Proof of Theorem supsrlem2
| Step | Hyp | Ref
| Expression |
| 1 | | m1r 3985 |
. . . . . . 7
⊢ -1R ∈
R |
| 2 | | mulclsr 3987 |
. . . . . . 7
⊢ ((A
∈ R ∧ -1R ∈
R) → (A
·R -1R) ∈
R) |
| 3 | 1, 2 | mpan2 519 |
. . . . . 6
⊢ (A
∈ R → (A
·R -1R) ∈
R) |
| 4 | | supsrlem.1 |
. . . . . 6
⊢ C
∈ R |
| 5 | 3, 4 | jctir 241 |
. . . . 5
⊢ (A
∈ R → ((A
·R -1R) ∈
R ∧ C ∈
R)) |
| 6 | | addclsr 3986 |
. . . . 5
⊢ (((A
·R -1R) ∈
R ∧ C ∈
R) → ((A
·R -1R)
+R C) ∈
R) |
| 7 | 5, 6 | syl 12 |
. . . 4
⊢ (A
∈ R → ((A
·R -1R)
+R C) ∈
R) |
| 8 | | addclsr 3986 |
. . . . 5
⊢ ((((A
·R -1R)
+R C) ∈
R ∧ -1R ∈ R)
→ (((A
·R -1R)
+R C)
+R -1R) ∈
R) |
| 9 | 1, 8 | mpan2 519 |
. . . 4
⊢ (((A
·R -1R)
+R C) ∈
R → (((A
·R -1R)
+R C)
+R -1R) ∈
R) |
| 10 | | negexsr 4005 |
. . . 4
⊢ ((((A
·R -1R)
+R C)
+R -1R) ∈
R → ∃x(x ∈ R ∧ ((((A ·R
-1R) +R C) +R
-1R) +R x) = 0R)) |
| 11 | 7, 9, 10 | 3syl 21 |
. . 3
⊢ (A
∈ R → ∃x(x ∈
R ∧ ((((A
·R -1R)
+R C)
+R -1R)
+R x) =
0R)) |
| 12 | | pn0sr 4004 |
. . . . . . . . . . 11
⊢ (A
∈ R → (A
+R (A
·R -1R)) =
0R) |
| 13 | 12 | opreq1d 3012 |
. . . . . . . . . 10
⊢ (A
∈ R → ((A
+R (A
·R -1R))
+R (C
+R (x
+R -1R))) =
(0R +R (C +R (x +R
-1R)))) |
| 14 | | addclsr 3986 |
. . . . . . . . . . . . . 14
⊢ ((x
∈ R ∧ -1R ∈
R) → (x
+R -1R) ∈
R) |
| 15 | 1, 14 | mpan2 519 |
. . . . . . . . . . . . 13
⊢ (x
∈ R → (x
+R -1R) ∈
R) |
| 16 | 15, 4 | jctil 240 |
. . . . . . . . . . . 12
⊢ (x
∈ R → (C ∈
R ∧ (x
+R -1R) ∈
R)) |
| 17 | | addclsr 3986 |
. . . . . . . . . . . 12
⊢ ((C
∈ R ∧ (x
+R -1R) ∈
R) → (C
+R (x
+R -1R)) ∈
R) |
| 18 | | 0idsr 4000 |
. . . . . . . . . . . 12
⊢ ((C
+R (x
+R -1R)) ∈
R → ((C
+R (x
+R -1R))
+R 0R) = (C +R (x +R
-1R))) |
| 19 | 16, 17, 18 | 3syl 21 |
. . . . . . . . . . 11
⊢ (x
∈ R → ((C
+R (x
+R -1R))
+R 0R) = (C +R (x +R
-1R))) |
| 20 | | oprex 3018 |
. . . . . . . . . . . 12
⊢ (C
+R (x
+R -1R)) ∈
V |
| 21 | | 0r 3983 |
. . . . . . . . . . . . 13
⊢ 0R ∈
R |
| 22 | 21 | elisseti 1355 |
. . . . . . . . . . . 12
⊢ 0R ∈
V |
| 23 | 20, 22 | addcomsr 3990 |
. . . . . . . . . . 11
⊢ ((C
+R (x
+R -1R))
+R 0R) =
(0R +R (C +R (x +R
-1R))) |
| 24 | 19, 23 | syl5eqr 1138 |
. . . . . . . . . 10
⊢ (x
∈ R → (0R
+R (C
+R (x
+R -1R))) = (C +R (x +R
-1R))) |
| 25 | 13, 24 | sylan9eq 1144 |
. . . . . . . . 9
⊢ ((A
∈ R ∧ x ∈
R) → ((A
+R (A
·R -1R))
+R (C
+R (x
+R -1R))) = (C +R (x +R
-1R))) |
| 26 | | oprex 3018 |
. . . . . . . . . 10
⊢ (A
·R -1R) ∈
V |
| 27 | 26, 20 | addasssr 3991 |
. . . . . . . . 9
⊢ ((A
+R (A
·R -1R))
+R (C
+R (x
+R -1R))) = (A +R ((A ·R
-1R) +R (C +R (x +R
-1R)))) |
| 28 | 25, 27 | syl5eqr 1138 |
. . . . . . . 8
⊢ ((A
∈ R ∧ x ∈
R) → (A
+R ((A
·R -1R)
+R (C
+R (x
+R -1R)))) = (C +R (x +R
-1R))) |
| 29 | | 0idsr 4000 |
. . . . . . . . 9
⊢ (A
∈ R → (A
+R 0R) = A) |
| 30 | 29 | adantr 306 |
. . . . . . . 8
⊢ ((A
∈ R ∧ x ∈
R) → (A
+R 0R) = A) |
| 31 | 28, 30 | cleq12d 1115 |
. . . . . . 7
⊢ ((A
∈ R ∧ x ∈
R) → ((A
+R ((A
·R -1R)
+R (C
+R (x
+R -1R)))) = (A +R
0R) ↔ (C
+R (x
+R -1R)) = A)) |
| 32 | 1 | elisseti 1355 |
. . . . . . . . . . 11
⊢ -1R ∈
V |
| 33 | | visset 1350 |
. . . . . . . . . . 11
⊢ x
∈ V |
| 34 | 32, 33 | addasssr 3991 |
. . . . . . . . . 10
⊢ ((((A
·R -1R)
+R C)
+R -1R)
+R x) =
(((A ·R
-1R) +R C) +R
(-1R +R x)) |
| 35 | 32, 33 | addcomsr 3990 |
. . . . . . . . . . 11
⊢ (-1R
+R x) = (x +R
-1R) |
| 36 | 35 | opreq2i 3010 |
. . . . . . . . . 10
⊢ (((A
·R -1R)
+R C)
+R (-1R
+R x)) =
(((A ·R
-1R) +R C) +R (x +R
-1R)) |
| 37 | 4 | elisseti 1355 |
. . . . . . . . . . 11
⊢ C
∈ V |
| 38 | | oprex 3018 |
. . . . . . . . . . 11
⊢ (x
+R -1R) ∈
V |
| 39 | 37, 38 | addasssr 3991 |
. . . . . . . . . 10
⊢ (((A
·R -1R)
+R C)
+R (x
+R -1R)) = ((A ·R
-1R) +R (C +R (x +R
-1R))) |
| 40 | 34, 36, 39 | 3eqtr 1123 |
. . . . . . . . 9
⊢ ((((A
·R -1R)
+R C)
+R -1R)
+R x) = ((A ·R
-1R) +R (C +R (x +R
-1R))) |
| 41 | 40 | cleq1i 1108 |
. . . . . . . 8
⊢ (((((A
·R -1R)
+R C)
+R -1R)
+R x) =
0R ↔ ((A
·R -1R)
+R (C
+R (x
+R -1R))) =
0R) |
| 42 | | opreq2 3007 |
. . . . . . . 8
⊢ (((A
·R -1R)
+R (C
+R (x
+R -1R))) =
0R → (A
+R ((A
·R -1R)
+R (C
+R (x
+R -1R)))) = (A +R
0R)) |
| 43 | 41, 42 | sylbi 174 |
. . . . . . 7
⊢ (((((A
·R -1R)
+R C)
+R -1R)
+R x) =
0R → (A
+R ((A
·R -1R)
+R (C
+R (x
+R -1R)))) = (A +R
0R)) |
| 44 | 31, 43 | syl5bi 183 |
. . . . . 6
⊢ ((A
∈ R ∧ x ∈
R) → (((((A
·R -1R)
+R C)
+R -1R)
+R x) =
0R → (C
+R (x
+R -1R)) = A)) |
| 45 | 44 | exp 291 |
. . . . 5
⊢ (A
∈ R → (x ∈
R → (((((A
·R -1R)
+R C)
+R -1R)
+R x) =
0R → (C
+R (x
+R -1R)) = A))) |
| 46 | 45 | imdistand 342 |
. . . 4
⊢ (A
∈ R → ((x ∈
R ∧ ((((A
·R -1R)
+R C)
+R -1R)
+R x) =
0R) → (x
∈ R ∧ (C
+R (x
+R -1R)) = A))) |
| 47 | 46 | 19.22dv 947 |
. . 3
⊢ (A
∈ R → (∃x(x ∈
R ∧ ((((A
·R -1R)
+R C)
+R -1R)
+R x) =
0R) → ∃x(x ∈
R ∧ (C
+R (x
+R -1R)) = A))) |
| 48 | 11, 47 | mpd 46 |
. 2
⊢ (A
∈ R → ∃x(x ∈
R ∧ (C
+R (x
+R -1R)) = A)) |
| 49 | | eleq1 1149 |
. . . . . 6
⊢ ((C
+R (x
+R -1R)) = A → ((C
+R (x
+R -1R)) ∈
R ↔ A ∈
R)) |
| 50 | 16, 17 | syl 12 |
. . . . . 6
⊢ (x
∈ R → (C
+R (x
+R -1R)) ∈
R) |
| 51 | 49, 50 | syl5bi 183 |
. . . . 5
⊢ ((C
+R (x
+R -1R)) = A → (x
∈ R → A ∈
R)) |
| 52 | 51 | com12 13 |
. . . 4
⊢ (x
∈ R → ((C
+R (x
+R -1R)) = A → A
∈ R)) |
| 53 | 52 | imp 277 |
. . 3
⊢ ((x
∈ R ∧ (C
+R (x
+R -1R)) = A) → A
∈ R) |
| 54 | 53 | 19.23aiv 952 |
. 2
⊢ (∃x(x ∈
R ∧ (C
+R (x
+R -1R)) = A) → A
∈ R) |
| 55 | 48, 54 | impbi 139 |
1
⊢ (A
∈ R ↔ ∃x(x ∈
R ∧ (C
+R (x
+R -1R)) = A)) |