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Mathbox for Alexander van der Vekens |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > 2reu4 | Structured version Visualization version Unicode version |
Description: Definition of double
restricted existential uniqueness ("exactly one
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Ref | Expression |
---|---|
2reu4 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | reurex 3160 |
. . . 4
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2 | rexn0 4074 |
. . . 4
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3 | 1, 2 | syl 17 |
. . 3
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4 | reurex 3160 |
. . . 4
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5 | rexn0 4074 |
. . . 4
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6 | 4, 5 | syl 17 |
. . 3
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7 | 3, 6 | anim12i 590 |
. 2
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8 | ne0i 3921 |
. . . . . 6
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9 | ne0i 3921 |
. . . . . 6
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10 | 8, 9 | anim12i 590 |
. . . . 5
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11 | 10 | a1d 25 |
. . . 4
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12 | 11 | rexlimivv 3036 |
. . 3
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13 | 12 | adantr 481 |
. 2
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14 | 2reu4a 41189 |
. 2
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15 | 7, 13, 14 | pm5.21nii 368 |
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-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
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 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-v 3202 df-dif 3577 df-nul 3916 |
This theorem is referenced by: (None) |
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