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Mirrors > Home > NFE Home > Th. List > df-rex | Unicode version |
Description: Define restricted existential quantification. Special case of Definition 4.15(4) of [TakeutiZaring] p. 22. (Contributed by NM, 30-Aug-1993.) |
Ref | Expression |
---|---|
df-rex |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | wph |
. . 3
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2 | vx |
. . 3
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3 | cA |
. . 3
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4 | 1, 2, 3 | wrex 2616 |
. 2
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5 | 2 | cv 1641 |
. . . . 5
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6 | 5, 3 | wcel 1710 |
. . . 4
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7 | 6, 1 | wa 358 |
. . 3
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8 | 7, 2 | wex 1541 |
. 2
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9 | 4, 8 | wb 176 |
1
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