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Mirrors > Home > ILE Home > Th. List > 1idpr | GIF version |
Description: 1 is an identity element for positive real multiplication. Theorem 9-3.7(iv) of [Gleason] p. 124. (Contributed by NM, 2-Apr-1996.) |
Ref | Expression |
---|---|
1idpr | ⊢ (𝐴 ∈ P → (𝐴 ·P 1P) = 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1idprl 7552 | . 2 ⊢ (𝐴 ∈ P → (1st ‘(𝐴 ·P 1P)) = (1st ‘𝐴)) | |
2 | 1idpru 7553 | . 2 ⊢ (𝐴 ∈ P → (2nd ‘(𝐴 ·P 1P)) = (2nd ‘𝐴)) | |
3 | 1pr 7516 | . . . 4 ⊢ 1P ∈ P | |
4 | mulclpr 7534 | . . . 4 ⊢ ((𝐴 ∈ P ∧ 1P ∈ P) → (𝐴 ·P 1P) ∈ P) | |
5 | 3, 4 | mpan2 423 | . . 3 ⊢ (𝐴 ∈ P → (𝐴 ·P 1P) ∈ P) |
6 | preqlu 7434 | . . 3 ⊢ (((𝐴 ·P 1P) ∈ P ∧ 𝐴 ∈ P) → ((𝐴 ·P 1P) = 𝐴 ↔ ((1st ‘(𝐴 ·P 1P)) = (1st ‘𝐴) ∧ (2nd ‘(𝐴 ·P 1P)) = (2nd ‘𝐴)))) | |
7 | 5, 6 | mpancom 420 | . 2 ⊢ (𝐴 ∈ P → ((𝐴 ·P 1P) = 𝐴 ↔ ((1st ‘(𝐴 ·P 1P)) = (1st ‘𝐴) ∧ (2nd ‘(𝐴 ·P 1P)) = (2nd ‘𝐴)))) |
8 | 1, 2, 7 | mpbir2and 939 | 1 ⊢ (𝐴 ∈ P → (𝐴 ·P 1P) = 𝐴) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 = wceq 1348 ∈ wcel 2141 ‘cfv 5198 (class class class)co 5853 1st c1st 6117 2nd c2nd 6118 Pcnp 7253 1Pc1p 7254 ·P cmp 7256 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-coll 4104 ax-sep 4107 ax-nul 4115 ax-pow 4160 ax-pr 4194 ax-un 4418 ax-setind 4521 ax-iinf 4572 |
This theorem depends on definitions: df-bi 116 df-dc 830 df-3or 974 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-ral 2453 df-rex 2454 df-reu 2455 df-rab 2457 df-v 2732 df-sbc 2956 df-csb 3050 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-nul 3415 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-uni 3797 df-int 3832 df-iun 3875 df-br 3990 df-opab 4051 df-mpt 4052 df-tr 4088 df-eprel 4274 df-id 4278 df-po 4281 df-iso 4282 df-iord 4351 df-on 4353 df-suc 4356 df-iom 4575 df-xp 4617 df-rel 4618 df-cnv 4619 df-co 4620 df-dm 4621 df-rn 4622 df-res 4623 df-ima 4624 df-iota 5160 df-fun 5200 df-fn 5201 df-f 5202 df-f1 5203 df-fo 5204 df-f1o 5205 df-fv 5206 df-ov 5856 df-oprab 5857 df-mpo 5858 df-1st 6119 df-2nd 6120 df-recs 6284 df-irdg 6349 df-1o 6395 df-2o 6396 df-oadd 6399 df-omul 6400 df-er 6513 df-ec 6515 df-qs 6519 df-ni 7266 df-pli 7267 df-mi 7268 df-lti 7269 df-plpq 7306 df-mpq 7307 df-enq 7309 df-nqqs 7310 df-plqqs 7311 df-mqqs 7312 df-1nqqs 7313 df-rq 7314 df-ltnqqs 7315 df-enq0 7386 df-nq0 7387 df-0nq0 7388 df-plq0 7389 df-mq0 7390 df-inp 7428 df-i1p 7429 df-imp 7431 |
This theorem is referenced by: ltmprr 7604 m1m1sr 7723 1idsr 7730 recidpirqlemcalc 7819 |
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