Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > srgen1zr | GIF version |
Description: The only semiring with one element is the zero ring (at least if its operations are internal binary operations). (Contributed by FL, 14-Feb-2010.) (Revised by AV, 25-Jan-2020.) |
Ref | Expression |
---|---|
srg1zr.b | ⊢ 𝐵 = (Base‘𝑅) |
srg1zr.p | ⊢ + = (+g‘𝑅) |
srg1zr.t | ⊢ ∗ = (.r‘𝑅) |
srgen1zr.p | ⊢ 𝑍 = (0g‘𝑅) |
Ref | Expression |
---|---|
srgen1zr | ⊢ ((𝑅 ∈ SRing ∧ + Fn (𝐵 × 𝐵) ∧ ∗ Fn (𝐵 × 𝐵)) → (𝐵 ≈ 1o ↔ ( + = {〈〈𝑍, 𝑍〉, 𝑍〉} ∧ ∗ = {〈〈𝑍, 𝑍〉, 𝑍〉}))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | srg1zr.b | . . . 4 ⊢ 𝐵 = (Base‘𝑅) | |
2 | srgen1zr.p | . . . 4 ⊢ 𝑍 = (0g‘𝑅) | |
3 | 1, 2 | srg0cl 12953 | . . 3 ⊢ (𝑅 ∈ SRing → 𝑍 ∈ 𝐵) |
4 | 3 | 3ad2ant1 1018 | . 2 ⊢ ((𝑅 ∈ SRing ∧ + Fn (𝐵 × 𝐵) ∧ ∗ Fn (𝐵 × 𝐵)) → 𝑍 ∈ 𝐵) |
5 | en1eqsnbi 6938 | . . . 4 ⊢ (𝑍 ∈ 𝐵 → (𝐵 ≈ 1o ↔ 𝐵 = {𝑍})) | |
6 | 5 | adantl 277 | . . 3 ⊢ (((𝑅 ∈ SRing ∧ + Fn (𝐵 × 𝐵) ∧ ∗ Fn (𝐵 × 𝐵)) ∧ 𝑍 ∈ 𝐵) → (𝐵 ≈ 1o ↔ 𝐵 = {𝑍})) |
7 | srg1zr.p | . . . 4 ⊢ + = (+g‘𝑅) | |
8 | srg1zr.t | . . . 4 ⊢ ∗ = (.r‘𝑅) | |
9 | 1, 7, 8 | srg1zr 12963 | . . 3 ⊢ (((𝑅 ∈ SRing ∧ + Fn (𝐵 × 𝐵) ∧ ∗ Fn (𝐵 × 𝐵)) ∧ 𝑍 ∈ 𝐵) → (𝐵 = {𝑍} ↔ ( + = {〈〈𝑍, 𝑍〉, 𝑍〉} ∧ ∗ = {〈〈𝑍, 𝑍〉, 𝑍〉}))) |
10 | 6, 9 | bitrd 188 | . 2 ⊢ (((𝑅 ∈ SRing ∧ + Fn (𝐵 × 𝐵) ∧ ∗ Fn (𝐵 × 𝐵)) ∧ 𝑍 ∈ 𝐵) → (𝐵 ≈ 1o ↔ ( + = {〈〈𝑍, 𝑍〉, 𝑍〉} ∧ ∗ = {〈〈𝑍, 𝑍〉, 𝑍〉}))) |
11 | 4, 10 | mpdan 421 | 1 ⊢ ((𝑅 ∈ SRing ∧ + Fn (𝐵 × 𝐵) ∧ ∗ Fn (𝐵 × 𝐵)) → (𝐵 ≈ 1o ↔ ( + = {〈〈𝑍, 𝑍〉, 𝑍〉} ∧ ∗ = {〈〈𝑍, 𝑍〉, 𝑍〉}))) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∧ w3a 978 = wceq 1353 ∈ wcel 2146 {csn 3589 〈cop 3592 class class class wbr 3998 × cxp 4618 Fn wfn 5203 ‘cfv 5208 1oc1o 6400 ≈ cen 6728 Basecbs 12428 +gcplusg 12492 .rcmulr 12493 0gc0g 12626 SRingcsrg 12939 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 614 ax-in2 615 ax-io 709 ax-5 1445 ax-7 1446 ax-gen 1447 ax-ie1 1491 ax-ie2 1492 ax-8 1502 ax-10 1503 ax-11 1504 ax-i12 1505 ax-bndl 1507 ax-4 1508 ax-17 1524 ax-i9 1528 ax-ial 1532 ax-i5r 1533 ax-13 2148 ax-14 2149 ax-ext 2157 ax-coll 4113 ax-sep 4116 ax-nul 4124 ax-pow 4169 ax-pr 4203 ax-un 4427 ax-setind 4530 ax-iinf 4581 ax-cnex 7877 ax-resscn 7878 ax-1cn 7879 ax-1re 7880 ax-icn 7881 ax-addcl 7882 ax-addrcl 7883 ax-mulcl 7884 ax-addcom 7886 ax-addass 7888 ax-i2m1 7891 ax-0lt1 7892 ax-0id 7894 ax-rnegex 7895 ax-pre-ltirr 7898 ax-pre-ltadd 7902 |
This theorem depends on definitions: df-bi 117 df-dc 835 df-3or 979 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1459 df-sb 1761 df-eu 2027 df-mo 2028 df-clab 2162 df-cleq 2168 df-clel 2171 df-nfc 2306 df-ne 2346 df-nel 2441 df-ral 2458 df-rex 2459 df-reu 2460 df-rmo 2461 df-rab 2462 df-v 2737 df-sbc 2961 df-csb 3056 df-dif 3129 df-un 3131 df-in 3133 df-ss 3140 df-nul 3421 df-if 3533 df-pw 3574 df-sn 3595 df-pr 3596 df-op 3598 df-uni 3806 df-int 3841 df-iun 3884 df-br 3999 df-opab 4060 df-mpt 4061 df-tr 4097 df-id 4287 df-iord 4360 df-on 4362 df-suc 4365 df-iom 4584 df-xp 4626 df-rel 4627 df-cnv 4628 df-co 4629 df-dm 4630 df-rn 4631 df-res 4632 df-ima 4633 df-iota 5170 df-fun 5210 df-fn 5211 df-f 5212 df-f1 5213 df-fo 5214 df-f1o 5215 df-fv 5216 df-riota 5821 df-ov 5868 df-oprab 5869 df-mpo 5870 df-1st 6131 df-2nd 6132 df-1o 6407 df-er 6525 df-en 6731 df-fin 6733 df-pnf 7968 df-mnf 7969 df-ltxr 7971 df-inn 8891 df-2 8949 df-3 8950 df-ndx 12431 df-slot 12432 df-base 12434 df-sets 12435 df-plusg 12505 df-mulr 12506 df-0g 12628 df-plusf 12639 df-mgm 12640 df-sgrp 12673 df-mnd 12683 df-cmn 12886 df-mgp 12926 df-srg 12940 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |