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Mirrors > Home > MPE Home > Th. List > prnmadd | Structured version Visualization version GIF version |
Description: A positive real has no largest member. Addition version. (Contributed by NM, 7-Apr-1996.) (Revised by Mario Carneiro, 11-May-2013.) (New usage is discouraged.) |
Ref | Expression |
---|---|
prnmadd | ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ 𝐴) → ∃𝑥(𝐵 +Q 𝑥) ∈ 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | prnmax 10105 | . 2 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ 𝐴) → ∃𝑦 ∈ 𝐴 𝐵 <Q 𝑦) | |
2 | ltrelnq 10036 | . . . . . . 7 ⊢ <Q ⊆ (Q × Q) | |
3 | 2 | brel 5371 | . . . . . 6 ⊢ (𝐵 <Q 𝑦 → (𝐵 ∈ Q ∧ 𝑦 ∈ Q)) |
4 | 3 | simprd 490 | . . . . 5 ⊢ (𝐵 <Q 𝑦 → 𝑦 ∈ Q) |
5 | ltexnq 10085 | . . . . . 6 ⊢ (𝑦 ∈ Q → (𝐵 <Q 𝑦 ↔ ∃𝑥(𝐵 +Q 𝑥) = 𝑦)) | |
6 | 5 | biimpcd 241 | . . . . 5 ⊢ (𝐵 <Q 𝑦 → (𝑦 ∈ Q → ∃𝑥(𝐵 +Q 𝑥) = 𝑦)) |
7 | 4, 6 | mpd 15 | . . . 4 ⊢ (𝐵 <Q 𝑦 → ∃𝑥(𝐵 +Q 𝑥) = 𝑦) |
8 | eleq1a 2873 | . . . . 5 ⊢ (𝑦 ∈ 𝐴 → ((𝐵 +Q 𝑥) = 𝑦 → (𝐵 +Q 𝑥) ∈ 𝐴)) | |
9 | 8 | eximdv 2013 | . . . 4 ⊢ (𝑦 ∈ 𝐴 → (∃𝑥(𝐵 +Q 𝑥) = 𝑦 → ∃𝑥(𝐵 +Q 𝑥) ∈ 𝐴)) |
10 | 7, 9 | syl5 34 | . . 3 ⊢ (𝑦 ∈ 𝐴 → (𝐵 <Q 𝑦 → ∃𝑥(𝐵 +Q 𝑥) ∈ 𝐴)) |
11 | 10 | rexlimiv 3208 | . 2 ⊢ (∃𝑦 ∈ 𝐴 𝐵 <Q 𝑦 → ∃𝑥(𝐵 +Q 𝑥) ∈ 𝐴) |
12 | 1, 11 | syl 17 | 1 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ 𝐴) → ∃𝑥(𝐵 +Q 𝑥) ∈ 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 385 = wceq 1653 ∃wex 1875 ∈ wcel 2157 ∃wrex 3090 class class class wbr 4843 (class class class)co 6878 Qcnq 9962 +Q cplq 9965 <Q cltq 9968 Pcnp 9969 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1891 ax-4 1905 ax-5 2006 ax-6 2072 ax-7 2107 ax-8 2159 ax-9 2166 ax-10 2185 ax-11 2200 ax-12 2213 ax-13 2377 ax-ext 2777 ax-sep 4975 ax-nul 4983 ax-pow 5035 ax-pr 5097 ax-un 7183 |
This theorem depends on definitions: df-bi 199 df-an 386 df-or 875 df-3or 1109 df-3an 1110 df-tru 1657 df-ex 1876 df-nf 1880 df-sb 2065 df-mo 2591 df-eu 2609 df-clab 2786 df-cleq 2792 df-clel 2795 df-nfc 2930 df-ne 2972 df-ral 3094 df-rex 3095 df-reu 3096 df-rmo 3097 df-rab 3098 df-v 3387 df-sbc 3634 df-csb 3729 df-dif 3772 df-un 3774 df-in 3776 df-ss 3783 df-pss 3785 df-nul 4116 df-if 4278 df-pw 4351 df-sn 4369 df-pr 4371 df-tp 4373 df-op 4375 df-uni 4629 df-int 4668 df-iun 4712 df-br 4844 df-opab 4906 df-mpt 4923 df-tr 4946 df-id 5220 df-eprel 5225 df-po 5233 df-so 5234 df-fr 5271 df-we 5273 df-xp 5318 df-rel 5319 df-cnv 5320 df-co 5321 df-dm 5322 df-rn 5323 df-res 5324 df-ima 5325 df-pred 5898 df-ord 5944 df-on 5945 df-lim 5946 df-suc 5947 df-iota 6064 df-fun 6103 df-fn 6104 df-f 6105 df-f1 6106 df-fo 6107 df-f1o 6108 df-fv 6109 df-ov 6881 df-oprab 6882 df-mpt2 6883 df-om 7300 df-1st 7401 df-2nd 7402 df-wrecs 7645 df-recs 7707 df-rdg 7745 df-1o 7799 df-oadd 7803 df-omul 7804 df-er 7982 df-ni 9982 df-pli 9983 df-mi 9984 df-lti 9985 df-plpq 10018 df-mpq 10019 df-ltpq 10020 df-enq 10021 df-nq 10022 df-erq 10023 df-plq 10024 df-mq 10025 df-1nq 10026 df-ltnq 10028 df-np 10091 |
This theorem is referenced by: ltexprlem1 10146 ltexprlem7 10152 |
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