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Mirrors > Home > MPE Home > Th. List > sbal2 | Structured version Visualization version Unicode version |
Description: Move quantifier in and out of substitution. (Contributed by NM, 2-Jan-2002.) Remove a distinct variable constraint. (Revised by Wolf Lammen, 3-Oct-2018.) |
Ref | Expression |
---|---|
sbal2 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sb4b 2358 |
. . . . 5
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2 | 1 | adantl 482 |
. . . 4
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3 | nfnae 2318 |
. . . . . 6
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4 | sb4b 2358 |
. . . . . 6
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5 | 3, 4 | albid 2090 |
. . . . 5
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6 | alcom 2037 |
. . . . . 6
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7 | nfnae 2318 |
. . . . . . 7
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8 | nfeqf1 2299 |
. . . . . . . 8
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9 | 19.21t 2073 |
. . . . . . . 8
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10 | 8, 9 | syl 17 |
. . . . . . 7
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11 | 7, 10 | albid 2090 |
. . . . . 6
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12 | 6, 11 | syl5bb 272 |
. . . . 5
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13 | 5, 12 | sylan9bbr 737 |
. . . 4
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14 | 2, 13 | bitr4d 271 |
. . 3
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15 | 14 | ex 450 |
. 2
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16 | sbid 2114 |
. . . 4
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17 | drsb2 2378 |
. . . 4
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18 | 16, 17 | syl5bbr 274 |
. . 3
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19 | sbid 2114 |
. . . . 5
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
20 | drsb2 2378 |
. . . . 5
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21 | 19, 20 | syl5bbr 274 |
. . . 4
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22 | 21 | dral2 2324 |
. . 3
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23 | 18, 22 | bitr3d 270 |
. 2
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24 | 15, 23 | pm2.61d2 172 |
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-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 |
This theorem is referenced by: 2sb5ndVD 39146 2sb5ndALT 39168 |
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