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Mathbox for Alan Sare |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > e2ebindALT | Structured version Visualization version Unicode version |
Description: Absorption of an existential quantifier of a double existential quantifier of non-distinct variables. The proof is derived by completeusersproof.c from User's Proof in VirtualDeductionProofs.txt. The User's Proof in html format is displayed in e2ebindVD 39148. (Contributed by Alan Sare, 11-Sep-2016.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
e2ebindALT |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | axc11n 2307 |
. 2
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2 | nfe1 2027 |
. . . 4
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3 | 2 | 19.9 2072 |
. . 3
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4 | excom 2042 |
. . . 4
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5 | nfa1 2028 |
. . . . . 6
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6 | id 22 |
. . . . . . 7
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7 | biid 251 |
. . . . . . . . 9
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8 | 7 | a1i 11 |
. . . . . . . 8
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9 | 8 | drex1 2327 |
. . . . . . 7
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10 | 6, 9 | syl 17 |
. . . . . 6
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11 | 5, 10 | alrimi 2082 |
. . . . 5
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12 | exbi 1773 |
. . . . 5
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13 | 11, 12 | syl 17 |
. . . 4
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14 | bitr 745 |
. . . . . 6
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15 | 14 | ex 450 |
. . . . 5
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16 | 15 | impcom 446 |
. . . 4
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17 | 4, 13, 16 | sylancr 695 |
. . 3
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18 | bitr3 342 |
. . . 4
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19 | 18 | impcom 446 |
. . 3
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20 | 3, 17, 19 | sylancr 695 |
. 2
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21 | 1, 20 | syl 17 |
1
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Colors of variables: wff setvar class |
Syntax hints: ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-ex 1705 df-nf 1710 |
This theorem is referenced by: (None) |
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