| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > subrg1cl | Structured version Visualization version GIF version | ||
| Description: A subring contains the multiplicative identity. (Contributed by Stefan O'Rear, 27-Nov-2014.) |
| Ref | Expression |
|---|---|
| subrg1cl.a | ⊢ 1 = (1r‘𝑅) |
| Ref | Expression |
|---|---|
| subrg1cl | ⊢ (𝐴 ∈ (SubRing‘𝑅) → 1 ∈ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2736 | . . . 4 ⊢ (Base‘𝑅) = (Base‘𝑅) | |
| 2 | subrg1cl.a | . . . 4 ⊢ 1 = (1r‘𝑅) | |
| 3 | 1, 2 | issubrg 20504 | . . 3 ⊢ (𝐴 ∈ (SubRing‘𝑅) ↔ ((𝑅 ∈ Ring ∧ (𝑅 ↾s 𝐴) ∈ Ring) ∧ (𝐴 ⊆ (Base‘𝑅) ∧ 1 ∈ 𝐴))) |
| 4 | 3 | simprbi 496 | . 2 ⊢ (𝐴 ∈ (SubRing‘𝑅) → (𝐴 ⊆ (Base‘𝑅) ∧ 1 ∈ 𝐴)) |
| 5 | 4 | simprd 495 | 1 ⊢ (𝐴 ∈ (SubRing‘𝑅) → 1 ∈ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2113 ⊆ wss 3901 ‘cfv 6492 (class class class)co 7358 Basecbs 17136 ↾s cress 17157 1rcur 20116 Ringcrg 20168 SubRingcsubrg 20502 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-mpt 5180 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fv 6500 df-ov 7361 df-subrg 20503 |
| This theorem is referenced by: subrg1 20515 subrgsubm 20518 issubrg2 20525 subrgint 20528 subsubrg 20531 primefld1cl 20740 zsssubrg 21380 issubassa2 21848 subrgpsr 21933 mplassa 21977 mplbas2 21997 ply1assa 22140 asclply1subcl 22318 evls1maprhm 22320 isclmp 25053 taylply2 26331 taylply2OLD 26332 subrgchr 33319 0ringsubrg 33333 fldgensdrg 33396 primefldgen1 33403 ressply1evls1 33646 drgextlsp 33750 fldgenfldext 33825 evls1fldgencl 33827 fldextrspundgdvdslem 33837 fldextrspundgdvds 33838 ply1annnr 33860 algextdeglem4 33877 rtelextdg2lem 33883 evlsmaprhm 42816 cnsrexpcl 43407 rngunsnply 43411 |
| Copyright terms: Public domain | W3C validator |