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Mirrors > Home > ILE Home > Th. List > df-pss | Unicode version |
Description: Define proper subclass
relationship between two classes. Definition 5.9
of [TakeutiZaring] p. 17. Note that
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Ref | Expression |
---|---|
df-pss |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cA |
. . 3
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2 | cB |
. . 3
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3 | 1, 2 | wpss 2912 |
. 2
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4 | 1, 2 | wss 2911 |
. . 3
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5 | 1, 2 | wne 2201 |
. . 3
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6 | 4, 5 | wa 97 |
. 2
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7 | 3, 6 | wb 98 |
1
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Colors of variables: wff set class |
This definition is referenced by: dfpss2 3023 psseq1 3025 psseq2 3026 pssss 3033 pssne 3034 nssinpss 3163 0pss 3259 difsnpssim 3498 |
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