: hashunx 14097 |
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