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Mirrors > Home > ILE Home > Th. List > ax-iinf | Unicode version |
Description: Axiom of Infinity. Axiom 5 of [Crosilla] p. "Axioms of CZF and IZF". (Contributed by Jim Kingdon, 16-Nov-2018.) |
Ref | Expression |
---|---|
ax-iinf |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | c0 3422 |
. . . 4
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2 | vx |
. . . . 5
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3 | 2 | cv 1352 |
. . . 4
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4 | 1, 3 | wcel 2148 |
. . 3
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5 | vy |
. . . . . 6
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6 | 5, 2 | wel 2149 |
. . . . 5
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7 | 5 | cv 1352 |
. . . . . . 7
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8 | 7 | csuc 4362 |
. . . . . 6
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9 | 8, 3 | wcel 2148 |
. . . . 5
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10 | 6, 9 | wi 4 |
. . . 4
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11 | 10, 5 | wal 1351 |
. . 3
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12 | 4, 11 | wa 104 |
. 2
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13 | 12, 2 | wex 1492 |
1
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Colors of variables: wff set class |
This axiom is referenced by: zfinf2 4585 |
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