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Mirrors > Home > ILE Home > Th. List > eluz2 | Unicode version |
Description: Membership in an upper
set of integers. We use the fact that a
function's value (under our function value definition) is empty outside
of its domain to show ![]() ![]() ![]() |
Ref | Expression |
---|---|
eluz2 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eluzel2 9597 |
. 2
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2 | simp1 999 |
. 2
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3 | eluz1 9596 |
. . . 4
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4 | ibar 301 |
. . . 4
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5 | 3, 4 | bitrd 188 |
. . 3
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6 | 3anass 984 |
. . 3
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7 | 5, 6 | bitr4di 198 |
. 2
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8 | 1, 2, 7 | pm5.21nii 705 |
1
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